The International Energy Conservation Code determines the energy-efficiency requirements for commercial building roofs. The minimum requirement for insulation installed entirely above the roof deck is R-25 for Climate Zone 3, R-30 for Climate Zone 5.
Is TPO a Class A roof?
Fire-Rated, Class A – Both TPO and EPDM membranes are Class A fire-resistant. ... While in contrast, EDPM is often black because of the membrane's natural color and its retention of the sun's rays. Savings with TPO. Single-ply membrane roofing has become one of the top roofing materials for most commercial facilities.
Is TPO a vapor barrier?
It is relatively inexpensive and will protect the insulation against the interior vapor, but it does not count as an air barrier. Though it comes at a higher cost, the better option is a fully adhered vapor barrier, which typically consists of 40 mil self-adhering membranes.2016-07-14
What is the required R-value for a roof?
Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. See the Department of Energy's (DOE) ranges for recommended levels of insulation below.
What R-value do you need for a roof?
Depending on where you live and the part of your home you're insulating (walls, crawlspace, attic, etc.), you'll need a different R-Value. Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces.