hi there, 2day was the big build of my first growbox ,120cmsquare by 210cm tall. got tha shell down and will finish hopefully 2morrow. ive got a 400w hps wit cooltube, carbon filter and rvk fan. im hopein 2 get 4 to 6 plants in there comfortably, any coments or suggestions would be helpfull. just plannin on putin a thin outer shell on it made of mdf. also what sort of realistic yeild should i be lookin at for that sort of size, im gonna be growin white widow and white rhino, cheers some pics of tha build...

im planing on the shell being only on 3 sides with an open front closed in with plastic sheet, do i need reflective material on the door aswell ? ta

Can you come and build me one?

Hehe - sorry - that's not very helpful.. you are doing the exact same dimensions as my ideal box. I am tempted to buy a budbox type thing (well actually it will be a 'contra' deal) - but am still tempted to build...

WRT the door - yes - it would be best to make that reflective too.

Yields - well I grew 3 plants under 400w HPS with manual/passive hydro in a much smaller drobe and got 12 OZ from 3xBlack Domina...

thanks 4 tha reply utokia, the wood costs peanuts build ur own n ave fun

Hi Phil,

I built a growbox very similar a few months ago, turned out better than expected. That frame part was the hardest, having no joinery skills i had to rely on hard as nails and screws, no reinforcements. Luckily the shell secured everything- i opted for a slide-door, a slighlty shorter panel that sits on the wooden frame in old drawer runners.
make the inside as reflective as possible.
My frame looked nowhere as solid as that mate.
Nice wood-work

cheers 'G Bud' there will b more happening 2morrow n ill keep postin progress

bye the way will 400w hps be sufficient or would i be better upgradeing to a 600whps, im useing the 400w for veg and flower is this gonna be ok?

i reckon you could go up to a 600hps seeing as your using a cool tube
check here
http://www.uk420.com/growroomtools2.php

and is veggin outdoors n flowering in doors bad ?

i wouldn't, think off all the bugs you could bring inside

nice grow room by the way

whats the best reflective material? think im gonna go black n white plastic sheeting

has anyone had any problems with it it?

dude don't use MDF, formaldahyde(spell) is used to make it, and can leak out slowly (aparantly) get plywood, its stronger and doesn't contain ( to my knowledge) nasty chemicals.

Looks pretty impresive tho, i think im going to be building something similar myself in a couple o months

best of luck

diamond reflective is the best but mylar comes a close 2nd apparantly , just lined my room with mylar, looks really great and cheap to buy as well
http://www.hydro2005.co.uk/index.php?cPath...abeda049bac0773

a 1m2 room only cost me £8 plus p&p

i'm sure i read somewhere that Ot1 mentioned not to use chipboard either cos of the chemicals used to glue it together.......ply seems best,

i'm using thermal insulation board.....plasterboard with poltstyrene on 1 side......seems ok

ive just got the ceiling and first 2 sides up now can i get anymore feed back about mdf plz pannels are completly sealed with no mdf showing at all only the wood skeleton, will this make a difference. cheers

heres some pics of the work done today.... only a phone cam will get a new one in the next few days, let me know what u think.....

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im hopein for about 9 plants in there what do ya think,will they be comfortable enough ?

oh and havent decided on what intake fan im gonna use any thoughts on a cheap 1 or do ya think simply a vent
wit a fan inside will be enough cheers

still cant find nothin on internet about the mdf pannels being good or bad any help would be great remember there sealed wit plastic only skeleton showin, cheers

also ive had 3 crops outdoors but this is 1st indoors so off 9 plants what kind of yeild do ya think im gonna get being a newbie ?

yeah but ply wood is binded 2gether wit a glue isnt it why is it so bad 4 mdf ??????

any suggesions as i want to crack on wit this build later 2 day ta

I must admit to having used MDF alot myself.
I am sure that plywood now to uses either phenol or urea-formaldehyde as part of or all of it's bonding agent.
This is simply because of it's strength and moisture resitance.

They all now, as far as I am aware, have some form of formaldehyde emmisions

The real problem with working with any of these types of materials is the dust created when cutting and sanding.
MDF in particular, seems to produce an almost finer than talcum powder type dust. Probably due to it's man made fiberous nature.
Make sure whatever you use, it's cut either outside or in a well ventilated space, and ensure that you use a quality mask or better still a respirator.
I always use respirators with exchangeable filters. They are only about £8 or £9. Worth the investment I feel.

