Hi there everyone,
Right i have spoke to a few peeps in the chat room but just want to get an opinon off as many people as poss.
i want to build a room in my loft that is about 6ft long by 3ft ish wide, so a rectangle shape really,
Im thinking of some kind of stud wall using eather plaster board/ chipboard or hard board?? What u lot think?
but i wanna do the wall in 2 layers (so board both sides of the stud) and put some kind of insulation inbetween the gap?? Whats the best stuff to use,
Or im thinking of using some stuff called astro foil i think its called and it comes on a roll 1.5m wide, its got tough foil eather side of what looks like bubble wrap, it says it has a 95% reflectivity and come in 3 or 6mm thick, but if i do use it inside the room i might just put mylar over it just so its a smooth shiny surface and not criss cross like the foil, Im gonna put it on the outter wall to if that will help keep the heat/cold out of the room, Im told it can keep out the heat from the loft/room?? But i not used it so would like some advise,
I have gone a really long way round asking whats the best type of insulation that will help keep the heat out of a room built within the loft??
I have had a read of the posts on here and there is a loft grow one that has a great design that im gonna use to build the room, so i want to take my time and invest some money in to doing the room/loft right from the start so no major probs with heat or cold come and bite me on the ass.
Im slightly disabled so getting it right now is a must,
Im fit enough to keep the room going and all that but building and stuff is a bit to much,
So i am gonna pay a friend to build it for me but i want to get some proper ideas of some top growers so he can just build what i tell him to,(well what u lot tell me)

here is what im gonna be growing with,It might make a difference in what advise/help u can give me on sorting my room and insulation out. I have an 8 pod flood/drain system, i got a 600w hps dimond shade and 2 spare 400w hps lights, but want to just use the 1 600 for now, i have got a light mover and im gonna set my bucket in 2 rows of 4 and just have the light moving about 6 or 7" eather side from the middle of rail. i would like to set up 2 600s if i can sort out keeping heat down!!! but will wait and see,
I have a 10" and 5" ruck fan plus a 4" carbon filter.
Any help/advise would be great, if u think i need to change and bits or buy diff bits then please let me no.
Without getting a violin out and telling u all my life story , (im at a stage in my life where i need to be getting things right and not learning by my mistakes , if needed i can borrow some money to get the loft right.)
Thanks in advance for any help given.
GOOD GROWING TO ALL AND MAY ARE BUDS TWINKEL WITH TRICS

RH, dont know much about your other plans but your filter looks like it will be too small for the 10"?
think your bettter with a bigger filter, whats the diameter on the 10" fan inlet, 5" or 6"s ?

have a look Here

Hi ya arai,
Thanks for replying,
Right i cannot get to my 10" fan yet as is stored away and i need a hand to get at it, (but will check the diameter asap)
What size C, filter should i be using with a 10" fan??
At the mo im just running my 5" fan with 4" filter on top of 4 3ft plants and its keeping smell down sweet.
But i will be going to 8 plants when in loft so Advise please on the size fan i should get,

Any advise at all on any of this post would be great, even if its to say my idea is c##p,
Knowledge is power and im lacking so please please help

the heat in the summer, even on a not so hot summer, will fry your plants, beware..

I use sheets of 25mm thick polystyrene for insulation mate. It comes in 8*4 sheets at your local builders merchants for about six or seven quid a throw. Sheet one side of it with a thin ply or similar, and Bob's your auntie.

he would have been your uncle if he had balls..

Post-op.

