Thermal Insulation Foil Roll R Value

However we see claims of up to r 14 for some bubble products.

Thermal insulation foil roll r value.

Lower u values mean better thermal performance. Most brands of insulation have a u value displayed on their products as a matter of pride. The u value is a simple measure of how easily heat is able to pass through a material. Standard insulation is tested as a material with an r value per inch of thickness for example r 13 for 3 5 quot.

If you read the fine print this rating is always achieved as part of an overall assembly which usually includes a lot of dead air spaces. Bubble foil does offer some r value because of the bubbles because remember radiant barrier does not have an r value on its own. Note from this chart that the ideal r value differs for each part of your home. R value up to 15 67 with one layer up to 20 10 with two layers.

4 7 out of 5 stars 590 29 88 29 88. Double bubble reflective foil insulation. U value of foil insulation. In addition to the standard fibreglass insulation roll buyers can choose rolls with acoustic dampening properties fire resistance or where space is limited use reflective foil rolls with a great r value that have less depth and are slimmer than standard fibreglass rolls.

Insulation companies who make metallic bubble wrap or their distributors like to boast about their products attributes and often add the equivalent reflective r values to the conductive values giving an overall equivalent r value. Some products say r4 r6 or r8. Typical fibreglass insulation for example requires 270mm of insulation to get to a u value. From the research i have done a k 19 value equals an r 5 6.

Of owens corning fiberglass and r 5 per inch with foamular foam board. A simulated wall with 2x4 studs dry wall an air space and layer of reflectix. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed your attic to reach r 30 if you live in zones 2 or 3. Vapor barrier prevents condensation unaffected by humidity and moisture mold resistant can be used outdoor indoor.

48 in x 10 ft roll industrial strength commercial grade no tear radiant barrier wrap for weatherproofing attics windows garages rv s ducts more. Foils do not use r values as you state but they do use a k value which can be converted into r value just like kwh can be converted into btus. I use a foil backed insulation which is way better than just regular insulation. Sound barrier excellent sound deadener material.

It s highly possible for a thinner reflective material to provide better thermal performance than a thicker non reflective product even though the thicker product will have a higher r value.