R 38 Rigid Roof Insulation

I m designing a house with a cathedral ceiling with exposed structural beams with structural decking above and then rigid foam insulation above the decking.

R 38 rigid roof insulation.

Depending on the type of insulation you choose and the desired r value you want for your facility you may need to build up a few layers of insulation. Where do i find out how thick my. All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. This type of rigid foam usually comes with a reflective foil facing on both sides so it can also serve as a radiant barrier.

Knauf insulation r 38 ecobatt kraft faced high density fiberglass insulation batt 10 1 4 in. Per the 2012 virginia residential code table n1102 1 1 i know that i need to have r 38 roof insulation. R value measures how well certain building insulation materials can resist heat. Let s use the r value of iko s polyiso insulation enerfoil tm as an example.

Most insulation manufacturers will first list their insulation s r value for a one inch sample then they ll give you a chart demonstrating the other r values you can achieve if you install a thicker version of their product. Sized for proper ventilation r 38c ecotouch thermal batt insulation is designed to eliminate r value loss caused by compressing standard r 38 products in 2x12 cathedral ceiling construction. The r value is a measurement of the heat loss and heat gain. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency.

R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems. 10 thick r 38c ecotouch thermal batt insulation prevents moisture damage and help assure long roof life by providing 1 of ventilation air space between the insulation and roof deck. The higher the r value the greater the insulation performance. When choosing rigid foam insulation you have three main options.

Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and. Known as polyiso for short polyisocyanurate foam has the highest r value per inch r 6 5 to r 6 8 of any rigid insulation. Foamular xps roof insulation for commercial buildings page 5 foamular xps roof insulation for commercial buildings foamular xps insulation is a rigid foam insulation which meets the needs of today s design professionals for a truly sustainable insulation product. When determining how much insulation you need don t guesstimate calculate.

When it comes to insulation performance the difference is in the details.