Budget Grow Tent Build - under £35!!!

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I would like to share with you my recent build: A bespoke grow tent. Now, if I had a suitably-sized small closet or under-the-stairs cupboard, then I'd simply clear it out, give it a couple of coats of white Matt paint and it'd be good to go. That's the easiest and cheapest solution, and it's tried-and tested and known to be an effective setting for your grow.

I set out to build a grow tent with the least amount of money I could. I settled on 20mm PVC piping with 3-way corner bend pieces to act as a frame and reflective white Mylar plastic sheeting to skin it, so to speak.
Bill of Materials (BOM):
  • 20mm PVC Piping. Toolstation sell 3m Lengths for £1.80 each. I bought 4pcs for £7.20.
  • 3-Way Corner Bend. Amazon lists a 10-pk (inc. P&P) for £11.20.
  • Reflective Material - Mylar. White on once side, black on the other and reasonably thick sheeting. eBay lists (with free shipping) a 2m x 5m size sheet for just £9.95. It was delivered on a meter-long cardboard roll a day or so after ordering. The alternative to simple white Mylar is to use the diamond mirrored stuff, although it does incur additional costs. It's around £25 for a 1.2m x 5m sheet, but it does provide superior reflectivity over plain white Mylar or white Matt paint. Whatever you do, DON'T use aluminium foil - It reflects very poorly and is just dreadful stuff to work with.
  • Type-A & -B magnetic strip with adhesive backing. 5m for ~£6 from eBay.
Total: £7.20 + £11.20 + £9.95 + £6 = £34.35.

I decided on a footprint of 0.75m-squared and ~1.5m in height. For these dimensions I required only 4 3m-lengths of PVC pipe: two I'd cut into four pieces of equal length - 0.75m, and the other two I'd cut in two to provide the four 1.5m vertical pieces. I used a hacksaw to perform the required cuts.
Assembly was extremely straight-forward and quick to complete. Using a pair of sharp scissors, I cut the Mylar into two 0.75m-squared pieces and affixed these onto the top and bottom of my tent using sticky tape. I then used a large complete piece of Mylar to wrap fully around the tent, leaving an opening at the front where the two pieces meet. I used stick tape all around the sides and back, sticking it to the PVC pipe. I used magnetic strip on the top, bottom and vertical of the 'door', which keeps it nicely closed. I stuck an old PC fan into the bottom-left 'wall' to act as an air inlet.

I hope somebody might find this useful.

Best of luck,

CC
 

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I would like to share with you my recent build: A bespoke grow tent. Now, if I had a suitably-sized small closet or under-the-stairs cupboard, then I'd simply clear it out, give it a couple of coats of white Matt paint and it'd be good to go. That's the easiest and cheapest solution, and it's tried-and tested and known to be an effective setting for your grow.

I set out to build a grow tent with the least amount of money I could. I settled on 20mm PVC piping with 3-way corner bend pieces to act as a frame and reflective white Mylar plastic sheeting to skin it, so to speak.
Bill of Materials (BOM):
  • 20mm PVC Piping. Toolstation sell 3m Lengths for £1.80 each. I bought 4pcs for £7.20.
  • 3-Way Corner Bend. Amazon lists a 10-pk (inc. P&P) for £11.20.
  • Reflective Material - Mylar. White on once side, black on the other and reasonably thick sheeting. eBay lists (with free shipping) a 2m x 5m size sheet for just £9.95. It was delivered on a meter-long cardboard roll a day or so after ordering. The alternative to simple white Mylar is to use the diamond mirrored stuff, although it does incur additional costs. It's around £25 for a 1.2m x 5m sheet, but it does provide superior reflectivity over plain white Mylar or white Matt paint. Whatever you do, DON'T use aluminium foil - It reflects very poorly and is just dreadful stuff to work with.
  • Type-A & -B magnetic strip with adhesive backing. 5m for ~£6 from eBay.
Total: £7.20 + £11.20 + £9.95 + £6 = £34.35.

