TPO is slightly more expensive than EPDM. EPDM usually costs anywhere between $1 to $4 per square foot. By contrast, TPO costs between $1.5 and $5 per square foot, which is slightly more expensive (these are material costs, not including labor). Regarding labor cost, TPO also costs more...
Inland Coatings Corporation 单层EPDM和TPO塑料系统规格说明书
Felt roof underlayment costs 5 cents to 10 cents per square foot. Q:Synthetic Underlayment Weight Vs. Mil Thickness A:Non adhesive synthetic roofing underlayment isn't created equally. There are lots of high quality synthetic roof underlayment brands , bu...