As well as having just started my own home grown, I am about to start a project making a Mame cabinet.
I was going to use MDF. I have decided to go with ply. For me it was an appropriate material that was easier to finish for this type of job.

Whatever you use, assuming you are not permanently encasing yourself in the stuff, it shouldn't be too problematic.

Hiya philcanaries ,

I would buy a pair of them rolling hangers to keep up your cooltube as they are well easy to adjust the height of the light and pretty cheap. I hated using metal chain so nosy .
Great looking grow room dude puts mine to shame keep up the good work.

mrm

Unless you're planning on erecting shelfs or leaning on the walls I'd just use whatever reflective sheeting you buy as 'walls', less building work/expense and it can be taken down much faster if needed.

Looking sweet so far bud.

Agreed. My own two tent frames are surrounded only by lightproof plastic sheeting and Diamond reflective inside.

By the way forgot to mention earlier, excellent build so far.

cheers 4 the reply CrashAndBurn, ive stuck with the mdf but the final peice of equipment i need i think is the intake fan , as funds are now at a low i was thinking of simply a cheap extractor fan to blow air in. as im living n spain the only worry 4 me is if the room gets to hot but temps in the room are only around min 24c and high 27c so thats ok. i figure if my rvk is suckin out and blowing through a widow and a low speed fan is blowin air in straight from the room with the window open i should b ok , any suggestions?

hi Minitrkn420, thanks 4 tha reply and everyone else that has guided me in this build well ive just about finished the growbox 2day and have enjoyed every hour ive spent makin it im just buzzin at how its all gone and cant wait to go get my seeds 2morrow and get this show on tha road. heres some photos of tha progress cheers,

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temps are 28c lights on and 27c llights off do u think im gonna need 2 cool the room anymore? cheers

in spain so high temps are my main concern

thats around my temps & ive had no problems , humidity it aroung 55-60% but im doing hydro , room looks good , good luck with the grow

cheers 'BIG~G' but do ya think the small intake fan is gonna b good enogh. i was glad when i plugged it all in and the front screen sucked in a little bit but not to much, got a good vacuum goin on in there i thinks

Nice Job. If you get the chance, it would be nice to see this followed up as a 'grow diary' when you start to put those beauties in there.
I shall keep an eye out for it. Don't forget, plenty of pictures. Good luck!

cheers 'CrashAndBurn' , a grow diary is certainly gonna follow. at the moment ive 2 white widow that were planted 15/5 so there only 10 days old but im thinking of just usein them as mothers and get 2 other strains growing 3 plants from each strain totalin 9 plants with 6 plants grown straight from seed and remaining 3 from the white widow cuttings.trouble is the local grow shop on the island are waitin 4 new seed delivery so cant do nothin till monday but good news is there gettin a few new strains ,1 called icecream, from a company i cant remember so i will be spoilt 4 choice im sure any suggestions on high yeilding plants would be a bonus.the pics will be rollin in when theres more goin on but everythin is set and ready to go ta

oh and im gonna b useing plagron royalty mix, any users of this had good results or any comments?

and whens the best time to start feedin after 2 or 4 weeks

the room's lookin the goods pal

Ive recently just built my own room with virtually the same dimensions except I'm only at 6ft high. It seems like a good size to play with but I could really do with another foot like you have. Im going for scrog next grow to keep the height down.
I made my room in 6 seperate panels so i just make a big box and screw it all together (I rent my house so its gotta be easy to pull down and move) I used masonite where you went mdf because its much lighter (3mm thick) plus the fact it comes already made with one flat white side to the sheet. Ive only attempted one grow in this room but both were boys so that was short lived

Im looking forward to seeing your room at its full potential to compare methods

keep it sticky

MD

hi philcarnies, i know a grower with a very similar grow room used insulation board,like kingspan, its thick foam with a silver foilish outer layer, he just cut it into shape and pinned to wood he said its great, lazy arse here bought a budbox they are brill

did you say that was your first grow room, well my hat goes off to you buddy as that is one fat grow room cant wait to see the progress

thats looks wicked and ive been thinkin along them lines; not long b4 i start to build it . just a lil q how much did it cost 2 build thanks

hi thanks 4 tha reply, its only cost me around 70euros to build the box just waitin on tha seeds now but as ive said ive got a white widow in there now 12 days old n she absolutly loves it in her new home got a new camera finally so heres a few better pics,cheers 4 all ur comments

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This may seem like a stoopid question, but why is the ducting supported on both sides of the light?

for the vacuum of air

just seen some marks on the leaves of the white widow does any1 know what this might b ? cheers