Hey nigfis,
Whats the temps like that u get in the summer?? Like the hottest and coldest
I no granddad is saying that the heat will fry the plants??? But if the room is built so the heat that gets in the loft from the sun cannot get in to the room the it should not matter what the temp is in the loft. (i have already put some spare loft insulation on the the roof rafters folowed by some ply board to try and keep the heat out that start with)

Look we all no heat is gonna be a problem in most lofts in the summer and thats why im asking for help/advise on how to deal with it

COME U STEALTH GROWERS OUT THERE, I GIVE U SAY £200 AND ASK U TO BUILD THE ROOM IM ON ABOUT IN FIRST POST.
THERE IS ABIT OF ROOM TO SPEND ABIT MORE MONEY IF NEEDED!!! (BUT WOULD STILL LIKE TO KEEP WELL WITHIN BUDGET IF POSS) I CAN SPOIL THE WIFE THEN FOR ALL THE STRESS I BEEN GIVING HER OVER TRYING TO SORT THIS OUT!!!

the stuff nigfis is on about is called JABLITE (flooring) it comes in 1 inch, 2 inch and i think maybe even 3 inch thicknesses.

where i bought mine from was a local builders merchants and they let me cut it there to fit it into the back of my car.

i think an 8 x 4 sheet of 1 inch thick was £5.99 (sorry it was a year ago, so memory is very hazy on the price, but i'm fairly sure i bought 3 sheets for under £20)

An insulated box to grow in willl be fine mate. Just make sure you can supply fresh air to it from outside and are able to vent the used air back outside. The temperature in the loft will have no bearing on what's going on in the box.

I use that foam sheet stuff in my loft for insulation. I just have it forming a sort of ceiling above the lights.
For the walls I have hung black and white plastic sheets - these worked really well - in the summer we just raised them allowing more fresh air to flow in from the eaves, and more space for the heat to disperse to, this meant we were able to keep temps to the mid thirties on the hottest days last summer, running 3 x 600hps.

Scary

Thanks for reply Dohped,
That JABLITE stuff is what i was told about in the chat box, It sounds like that will deffo be 1 form of insulation to use,
So i might use that as a filler to put inbetween the walls, but what to use for the?? chipboard/ply/ plaster board or hard board even??
Thanks for shout D
Im very greatfull

Hi scary,
Im a bit confused m8... when u say u used the foam for the roof of room and the black white sheeting for the walls!! Was that just the black/white hanging from the foam roof? was it sealead round bottom or any thing like that??
And with that style room u could keep the heat from the loft out of your room if it got to hot in the loft??
What size fans where u running??
The thing is i have been getting bit for this room for awhile now and have a big roll of black/white, a roll of that ADF foil and a roll of mylar, so i got all sorts of stuff to use if needed.
And as i have said that if i get any good feed back about that asto foil that has the bubble wrap inbetween a tough foil material i will buy some of that to put round/in the room? (be will see what peeps think about it),

And 1 last thing, the peeps who have tried the jiblite stuff could u let me no if u used any thing else with it and what sizes fans u where running.

Many thanks to all who have replyed .
But please dont stop there, Any advise at all about my plans or lack of, wrong equipment, I really do need to get this right,
Please spend 2 min and add a reply if u think it can help,
Any advise is good advise if u never heard it b4

Hey come on folks...
Please give me some feedback/input on what im tyring to do ,
I have read so many posts and got some great info and tips for me to use,
But no one has really said what kind of temps they been getting in the summer months!!! Because then i can try and deside whats the best insulation to use
I might just use all 2 or 3 that have been mentioned and that should REALLY stop any heat or cold getting in to the room .

Plus any advise on the other stuff i wrote about the room and equipment i have or not have and should get..
I cannot stress how much i need this help/advise..
I think i will go with boarding both sides of the studing and insulate inbetween, (unless im told a diff way!!) But as for what to put inbetween??????(still trying to find best thing to use)
And what do people think of that astro foil stuff im thinking about using???
OOOHHH so manys Q's.......
Also the fans and filter stuff... what size shouuld i be going for???

Thanks to all who have given a shout so far and many thanks in advance to anyone who can offer help on this post

PS
If there is any info or pics u want to help advise me then just shout and i wil get it asap.

