The survey came back with a report of spray insulation foam in the attic and stated that most lenders don't like this stuff. So why isn’t spray-foam always the go-to insulation? Applying an even sheet of foam to the underside of a roof or other space can eliminate the routes that water vapor uses to leave the house. At Foamroof, our own employed team of roofing experts can solve your roof repairs and install spray foam loft insulation for you and households in Southern England. Acute temperatures in uninsulated, ventilated attics impact comfort and energy efficiency in living spaces below. Regardless of the climate, you should opt for closed-cell spray foam for roof insulation. The method is also extremely quick and easy for a professional team of insulation specialists to install. Homes insulated with it can be some of the most efficient and comfortable homes built. Properties with single skin brickwork where the single skin comprises more than 20% of the surface of the external walls. ft.) will be sufficient. Spray Foam Insulation within Roofs Does it work? Downsides of spray foam insulation. Many people believe that the only solution is to completely strip and re-lay the roof in order to prevent these problems happening again, but they’re wrong. The foam never gets touched and never loses R-value. Since a spray foam system consists of spray foam, coating, and granules, after 10-20 years, some of the coating and granules will naturally wear away. Is Spray foam good enough for high performance air sealing? From there, it accumulates and eventually rots the roof. Injection foam must expand slowly to reduce pressure. A spray foam roof can be the last roofing system you’ll ever need on a building. It has been said that insulating with spray foam insulation at the roof line will lead to moisture problems with the roof sheathing. Incorrectly installed spray foam insulation can trap moisture in the home, encouraging rot and mold problems. Spray foam even sticks to wet surfaces, the moisture just helps cure the spray foam. If you were to add a fiberglass insulation product to your walls or the roof, then you would not gain a structural integrity benefit. Installation: Spray foam is often installed incorrectly, leaving gaps or holes, which reduces its performance. Due to spray foam insulation being such an upcoming method of insulation, there have been quite a few misconceptions about the effectiveness and dangers of its use. There you have it. Polyurethane or polystyrene spray foams can provide thorough coverage to roof rafters and attic walls in much less time than is needed for other materials. In open-cell foam, the blowing agent gas is not trapped by the forming cells that are not completely closed but are broken, and the small spaces within the foam are filled with air. Spray foam insulation and what do Surveyors think. Does Your Spray Foam Insulation Need a Thermal or Ignition Barrier? Spray Foam Insulation - Roof Undercoating Advice Sand-lime mortar reinforced with animal hair was applied to the backs of tiles and slates for hundreds of years before roofing underlay was invented. Beware of Roofers in Homes with Spray Foam Insulation. With spray foam insulation you can get maximum thermal efficiency benefits, which can really address the heat escaping from the roof and, therefore, saving your money on your energy bills. Related Articles. It is made by mixing and reacting unique liquid components at the job site to create foam… Icynene® open cell spray foam will not rot your roof! The sound barrier efficiency of this product option is quite low as well. Unlike solid insulation products that require careful measurement, cutting and fitting, spray foam can cover even the most uneven surface instantly. Spray foam insulation is extremely popular because of its superior R value.. Spray Foam Insulation Effect on a Shingle Roof. Spray foam insulation can be grouped into two different types: open cell and closed cell.