Rigid Foam Insulation Fire Rating

You can even place it under the foundation slab.

Rigid foam insulation fire rating. Facings and maximum flame spread and smoke ratings for the foam core 11 some metal faced polyurethane and polyisocyanurate laminated panels may be exempt. Thermax sheathing is a nonstructural rigid board insulation with a glass fiber infused polyisocyanurate foam core laminated between 1 0 mil smooth reflective aluminum faces. This foam board insulation is available with straight or tongue and groove edges to help limit air movement. Icynene spray foam insulation products have the flame spread and smoke developed indexes required have been tested in accordance with and comply with the acceptance criteria of nfpa 285 and there are many wall and ceiling assemblies that contain icynene products and are fire resistance rated in accordance with astm e 119.

I ve written several posts about how to insulation basement walls in which i promote the use of foam board insulation as the first line of defense against moisture and mold. The glass fiber reinforcement provides improved fire performance and dimensional stability. Foam board insulation types. Its thermal conductivity has a typical value of 0 16 btu in hr ft 2 f 0 023 w m k depending on the perimeter area ratio.

Because of this i often get questions about which type of foam board insulation to use and what r values these products provide. They keep your home at a comfortable temperature without the need to crank your heat. Rigid foam insulation also known as insulating boards provide high r values. Rigid insulation is one of the best tools to reduce your energy costs.

Fire safety guidelines for use of rigid polyurethane and polyisocyanurate foam insulation in building construction. Since most fire codes call for a minimum of half hour fire rating over foam insulations paneling would probably not provide a sufficient fire barrier over the foam insulating board. New 1 2 inch drywall is usually called for and in some installations fire rated drywall or thicker drywall may be required for local codes and for certain. And suppliers of foam insulation products for specific recommendations.

This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Thermax sheathing can be installed exposed to the. There are three basic foam insulation board products on the. Pir is typically produced as a foam and used as rigid thermal insulation.

Thermax sheathing specially designed to hold a class a fire rating. Icynene is committed. Exterior of wall with furring strips on top to form a vented rain screen behind siding. Exterior of roof with furring strips on top to form a vented roof plain interior of roof to form an air tight vent baffle a less traditional approach but a possible retrofit.

Install it anywhere from the roof to the foundation. It is denser than eps and provides more r value with a rating of 5 per inch of thickness.