Great growing to all and my we live long and prosper

Hi Robin Hood,

In summer you could easily get temps of 40-45 degrees centigrade in your loft and as Nigfis says providing you are bringing air in from a cool/shaded side of your house and venting back outside again under the eves and have sufficient insulation you can keep this from having too much of a bearing on your internal grow temps.
I used 12mm chipboard for the external skin built over a frame made from 44mm square batton, insulated with 2" rockwool and lined with hardboard with a final layer of mylar to finish up.

I lined the roof with the ally coated bubblewrap and I have to say it works a treat especially if it is as good as 50mm polystyrene as the manufacturers claim.
This is only my opinion but I think the 10" fan could be a bit over the top and will make serious noise....I'd use your 5" as an input and get a 6" for output to maintain a negative pressure which stops odors escaping through gaps etc. This should cope with a 600watt lamp.

In hindsight I would have considered using 2" cellotex or kingspan as walls as they are self supporting and well rigid and also very light which must always be a consideration in a loft but I suspect you'd still need a frame tho to support your lighting and filtration.
I also stuck a little unit on the side of my grow for Mums and bringing on cuts and seedlings which is 2.5ft x 1.5ft. This has a 4" hole in the bottom with a light baffle and a little 4" bathroom type fan in the top drawing air out through a light baffle from above the flouro lamp.
This means that warm air from the main grow is used to keep the Mum room warm.

All the best with it,

Bu.

insulate as best you can, wickes, 150mm thick rolls of loft insulation, 5.3m long, glassfibre but in a plastic shell with a reflective side, about £5 a roll, bargain, the better you insulate the less chance of being seen from above, people say its paranoia but where i live the choppers are often hovering about!!
you have to bear in mind that if its 28deg outside your loft then its gonna be a good few degrees hotter inside as there is limited air movement, so if your box isnt airtight your drawing in air at 30+degC, heating it with some big sodium lamps, you need an insulated (airtightish) box, a big extract to remove all the hot air from your room efficiently, and a way of controlling the temp of the air going in. But i have had some excellent product from a friends loft, in the middle of summer, with the blistering heat and only a 6in vortex extract fan, good luck

With all due respect to plantation if you don't have felt under your tiles as I don't you will better spend you money building a proper little cubicle which will act as a mini life support system whilst reducing the effects at the extreme ends of the temperature spectrum outside.

As my loft temps literally hit freezing point in winter and virtually 50 degrees in the summer what with the two hottest days in history being recorded within the last two years I had to build something more substantial.
As Plantation said insulation is the key along with good airflow through your grow and you will find you'll get away with a 600 watter easy in the winter and right through summer too if you get it right.

Don't forget there is always the option of a sealed aircooled hood and you can use it normally (better light output)or fit the glass and boot the fan up when things get hot.
When sealed with the fan blowing through my hood 34 degrees becomes 28 so they do work.

Bu.

Hey Bu,
I want to say a massize massize thanks for your reply,
Thats just the kind of help/advise im looking for I want to lean by other peoples mistakes and stuff they have done and found it to work great.
If u had the chance to use that cellotex would u have still boarded the outer part? even if it was with some ply board or sumit?? Or even sandwich it inbetween some plaster or chip board??
I think whatever i use for insulation im gonna build a frame first, cus as u say i will need it to suport the equipment i will have in there plus if i have a frame round the bottom i can make sure the cellotex is pushed up tight to the frame and it should help make the room air tight!!
Also that ally coated bubblewrap u said about? (is that the stuff i was going on about in the first post???)
If so where did u buy yours from.
And as for the 10" fan, i dont think i will be able to change that now as i brought it in advance for this room im planing to build ( i seen it cheap and did not need it at the time but wife let me get it cus i told her its what i will need for the room) So im gonna have to put it on some sort of dimmer so i can keep the speed down to atleast half or less, but then if i need i can wack it up if temp gets to much.
I will have to try and dull the sound down buy wrapping a pillow round it or sumit??(ANY IDEAS FOLKS??)

