Polystyrene R Value Chart

There are other factors to consider. Values at yield or 10% defl ection, whichever occurs fi rst.

Types Of Low-Slope Roof Thermal Insulation - Ccpia

The amount of insulation you need depends mainly on the climate you live in.

Polystyrene r value chart. The polystyrene foam styrofoam is made of trapped air bubbles that prevent heat energy from flowing through it. Expanded polystyrene insulation is similar to the foam used for packing “peanuts” and it’s typically used for insulated concrete forms also knows as icf’s. Expanded polystyrene foam (eps) is the cheapest and least used foam board product on the market.

This product typically has an r value of 3.6 to 4.0 per inch of thickness. These values may not be accurate for your building material. 4 to 6.5 per inch of thickness.

27* grey polystyrene (graphite) eps. ‘r’ stands for thermal resistance. Astm c578 physical properties of eps;

Tiny air particles trapped in the insulating material resist the movement of heat (and cold). Xps comes unfaced or with a number of different plastic facings. Consult your manufacturer for more accurate data if required.

Extruded polystyrene foam (xps) 4.5 to 5.0 per inch of thickness. Our r value guide to rigid insulation includes the doe's recommended insulation by zone chart, r value calculator and base building material r values chart. Expanded polystyrene foam (eps) 3.6 to 4.0 per inch of thickness.

It is very important to. Polyisocyanurate (iso) 7.0 to 8.0 per inch of thickness. Closed cell polystyrene spray foam (1 inch thick) 6.5:

•used most in walls or below grade applications. Extruded polystyrene (xps) •easily recognized by its blue, green, or pink color. “r” means resistance to heat fl ow.

It absorbs little water (4%) and comes in a variety of vapor permeances. As you can see, r values of rigid insulation are higher while spray foam r value is lower. 5 rows rigid foam insulation r value chart polystyrene (expanded and extruded).

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Expanded Polystyrene -Eps- Rigid Foam Insulation

R-Value

Building Science-R-Value – Northern Built

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