R Value Of Lightweight Insulating Concrete Roof

R3 r18 r21 total roof r value.

R value of lightweight insulating concrete roof.

The largest single use for lwic is as a roofing base and thermal insulation for industrial and commercial buildings with low slope roofs. 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. Cellucrete has established itself as the leader in the lightweight insulating concrete industry with a proven track record of high quality installations throughout the. Unlike rigid board siplast lightweight insulating concrete is reroofable and therefore a truly sustainable insulation solution.

The r value of the insulating concrete depends on its unit weight and thickness. Lightweight insulated concrete also known as lwic is a material intended for use as an insulation and substrate for support and attachment of roofing membranes on slope roofs the lwic systems are composed of either aggregate or cellular concrete. I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number. R value or when a sloped system is installed that the insulation meet an average r value.

Each design encapsulates the insulation board in insulating concrete. In simple terms r values measure the effectiveness of insulation and a higher number represents more effective insulation. The expanded p r oduct weighs from 6 to 10 pounds per cubic foot. Hol e board specifications r values and compliances for vented expanded polystyrene insulation for all lightweight concrete roof decks.

There are several benefits for the use of lightweight concrete on current roof applications. Siplast lightweight insulating concrete systems january 2012. This process provides fire protection prevents air infiltration and bonds the total insulation system to the substrate. The percentage increase increase increase original number 100.

To assist the designer manufacturers publish tables of insulation values for various thicknesses or combination of materials used in roof insulation. To view the downloaded files you will need the free adobe acrobat reader. 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. When provided with insulation a thermal r value of r 30 can be easily achieved without insulation delamination warping or attachment concerns.

Since 1985 cellucrete corp has been applying lightweight insulating concrete for roof decks structural concrete engineered fill applications and floor fill installations.