Im gonna draw air in from a room below as the temp in there stays cool as its at the back of house and the sun dont get round there much, and to vent out i was gonna use the eves like what im doing at the mo with my 5" fan, or i have a spare chimney flue that i can tap in to and let it go out that way??(AGAIN WHAT U LOT THINK?)
What size carbon filter should i use on a 10"?? I only got 8 plants so the smell should not be to bad!!

Big thanks again to everyone who has replyed to this post so far May your plants grow big fat and sticky

Keep any ideas/ advise and that coming please, i will get some pics of loft tonight and that might help abit more.

I have put some spare loft insulation across the beams of roof and fixed it there with some ply board that i screwed on top of it.
I have only got the back and top part of the roof done so far but i will do the front part asap,
If i get this astor foil i will stapel that to the beams and then even put some more loft insulation and ply again, cus in the summer its the front of the house that gets the sun most of the day, So if i can stop that getting in to the loft as much then that can only help to

But i total agree that if i build the room right with proper stuff and get the insulation right then the loft can be whatever temp and my room will not be affected,

So please keep the ideas coming on how to get the best insulated room

Thansk for reply plantation,
The way u explain the sun on your house is kind of the same for me,(by 4pm the sun is about on top of my house then by 6 or 7ish its round the back but its never as hot then) So that sound hopfull.

I also will go with lights on at night, as i do that at the mo and im only in a back bed room but it help with the cold temps we getting at the mo.

And as for your 10" fan, how loud is it when on full?? cus i want to do sumit like u explaining about the negative pressure, plus being able to turn fan up if heat gets to much in room.
What size carbon filter u got on that?? if u using one that is.

I was also thinking about having the 10" fan in the room instead of on the outer wall as it might hide the noise being in the room and all, (what u lot think?)

Thanks again plant,
Keep ideas/advise coming
And may we all grow green and sticky

Hey there plant,
wow u quick with the replying dude ,
Right the 2x2 constuction is what im thinking of using and then all it comes down to now is the best meterals for the job?? I have seen some rolls of that rockwool in plastic on offer at b&q, but the that cellotex stuff sounds good, i might use that and sandwich it.
Im hoping some more peeps who have done loft grows will tell me what they think and then i can work out what more people have had better results with in terms of keeping heat/cold out of the room built within the loft.
I own my home so i want this room to stay for a very long time, and if built right i can add another 600 at some point cus heat should not be an issue.

KEEP ADVISE COMING FOLKS

The advice you seek is within this Forum Just pull yer finger out and have a good read

Hi G,
I have and still am reading loads of posts on here, i have done a 17 pager that u doing at mo, plus numorous others,
I asked for help as each grow/build is or can be that bit different, plus im great at reading what to do and knowing what to do but as only 2 people no what i do its hard to find people who can offer advise to the Qs i ask, Sometimes i ask more for conformation that im doing it right than for the help itself (if that makes sence)
But as for the advise i seek!! yes there r post that say they r using this type of stuff or that type of stuff, but none that say 1 is better then the other..and thats what im trying to find out.
And then there is a Q or 2 about what size carbon filter is best for my fan and bits like that.
But again i can read what people have said about there grows but then im left with a few options and no 1 to ask whats the better option to go with.....

Sorry for G will end post now m8.

Good growing to all,

Feck! That is some reading


Yes, I'm still with you so far


You won't get a thread saying that one is better than the other because peeps will just use one or t'other, not a combination of different materials to insulate their loft with.


A 10" fan (wow) will fit a 10" filter. A 6" fan will fit a 6" filter. A 4" fan will, oh you get the drift You can get things called reducers that will enable you to have say a 6" filter fitted to a 5" fan or visa versa


Yep! We've all been there, and then there's info overload


No need to feel sorry for me mate I'm self-sufficient


Such a pleasant chap, do come again



Good growing to all,

Thanks for all the advise G it helped me loads that m8 .
So with a 10" fan u could not get a reducer and put a 6 or 8" on it?
Sorry for the stupid Q but for some reason i just presumed u could fit any fan to any filter with the right connetions ,
Cus for 8 plants is a 10" carbon filter not abit to much??.

