On my first grow and growing in an unfinished basement. I plan on making a cradle for my tent to sit in out of 1/2 plywood and an R-10 styrofoam insulation board. How do you deal with the cold floors? Any better ideas?
Thanks for your help.
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Raise stuff up off the floors, that rigid insulation board will work great.
Better yet a 2" dead air space then the insulation board.
Heated ceramic tile is fuckin marvelous.
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My no-till beds are on casters to keep them off the floor and make them mobile both. @Subcool (RIP) has suggested horse stall mats in the past.
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I’ve put down rigid foam and then a layer of 3/4 plywood covering that. Glued and screwed into place with tapcons across about 1/2 of my space. Awesome, as long as you don’t have major flooding concerns.
I’m also using rubber (horse) stall matts and have a tent sitting on those. More portable. Also a nice option and not too expensive. They are about 3/4 inch thick. They also have 1/2 inch thick, too. They are heavy and won’t move around on their own or from foot traffic. No worries about those getting wet.
https://www.tractorsupply.com/tsc/product/utility-rubber-mat-black-4-ft-x-3-ft-x--frac12-in-1011848
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I built a rack system off the floor with pvc pipe and wire shelving in one tent.
In my 4 x 4 I put a piece of foam board between the floor of the tent and the removable tray bottom
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In the 4 x 8 tent with the racking, the bottom of the pots are warmer then they were.
The 4 x 4 plants are not as cold either.
I may add some foam board under tray in the big tent, then put the rack system back, then add the rack system to the 4 x 4.
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I like that idea. Between the foam board and the air gap, I bet it would make a big diff.
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Check out your local hospital pharmacies they always get shit with stryrofoam insulation boards that’s thick I put my worms bins on them in The winter in the garage! There about 2-2.5 inches thick.
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Even cardboard boxes flattened down will work nice flat edges take it up to the edge of the tent !
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All these are good – the objective is eliminating thermal conductivity 
& some skinny wood “furring” strips between the concrete and the insulating layer(s) would complete the package. 
elevate as much as possible 
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I put mine up on those concrete deck blocks. They hold up a frame of 2x4s with a plywood floor. I think you can get plastic smaller ones they use for fences too.
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There will be a huge difference
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Huge difference
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Pallets - you can find them for free all over your town.
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i would use cement board instead of plywood over extruded polystyrene. Cardboard invites pests and mold
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Lots of great ideas posted in here. The main thing is to raise the pots off the floor. The air temp in your tent will do the rest. There was a time I used my old plastic pots flipped upside down with the cloth pots I now use on top.
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I thought cold floors were desirable? I’ve always thought that the low/mid 60s or so was an ideal root zone/floor temp? It just dawned on me that cold floors for a lot of the country might be really cold…
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