R Value Of Rubber Roofing

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.

R value of rubber roofing.

When determining how much insulation you need don t guesstimate calculate. R value of building materials material r inch r thick ness fiberglass inch 3 00 1 inch 4 00 inch 6 00. R value measures how well certain building insulation materials can resist heat. The following table is in metric form.

Expanded polystyrene eps with the highest r value per dollar eps is used for roof wall and floor insulation. To convert rsi to r value multiply the rsi by 5 67826. Know exactly how much you need with our project calculators. Ft sbs self adhering cap sheet roll for low slope roofing in slate model 3730750 101 02 roll 101 02 roll free delivery.

See the department of energy s doe ranges for recommended levels of insulation below. Set your store to see local availability add to cart. 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. Eps can be used for ground contact and does not retain water over time.

There are many websites on the internet which have imperial building material r value numbers but not so many with metric r value numbers. Rsi r value système international is the metric equivalent. As we said before the r value measures the thermal resistance of a material. 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.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. The average cost of extruded polystyrene insulation is 0 42 sq ft. R value is used in the united states. Xps is semipermeable with a perm rating of 1.

For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. Coverage white fiberglass mineral surfaced cap roll roofing. The higher the r value the greater the insulation performance. 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.

For a 1 in thick panel. 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.