Spring, Texas -- Because hurricanes cause an estimated $10 billion in damages every year, the 2010 Florida residential building code requires strict performance standards for building products to endure high winds.
Closed cell (CC) spray-applied polyurethane foam (SPF) products Bayseal CC and Bayseal CC X from Bayer MaterialScience llc recently received approval under these stringent Florida Building Code wind uplift requirements.
As tested by an accredited third party laboratory, these SPF materials had a design uplift resistance of 190 lb/sq.ft. This is the highest possible rated resistance by the test apparatus.
BMS's materials meet the Florida requirements when applied as only a fillet at the junction of the roof deck and along both sides of the roof rafter/truss top chords. The SPF types also qualify for homeowner insurance discounts -- depending on insurance company criteria and the building authority having local jurisdiction.
"It's important to note that this approval for Bayseal Closed Cell SPF applies specifically to the roof assembly," said Jose Luna, technology manager, Bayer MaterialScience Spray Insulation and Roofing Materials, in a company statement.
"Using Bayseal Closed Cell as insulation in the walls provides additional structural strength due to the monolithic sealing nature of the product. This sealing capability also helps reduce air leakage and makes homes more energy efficient."
These SPFs are also naturally resistant to water, reducing the risk of mould growth within the wall cavity as a result of moisture infiltration, said Luna.
BMS says closed cell SPF is recognised by FEMA (the US Federal Emergency Management Authority) as a secondary water barrier for Gulf Coast construction.