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buffalobillpatrick · 12-01-14, 10:40 AM

JRMichler, I agree 100%

Also in cold climate, if radiant in-floor heating is used, the "standard" 2" of blueboard XPS under slab is WAY UNDER INSULATED

On my next house, I will use 6" of EPS in field & 10" around perimiter.

I have a neighbor who just sold his house in my development. He did maninenance on heating systems on large expensive homes in Vail Colorado.

Even though he claimed to know everything about radiant systems, I'm sure he was just a "grunt" who cleaned out boilers etc. & didn't know squat about design.

When he built his house, he didn't put ANY insulation under radiant walkout basement slab!

When he 1st tried to heat the walkout basement the boiler ran for 3 days pouring heat into cold ground. When the room air thermostat was finally satisfied, the temperature kept climbing up to about 85*F After that he never heated that level of house.

12-01-14, 10:40 AM	#13
buffalobillpatrick Master EcoRenovator Join Date: Mar 2014 Location: Florissant, Colorado Posts: 599 Thanks: 814 Thanked 59 Times in 55 Posts	JRMichler, I agree 100% Also in cold climate, if radiant in-floor heating is used, the "standard" 2" of blueboard XPS under slab is WAY UNDER INSULATED On my next house, I will use 6" of EPS in field & 10" around perimiter. I have a neighbor who just sold his house in my development. He did maninenance on heating systems on large expensive homes in Vail Colorado. Even though he claimed to know everything about radiant systems, I'm sure he was just a "grunt" who cleaned out boilers etc. & didn't know squat about design. When he built his house, he didn't put ANY insulation under radiant walkout basement slab! When he 1st tried to heat the walkout basement the boiler ran for 3 days pouring heat into cold ground. When the room air thermostat was finally satisfied, the temperature kept climbing up to about 85F After that he never heated that level of house. Last edited by buffalobillpatrick; 12-01-14 at 11:02 AM..*