Standing Seam Metal Roof R Value

Sri measures the roof s ability to reject solar heat defined such that a standard black reflectance 0 05 emittance 0 90 is 0 and a standard white reflectance 0 80 emittance 0 90 is 100.

Standing seam metal roof r value. Incorporates both solar reflectance and thermal emissivity in a single value. You should of course see the manufacturer provided technical data sheet for the r value of specific products. The insulated metal faced composite panel must be made from. Lttr is a 15 year time weighted method based on customer s insulation needs.

The cfr exterior profile has a 2 inch high standing seam with a mesa profile. Contemporary metal roofing has a 50 year rated. The cfr panel is attached to a building structure with concealed clips to provide continuous insulation and eliminate thermal bridges providing unsurpassed weathertight performance. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.

The per square foot cost of a premium metal roof is 9 58 with a comparable asphalt shingled roof s march 2012 per square foot cost being 3 41. Higher cost one of the most significant drawbacks to standing seam metal roofing is the fact that is can be more expensive when compared to other metal roofing types especially exposed fastener systems. However it s not always the highest price as metal shingles and other stamped metal materials tend to come in at a higher price even. The interior profile is also a stucco embossed mesa pattern.

For a very good introductory overview article on r value see r values over at the website of. The use of berridge manufacturing metal. Thermal performance is measured using derivative of the r value known as the long term thermal resistance lttr method. Colonial seam continuous standing seam metal roof panel with an integral seam.

18 roofing standing seam on insulated metal faced panels skin must provide a minimum pull out value of 50kn for the standing seam fixing clip dynamic testing method. Available values range from 5 6 to 27 3.