Flat roofs are a common roofing choice for contemporary and modern homes. While they’re easier to install, especially over large surfaces, flat roofs do have their quirks. While many homeowners are aware of their unique pitch and drainage needs, few know that flat roofs have different insulation needs, too.
In this post, Roof Masters discusses the three most common insulation types for flat roofs.
Wood Fiber
This is an organic alternative and is made from pure organic wood fibers that are made into wood boards through fillers and binding materials. It has a modest water tolerance, which is further enhanced by painting a thin layer of asphalt on the boards.
Most roofers agree that this insulation isn’t always best for all situations. It’s not a good choice if you live in a humid or rain-prone area as the insulation can easily be damaged by a leak. That said, it’s inexpensive and reliable so long as it gets regular care and maintenance.
Perlite
This is a kind of glass made from volcanic ashes that have been pressed and refined, and combined with organic fibers and binders into a board. It boasts the same thermal resistance as wood fiber and is around the same price as well.
How it insulates the flat roof is unique compared to other insulation. Perlite traps air bubbles inside it, and these are what create the insulation for the roof. Like wood fiber, it’s also painted with asphalt to increase its moisture absorption and tolerance.
Polyisocyanurate
With an R-value of 6.0, this is the best insulation for flat roofs. It is produced as a foam and is unique in that its R-value further increases as it thickens. This insulation is placed between organic and non-organic felt. It boasts excellent energy-conserving qualities and can have a positive impact on a homeowner’s long-term energy consumption. On top of that, it can also extend the service life of the flat roof, thanks to its high R-value and efficient insulating properties.
These are just three of the many insulation types available for flat roofs. As your local roofing company, Roof Masters will help you pick the best one for your home. Call us today at (888) 889-7551 to learn more about our services. We are local roofers in Rockville, MD.