Minimum Roof R Value For Tapered Insulation

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.

Minimum roof r value for tapered insulation.

The standard tapered panel size is 4 x 4. The r values shown above are the minimum r values required to meet code requirements. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Since a tapered insulation system will increase thickness away from the low points the overall system r value will.

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. 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. Tapered roof insulation systems are designed to provide a 1 savings vary. Standard material is johns manville enrgy 3 tapered and flat polyisocyanurate roof insulation.

View document share this post. Minimum insulation r value requirements non residential above roof deck. R 20ci r 25ci r 25ci r 30ci r 30ci r 30ci r 35ci r 35ci question. R value of various materials.

This bulletin presents the theory and calculation methods used to develop tables of effective r values for tapered insulation. One area where effective u values are commonly misunderstood is tapered insulation for low slope roofs or at the eaves of sloped roofs. For a very good introductory overview article on r value see r values over at the website of. When correctly installed tapered insulation helps eliminate problems due to ponding water and can extend the longevity of your low slope roofing system.

How does this affect r values on a tapered insulation system. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Slope cross sections published feb. Higher r values mean greater insulating power.