Roof Tile R Value

Remember the horizontal or vertical orientation of the material is important to get its insulation value correct.

Roof tile r value.

Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. These are all us r values. Tile clay roofing 19mm. Thermomass concrete insulation concrete panels 150 conc 70mm xps foam 60 conc.

R3 r18 r21 total roof r value. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Please note that the r values for roof membranes shingles tiles air films and roof deck materials might or might not be permitted by your local code to be included when total roof assembly r value is being calculated for the purpose of satisfying energy code requirements. The added r value equates to the effective annual thermal resistance for the tile roof having different combinations of surface radiation properties cool color pigments and or building constructions.

The increase r21 r3 exactly 18 the value by which you are increasing the r value. If you are starting with an un insulated space it is very important to read the section below titled estimating r values for un insulated spaces note. Total r values are based on the sum of all components of the building system including indoor and outdoor air films building materials used in the system and air spaces. Calculate percent improvement in r value.

Always check with your local code authority. There are many websites on the internet which have imperial building material r value numbers but not so many with metric r value numbers. To convert rsi to r value multiply the rsi by 5 67826. R value is compressed value.

Add the results for all the materials together to get the total r value for the roof assembly. Thermomass concrete insulation concrete panels 150 conc 50mm xps foam 60 conc. To calculate the total r value of a roof assembly find the total thickness in inches of each type of insulating material within the system. The r value calculator is best used as follows.

To convert to si r values multiply by 0 176. The following table is in metric form. Total r value r value means the thermal resistance m2k w of a material calculated by dividing the thickness by its thermal conductivity. For example us r10 si r 1 76.

Click here to go to our calculator to understand the real r value of a ceiling system or wall system with gaps in the insulation. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. What r value do i need. Work out all the different materials and surfaces that make up the wall ceiling or surface you want to work out the r values and u values for.

Thermal break foam strips gasket 10mm thick uncompressed.