Foil Board Insulation R Value

What is the r value or r rating of radiant barrier foil insulation.

Foil board insulation r value.

Each sheet is created with different r value ratings. The r value is in essence the measurement of an insulation sheet s ability to resist heat flow. Working with home insulation boards insulation panels typically come in 4x8 foot sheets. Most people are familiar with the term r value when discussing insulation properties.

Basically r values range from 1 5 to 7 and the higher the number is the more effective the insulation sheet is at increasing thermal efficiency and thereby insulating your home. Products with foil facing help the panels resist moisture vapor. An r value is a measure of an insulation product s resistance to thermal heat transfer. Smaller sizes are also available.

Added r value is what the foilboard insulation panel combined with the adjacent still reflective airspaces adds to a particular system. The actual amount of airspace adjacent to the material will have a profound impact on the r value the larger the space the higher the r value. The foil facing also makes it very easy to seal with good quality foil faced tapes. The r value rating is essentially a gauge on how effective the insulation is at preventing heat conduction.

This testing to designate an r value only applies to conductive heat flow not radiant heat flow. The reflective foil facing makes it an excellent insulation board when radiant heat is involved. Thickness inches r value in i p imperial rsi r value in metric 0 5. At foilboard we create high quality foil insulation with various foilboard r value ratings.

R value is a term to describe how quickly heat will pass through or be absorbed by a product. Note from this chart that the ideal r value differs for each part of your home. They re much lighter and easier to work with than plywood sheets. It s a measure of how long it takes a heat absorbing product to absorb 100 of its potential and begin to transfer that heat out the other side of the product.

The reflective surface of foil insulation takes heat and reflects it back out denying its entry into your premises. R value chart for enerfoil tm rigid foam faced insulation. Conditioned per atsm c1289 test method astm c5181 2. Polyiso is typically used with a foil facing and it has an r value of 7 0 to 8 0 per inch of thickness.