I decided on a footprint of 0.75m-squared and ~1.5m in height. For these dimensions I required only 4 3m-lengths of PVC pipe: two I'd cut into four pieces of equal length - 0.75m, and the other two I'd cut in two to provide the four 1.5m vertical pieces. I used a hacksaw to perform the required cuts.
Assembly was extremely straight-forward and quick to complete. Using a pair of sharp scissors, I cut the Mylar into two 0.75m-squared pieces and affixed these onto the top and bottom of my tent using sticky tape. I then used a large complete piece of Mylar to wrap fully around the tent, leaving an opening at the front where the two pieces meet. I used stick tape all around the sides and back, sticking it to the PVC pipe. I used magnetic strip on the top, bottom and vertical of the 'door', which keeps it nicely closed. I stuck an old PC fan into the bottom-left 'wall' to act as an air inlet.

I hope somebody might find this useful.

Best of luck,

CC
Wow I love this build and as you said it may help others but later down the road there going to start to smell as I see your a UK grower like myself so bear that in mind and nice to meet you bro I'm tom
 
Great starting position to get you going. I think that any sort of decent extraction would stretch that cover pretty quickly, and as St tom said, you will need that.

I would think about adding some side bars to go across & help support the build material.
 
The tent's actually surprisingly stable and stiff. I have 6 large CFL bulbs, 3 COB LEDs on chunky copper and aluminium heat sinks with fans, all mounted on a plywood frame (it's not light by any means) held up by two ratchet cords which handles me tugging pretty hard on it. Sure, some triangulation in the structure would really strengthen it, but I couldn't find any suitable corner bend pieces. It could be done easily by anybody proficient with a Dremel-like rotary multitool and a pot of PVC cement. I have a collection of old PC parts that always come in handy: ATX cases, fans, heat sinks and PSU's providing high power 12VDC and 5VDC - great for powering LEDs. To power the 3 heat sink fans I have, I've used an AC to DC "power brick" adapter outputting 12V up to 1A. I have the fans running on their LOW speed setting (by tying together the two wires other than V+ (oft. red) and GND (oft. black), so an amp's enough.

As for a decent extraction system stretching the cost, check this possible implementation:

Airvent 100mm In-line Shower Extractor Fan Kit Standard - £24.00

88876.jpg


eBay - DIY ACTIVATED CARBON IMPREGNATED FOAM FILTER SHEET - 12mm THICK (18" x 12") - £8.49

Total = £32.49

It makes me wonder whether it would be feasible to assemble a usable set up for under £100 - that's the tent, the extraction system and lighting. Pots too. So all that's left is to just add seeds, water and electricity! It's a challenge that I think would be possible if a bit of recycling and freecycling is exploited

CC
 
These are my homemade lights:
4x 35W 8200K CFL
2x 30W 2700K CFL
2x 50W Full Spectrum 'blurple' COB LEDs
1x 100W Full Spectrum 'blurple' COB LED
-------------------
Tot: 400W

IMG_20210507_130637.jpg


It's cost me £37.19 for the lights and £8.40 for the 6 CFL bulb holders (B22 'bayonet' type). Total: £45.59.
I'm unsure of the quality of the spectrum that these give, but I've tried to provide a broad range. I've heard that warm white LEDs are effective. I'm not a huge fan of blurple ones as it's diffficult to inspect under. I tend to switch them off when I do want to have a perusal. The CFLs run very cool but the LEDs do generate a degree of heat - because they're high power - and without heat sinking they rapidly exceed 100°C. It's certainly possible to employ only passive heat sinking - relying solely on conduction and radiation, but I feel more at ease with fans running and working to force the warm air away. They don't generate too much ambient temperature; it's typically around 25-28°C during the daytime of a hot day. I have my grow tent in the loft which is well insulated and doesn't have a skylight or opening, so it can get quite warm. It's essential to have a flow of air about your plants. Without it, you can expect molds to set in and insects to amble in. In an sealed, enclosed space like a grow tent, air can become stale and depleted of CO2. Plants, like most living creatures, don't at all like being deprived of a necessity as vital as air.

CC
 
Absolutely class home build set up brother.. id be very proud of that.. great job.. a bit of extraction/airflow will help but thats a great start.. the possibilities are endless really with the frame/tubing.. bespoke/custom size and shape grow tents are possible :jointman: brilliant!! Thanks for sharing this.
 
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