R Value Of Lightweight Insulating Concrete Roof

The percentage increase increase increase original number 100.

R value of lightweight insulating concrete roof.

Siplast lightweight insulating concrete systems january 2012. Cellucrete has established itself as the leader in the lightweight insulating concrete industry with a proven track record of high quality installations throughout the. R3 r18 r21 total roof r value. Since 1985 cellucrete corp has been applying lightweight insulating concrete for roof decks structural concrete engineered fill applications and floor fill installations.

A g g r egate of great value for fill and insulating concre t e. To assist the designer manufacturers publish tables of insulation values for various thicknesses or combination of materials used in roof insulation. Hol e board specifications r values and compliances for vented expanded polystyrene insulation for all lightweight concrete roof decks. When provided with insulation a thermal r value of r 30 can be easily achieved without insulation delamination warping or attachment concerns.

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 bag in which the perlite or vermiculite is purchased recommends the mix proportions needed to achieve various unit weights of fresh concrete and oven dry concrete. This process provides fire protection prevents air infiltration and bonds the total insulation system to the substrate. I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number.

Unlike rigid board siplast lightweight insulating concrete is reroofable and therefore a truly sustainable insulation solution. Each design encapsulates the insulation board in insulating concrete. To view the downloaded files you will need the free adobe acrobat reader. Ve r miculite insulating concrete is made of expanded ve r miculite ag g re g a t e air e n t r aining admixture p o r tland cement and water all mixed and applied according to pre cise pro c e d u re s.

The increase r21 r3 exactly 18 the value by which you are increasing the r value. In simple terms r values measure the effectiveness of insulation and a higher number represents more effective insulation. The largest single use for lwic is as a roofing base and thermal insulation for industrial and commercial buildings with low slope roofs. The r value of the insulating concrete depends on its unit weight and thickness.

The expanded p r oduct weighs from 6 to 10 pounds per cubic foot.