R Value Of Lightweight Insulating Concrete Roof

R3 r18 r21 total roof r value.

R value of lightweight insulating concrete roof.

I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number. 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. The largest single use for lwic is as a roofing base and thermal insulation for industrial and commercial buildings with low slope roofs. The expanded p r oduct weighs from 6 to 10 pounds per cubic foot.

This process provides fire protection prevents air infiltration and bonds the total insulation system to the substrate. Since 1985 cellucrete corp has been applying lightweight insulating concrete for roof decks structural concrete engineered fill applications and floor fill installations. To view the downloaded files you will need the free adobe acrobat reader. 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. Unlike rigid board siplast lightweight insulating concrete is reroofable and therefore a truly sustainable insulation solution. The increase r21 r3 exactly 18 the value by which you are increasing the r value. To assist the designer manufacturers publish tables of insulation values for various thicknesses or combination of materials used in roof insulation.

Each design encapsulates the insulation board in insulating concrete. Siplast lightweight insulating concrete systems january 2012. 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. R value or when a sloped system is installed that the insulation meet an average r value.

There are several benefits for the use of lightweight concrete on current roof applications. Hol e board specifications r values and compliances for vented expanded polystyrene insulation for all lightweight concrete roof decks. 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. Cellucrete has established itself as the leader in the lightweight insulating concrete industry with a proven track record of high quality installations throughout the.

A g g r egate of great value for fill and insulating concre t e.