For a very good introductory overview article on r value see r values over at the website of.
R value concrete roof tiles.
Thermal break foam strips gasket 10mm thick uncompressed.
R value is compressed value thermomass concrete insulation concrete panels 150 conc 50mm xps foam 60 conc thermomass concrete insulation concrete panels 150 conc 70mm xps foam 60 conc tile clay roofing 19mm.
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.
There are many websites on the internet which have imperial building material r value numbers but not so many with metric r value numbers.
The following table is in metric form.
Timber floor boards kiln dried hardwood 19mm.
R values of uninsulated concrete.
John wiley sons inc 2006.
As we said before the r value measures the thermal resistance of a material.
For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15.
You should of course see the manufacturer provided technical data sheet for the r value of specific products.
The tractile eclipse roof tiles contain natural insulation with an r value of 0 05 while the tractile eclipse solar tile provides 7 x greater insulation than concrete tiles with an r value of 2 00.
R value of various materials.
Energy and the environment.
Tile slate 8mm.