Polyisocyanurate or extruded polystyrene for in ground use?

strider3700 · 11-24-10, 06:16 PM

I just came across this link
solar Photo Gallery by Eric at pbase.com

He dug a hole lined it with extruded polystyrene (pink) added a liner to make the inside water tight and covered it over.

I haven't mentioned that my tank will be just outside of my house. I can place the tank on a gravel bed that can drain directly down into my perimeter drain to help remove standing water. If I wrap the polyiso with some thick poly and am careful when back filling not to rip it it would be water tight except for whatever comes from above which is relatively easy to deal with. I'd be more worried about trapping vapor leaking from the tank at that point. Also I can back fill completely with gravel to create quick and easy channels for water to drain down to the perimeter drains.

11-24-10, 06:16 PM	#11
strider3700 Master EcoRenovator Join Date: Dec 2008 Location: Vancouver Island BC Posts: 745 Thanks: 23 Thanked 37 Times in 30 Posts	I just came across this link solar Photo Gallery by Eric at pbase.com He dug a hole lined it with extruded polystyrene (pink) added a liner to make the inside water tight and covered it over. I haven't mentioned that my tank will be just outside of my house. I can place the tank on a gravel bed that can drain directly down into my perimeter drain to help remove standing water. If I wrap the polyiso with some thick poly and am careful when back filling not to rip it it would be water tight except for whatever comes from above which is relatively easy to deal with. I'd be more worried about trapping vapor leaking from the tank at that point. Also I can back fill completely with gravel to create quick and easy channels for water to drain down to the perimeter drains. Last edited by strider3700; 11-26-10 at 12:39 PM.. Reason: removing possibly incorrect acronymns