FortiFlash 40 is a Class I, self-bonding, waterproof, vapor retarder membrane with self-sealing properties. It is ideally suited for use under floating or mechanically fastened wood panel subfloors under hardwood, carpet, laminate or resilient floors. It is a two-part material with an SBS modified asphalt base layer and a high strength, cross laminated, high density polymer film. It is a premium Class I vapor retarder and moisture barrier for wood floors installed over concrete slabs, at an economical price compared to other moisture control solutions.
It performs in a manner similar to the traditional asphalt-felt-asphalt waterproofing systems of the past, without the mess, extra labor and time involved with those installation materials. FortiFlash 40 can be installed around protrusions and into the tightest corners without delaminating or tearing.
Square Footage Calculator
Use this handy calculator to estimate the number of rolls you’ll need for your project. Please understand that your actual requirements may vary from the calculation based on your specific project details and lap allowances.