And G its not just that i want peeps to say 1 item is better then the other, its just if more peeps said more good things about 1 product than another i could asume the 1 spoken about more highly would be the better all round!!! I was trying to get a rough idea from peoples past and present experiances on what they r using or have used and how they found it??
I did not see any harm in asking people to offer some advise on stuff they no and love.

Many many thanks to them who have replyed and offered help/advise

Great growing to all and may are buds be big and sticky

Hi there

Your area is about the same size as mine (but mine isn't in a loft!) & I use an RVK150L as an extractor & matching c/filter with a TD-350 intake & an RVK100 used as an extractor from my mum/baby room & as a 2nd intake for my flower room.

Growing in loft spaces can be tricky!

IMO you need to spend wisely on your insulation. Kingspan is probably the best stuff about (& seen it used to good effect) coupled with the reflective bubblewrap type insulation.

Your 10" fan may be overkill during the winter, but in summer you'll be glad of having it! Spend some cash on getting a c/filter to match your fan (but ensure it is re-fillable, unlike alot of cheap ones on the market!). I'd also consider getting a fan controller & couple it with a thermostat, the diagrams you can find using the search facility at the top of the page.

To quieten the 10" down, you can use acoustic ducting, this will cut the noise of the air rushing through the ducting considerably & I'd also think about mounting the fan on bungees & use a hell of alot of that silver bubblewrap shit to dampen down any residual noise.

The UK420 shop will sort you the best possible price for this & everything else you need for that matter. Don't forget to ask for 'cheeky fekker discount' (I live close to the growshop & give em hell every time I walk in the place )

hope this helps ya



dikki


edited to add a few bits!

hello rh

we are currently running a loft grow catering for 15 girls which was built entirely from 3 inch jablight screwed to existing joists and rafters.......we created a 6x5x5 grow space which is used entierly for flower purposes....we run an eight inch vortex extraction fan with passive intake(this baby runs at min and keeps us at a constant 27 dgrs with a 600 light)just finished new baffle box to house said baby cos she was keepin the neigbours awake at night ,what a diff......all for £15...vfm

hope this is of help to you

mossop

Hmm....

not the most ideal setup, soz but it isn't

For that floor area you should be running about 1500watts of light (at an average of 50w/ foot square). I think you only get away with your passive intake because of your lack of efficient lighting tbh.


RH, your lighting should come to a minimum of 900watt (@ 50w/ foot square) preferably mixed light... so I'd probably look at a 600HPS & a 400MH if I was in your position



dikki

Hi again m8


Just to top up my earlier post.

My black and white just hangs it's not sealed at the bottom, that was the original plan - but as usual I ended up kinda building some of the room around the plants, and this was my makeshift measure of reducing temperature quickly if needed, anyway the temps stayed just inside the healthy range except for a couple of days. The results were great - Lots of Lovely Green Spirit. On earlier less experienced grows I had let temps get too high and my plants really stretched and then proceeded to provide me with a reasonable pile of the worst weed ever. I guess I got what I deserved. During this winter the loft would have been cold if I hadn't spent a small fortune heating it. I have had a low of 14.9C and a high of 29 - ideally these two figures should be a lot closer, but touch wood, so far so good, 3 and a half weeks to go and my ladies look fiiiine!.

Extraction - it could be better - I have 4 x 4 inch bathroom fans ducted into my chimney, believe it or not the heat just pours out the other end, but this is next in line for improvement when I have some cash (bought 3 new 600 watt hps for this grow). My loft is huge and very airy and this certainly helps. I think the biggest problem with loft grows is temperature control and the best way to control the temperature is to have good airflow, so don't skimp, I just got lucky!.

I think you should consider that if you start growing today, you won't finish until May at the earliest, so you need to think about the heat as well as the cold, I think I would get as much insulation as I could afford and install it in such a way that it wasn't too big a pain in the arse to remove if I thought it would help. Get a good thermometer and keep a sharp eye on it - Maplins do a weather station thingy for about 15 quid - it has remote sensors so you could stick one in your loft and have the bit that tells the temperature downstairs. Watch the weather forecast everyday to reduce the chance of nasty surprises.

