Minimum Roof R Value For Tapered Insulation

The standard tapered panel size is 4 x 4.

Minimum roof r value for tapered insulation.

Slope cross sections published feb. Find out why in the seller s fact sheet on r values. You should of course see the manufacturer provided technical data sheet for the r value of specific products. The r values shown above are the minimum r values required to meet code requirements.

For a very good introductory overview article on r value see r values over at the website of. Since a tapered insulation system will increase thickness away from the low points the overall system r value will. It is readily available in the two most popular and efficient tapers 1 8 3 18 mm per foot 305 mm 1 and 1 4 6 35 mm per foot 3 18 mm 2. Minimum insulation r value requirements non residential above roof deck.

Thermapink tapered roof insulation provides a thermally effi cient moisture resistant positive drainage slope for use under single ply or other types of roofi ng systems. R value of various materials. State applicable energy ashrae zone minimum r value state local ms mississippi ashrae 90 1 2010 2 r 20 3 r 20 state local mo missouri 2012 iecc 4 r 25 5 r 25 state only mt montana 2012 iecc 6 r 30. Standard material is johns manville enrgy 3 tapered and flat polyisocyanurate roof insulation.

Higher r values mean greater insulating power. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. How does this affect r values on a tapered insulation system. The goal of tapered roof insulation systems is to eliminate ponding standing water on a membrane when the roof deck does not provide adequate slope.

When correctly installed tapered insulation helps eliminate problems due to ponding water and can extend the longevity of your low slope roofing system. View document share this post. A properly designed tapered roof insulation system not only provides the necessary r value and the support for the roof system but it helps extend the. R 20ci r 25ci r 25ci r 30ci r 30ci r 30ci r 35ci r 35ci question.