R Value Of Rubber Roofing

R value is used in the united states.

R value of rubber roofing.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. Click here to go to our calculator to understand the real r value of a ceiling system or wall system with gaps in the insulation. To convert rsi to r value multiply the rsi by 5 67826. R value of building materials material r inch r thick ness fiberglass inch 3 00 1 inch 4 00 inch 6 00.

Rsi r value système international is the metric equivalent. When determining how much insulation you need don t guesstimate calculate. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. Expanded polystyrene eps with the highest r value per dollar eps is used for roof wall and floor insulation.

As we said before the r value measures the thermal resistance of a material. For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15. The higher the r value the greater the insulation performance. There are many websites on the internet which have imperial building material r value numbers but not so many with metric r value numbers.

Rubber pad 1 23 roofing materials asphalt shingles 0 44 wood shingles 0 97 windows single glass 0 91 w storm 2 00 double insulating glass inch air space. Ft sbs self adhering cap sheet roll for low slope roofing in slate model 3730750 101 02 roll 101 02 roll free delivery. The average r value is r 5. Xps is semipermeable with a perm rating of 1.

See the department of energy s doe ranges for recommended levels of insulation below. 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. Additional r value for a masonry wall constructed using these materials needs to add the insulating value of additional wall components typically included such as 1 solid foam polyisocyanurate r 8 extruded polystyrene r 5 expanded polystyrene r 4 or 1 of perlite r 2 7 and for an exterior air film winter no wind r 0 17 an interior. R value measures how well certain building insulation materials can resist heat.

Eps can be used for ground contact and does not retain water over time. 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. The following table is in metric form. Gaf liberty 3 ft.

Know exactly how much you need with our project calculators. The average cost of extruded polystyrene insulation is 0 42 sq ft.