IMO The difference between a good grow and a bad grow is attention to detail.

Good Luck Dude


Scary

Dikki u a star
This is just the sort of feed back im after, im gonna put a plan together and put it up on here to see what u lot think?? Im also gonna take pics of the whole thing being built so it can help others like me, plus u all can tell me if im doing it wrong
I will have a look in the 420 shop and see if i can pick up the bits im gonna need,
Do they have a proper shop that u can go look round or is it just an internet shop?
And it looks like im gonna need to get a 10" C/filter to match this fan so it runs at its most efficent??
Thanks again for the advise and info, a few more like this and im sure i can make a room that will do me proud!!!!!!
Good growing to u dikki and all

Hey there T&M,
Thanks for the reply but just want to ask if u been through any summers with your room yet?? if so what was your highets/lowest temps??
And as for the baffel box.. have u got any plans for how u built it?? cus im not to good at building stuff but i got a m8 that is and im sure if i ask him nice enough he can make me sumit to go round this fan cus by what im hearing from peeps its gonna be very loud , ( i new i should have waited b4 getting that size fan....)
Thanks again m8,
Good growing to u all

Hey scary thanks for replying and letting me no how u got your room running,
I see u have grown green spirit, how was it??? I Hva e been growing mazar for about 2 years and i have just got some green spirit to try.
I got some skunk1# and some called golden skush, plus some free seeds i was given called pok or pot kushXwhite Giant, and some called south african durbanXskunk#1
So if anyone knows much about any of them strains then give us a shout.
I think im deffo gonna give the green spirit a try, but would like to try 1 other along side it so i get 2 diff strains at the end .

MASSIVE THANKS TO EVERYONE WHO HAS REPLYED TO MY POST TO OFFER HELP/ADVISE AND JUST SOME
INFO ON THE BEST WAY FOR ME TO BUILD THE ROOM A WANT.

Green Spirit - good yielder, been easy to grow so far, and usually ready in around 7 weeks, if u ain't too fussy.


Scary

Hi scary,
Good yieald is what i like and my maz is 56 to 60 days so 7 to 8 weeks is good enough for me.
and u got no realy probs with them?? how long u been using it??
I will look in to them othe beans more and see what they like..

Thanks again for the reply scary.
Be cool and stay well.

Im lovin the feed back u lot giving, im so glad i was told about this site, IT GOTTA BE THE BEST AROUND IM SURE
Keep it up and keep advise coming if its gonna help or just stear me on the right course.

sorry to go slightly off topic,

this is true but to be honest you don't know what yields he is getting. he could be growing some very fine herb with that setup, numbers arn't everything

Hey thats ture OCC, i would rather 5oz of super fine herb than 10 oz of just allright stuff ,
So if i do build my room 6ft long by 4ft wide and its about 7ft high if that matters?? what wattage will i be getting square ft?? i got a 600w hps that im gonna put on a light mover to move it about 5 to 6" either side from middle of rail, just so i cover the 2 end pods nicley.??

Thanks to all for your help/advise.
TOP BOYS AND GIRLS U ALL ARE

I also have a 10inch RVK which I plan to use in a loft grow to cool a 600w flower room and maybe a 250w veg room. I thought it would need a speed controller to keep the noise down, but this also had me thinking if I was pulling less air through the fan then I would need a smaller carbon filter as they are built to have air passed through them at a set m3 e.g. a four inch filter wants air passed through it at the set rate of an RVK100 at full speed.
Is my understanding of carbon filters wrong?
Could somebody clear this up for me please as carbon filters cost alot of money when you get to the larger end of the scale & I don't want to buy the wrong size(s)

Hello pal,

Seems like your sorted anyway but may as well add my two pennies worth!

I have a loft grow and I have had 2 summers up there. Ive used the bog standard fibreglass loft insulation in between two sheets of fibreboard and then put some mylar up. The bonus of this is that its dirt cheap. The I use a 5" RVk for extraction and 4" fan for drawing nice fresh air in. Im lucky enough to have a velux window so draw air from there. I extract to the other side of the loft through the gaps between the wall and roof. (its an old house!)

I still have to worry about summer temps a bit as if its 30 degrees outside, the air thats getting dragged in is already warm, plus the heat of the lamp, means temps get high. But the insulation does make all the difference and at least stabalizes the temps some what. And when flowering I make sure the lights are on overnight.

Its no work of art but the link in my sig shows my room put together. Its not huge, just growing 4 or 5 plants at a time but that gives me enough for my missus and I.

I love loft growing as although temps are sometimes something to worry about, its really only the height of summer when theres a real problem and for me its the least paranoid inducing. Have people come over and never have to keep them out of any rooms. As long as you hang the fans on bungee and I insulate the circulation fan, Ive never had a problem with noise.

Good luck pal, it WILL be very worthwhile. £200 sounds realistic too, its about what I spent.

I really cannot help u there m8 as im in need of some help about carbon filters to...
And u right about them getting pricey as the get bigger, I really thought u could put a much smaller size filter on a big fan, Well thats what i was banking on when i got my 10" fan, cus im only doing 8 plants i thought a 10"CF would be to much. But i wanted to get a big fan to deal with any heat probs that might pop up.
So does anyone no what would be the smalest size carbon filter that u could put on to a 10" fan? but still have both fan and filter working to there most effctivness??(if that makes sence??)
If i do need to use a 10" cf, what would be the best type to get??? AS im not gonna want to be buying a new 1 every years or so when the carbon is no longer working (but saying that im not sure how long a normal carbon filter should last???) I might need to look in to getting one that can be refilled so i can keep the filter for as long as poss.
Does anyone no how much it costs to buy carbon or get it refilled by someone else (like a grow shop if they do it)

[quote]
'LGV' date='Feb 17 2006, 03:49 PM' post='510911']
Hello pal,
Seems like your sorted anyway but may as well add my two pennies worth!
[/quote]

Hi ya LGV,
Well im not sure i would say sorted but im getting there i think??

[quote]
I have a loft grow and I have had 2 summers up there. Ive used the bog standard fibreglass loft insulation in between two sheets of fibreboard and then put some mylar up. The bonus of this is that its dirt cheap. The I use a 5" RVk for extraction and 4" fan for drawing nice fresh air in. Im lucky enough to have a velux window so draw air from there. I extract to the other side of the loft through the gaps between the wall and roof. (its an old house!)[quote]

Im glad its working for u m8 , i have got my idea of how im gonna get the room built form ideas off your post and other loft grow post i been reading,
I just want to make sure i use the best stuff i can get and nail the heat/cold that gets in to the loft so it dont get in to my room.

[/quote]
I still have to worry about summer temps a bit as if its 30 degrees outside, the air thats getting dragged in is already warm, plus the heat of the lamp, means temps get high. But the insulation does make all the difference and at least stabalizes the temps some what. And when flowering I make sure the lights are on overnight.[quote]

You say the temp gets to 30c in summer when using the air from outside! but if u closed that window and pulled air from a cooler room below due u think u could keep the temp down even more in that room??
Also would u say that the way u have done to your room keeps enough of the heat that enters your loft in the summer out??
If u could would u change anything about it to make it better if poss??

[quote]
Its no work of art but the link in my sig shows my room put together. Its not huge, just growing 4 or 5 plants at a time but that gives me enough for my missus and I. [quote]

Had a good read of it m8 and loads of others, its given me some more ideas to think about.
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I love loft growing as although temps are sometimes something to worry about, its really only the height of summer when theres a real problem and for me its the least paranoid inducing. Have people come over and never have to keep them out of any rooms. As long as you hang the fans on bungee and I insulate the circulation fan, Ive never had a problem with noise.
Good luck pal, it WILL be very worthwhile. £200 sounds realistic too, its about what I spent.
[/quote]

I cannot wait to get up in to the loft as im using a growtent in my back room at the mo and i hate trying to keep people out of there,
Would u hang the fan inside or out side the room? i was thinking inside as it might help to hide the noise if what im hearing about this fan being loud is true? or if i fit it to the outer sied of the wall i can try and wrap stuff round the fan itself to try and dull the noise??(what type of fan is a circulation fan??? sorry is that a stupid Q)
Many many thanks for the reply, and i hope with the help and advise for some top growers like yourself and the others that have replyed i will be able to build a room that will withstand the heat/cold of the loft, be able to extract the heat from a 600w bulb?? maybe 2 600s cus that will give me a much better yeild, but for now 1 600 on a light mover, And keep the enviroment as close as poss to what it needs to be
Not asking much that hey (im willing to put the money in for a good room that will last many years.

Peace for now, but keep growing strong and sticky buds

A circulating fan is a fan that circulates the air within the grow rather than extracting(Oscillating desktop fan)and is really essential!
For a 10" extraction fan, as G said earlier you will need a 10" filter if you want to run the fan at full potential...These filters really do create a terrific amout of drag for the fans and the 10"er is big and expensive.
You could put the fan inside the grow if you have room but they do work better with a length of ducting each side rather than the fan being open and a 10" filter and a metre of duct then your 10" fan is going to take up a fair bit of room in the top of your grow!

Bu

hi ya bu,
Thanks again for the reply, i thought it was an osillating fan he was on about
Right so a 10" fan it is then.
Do u think i should stick with this 10"?? is seems it might be causeing me probs now??
MMMMM will see what the grow shop i go to says!!!
Thanks again.
Oh has anyone heard of or tried an insulator called - Tri iso super 9 ?? if any builders about could u tell me if this stuff is as good as it looks??? cus if i did use kingspan and some of that ally coated bubble wrap for my insulation it would cost me just as much to buy a big roll of this super 9 stuff, and i could just use it on its own if it is as good as it says??? build a frame and staple it to it and theres my room??? What u lot think??

Hi im just in middle of building the room in a loft,
The room size is 2m/6ft 7" wide by 2.3m/7ft 7 long and will be about 2m/6ft 7 hight,
The system im using is 8 pot in 2 rows of 4,(so they cover about 70cm/2ft 7 by 1.7m/5ft 7 of floor space with nothing in. They cover about 1m wide when in flower.
The thing is im not to sure if the room is abit to big for the system i got?,
As it stands if i put the system in the middle of the room it will give me about 2.2ft each side of the system and about 30cm each end.
I have a 600w hps dimond shade at the mo and i also have a 10" plus 5" inline rvk fan.
Oh and a light mover.
What im not sure about is should i get a smaller fan cus i was told a 10" might be a bit much?? and to maybe get an 8" for outlet and use the 5"for inlet??
And will a 600w be enough to give me enough proper light coverage??
Im was thinking of putting the light mover right above but in the middle of the 2 rows of buckets, and the light in middle of the rail the will just move it about 5 or 6" eather side so the 2 buckets at each end of system get just as much light as the 4 right under the light??
If i did go to an 8" fan would that be enough if i added say another 4 or 600w hps?? if i find that a 600 on its own is not enough (well or even just to get dubble the light in there cus that would help boost the crop size im sure!!!
How does that sound???? Please offer any advise if it will help,
Thanks in advance,
If any more info is needed then shout and i wil reply asap.

Ps
Im gonna try and add a pic of i have done to try and show what i mean.
Not sure if it will help??
And can anyone tell me where if there is a good place to put my in and outlet fans?
(Its not letting me add pic?? so will try again later, or is there a prob with adding pics at the mo??its just a scaned pic that i saved as bmp i think? but its just not being added when i go to add this attachment )
Anyway all advise welcome.

Keep it mean and keep it green

just trying to put up pic i sketched of new room