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Keene Building Envelope Products

Keene Building Envelope Products

There are two major rainscreen design types that are usually used—a field built drainage plane or a drainage mat. The drainage plane and drainage mat products attempt to fill the same role which is the elimination of entrapped moisture from the building envelope through the creation of a permanent, predictable space between the veneer and the backup wall. Unlike our neighbor to the north, Canada, most US state and local building codes do not mandate the use of best practices which always incorporates a rainscreen system. In those instances where a rainscreen is used in residential construction, the method of choice in the Northeast US appears to be the drainage mat. The benefits of using a rainscreen drainage mat are many: • They provide drainage of excess moisture and ventilation all in one product • They help keep the siding and entire wall cavity dry • Rainscreen drainage mates are lightweight and easy to handle • Most drainage mats are made from a polymer core that are resistant to most known corrosive chemicals, including solvents • They do not absorb or release moisture • Rainscreens are not a source for the promotion of mold, mildew or bacteria. Boston Cedar has two of the most popular drainage mats in stock and ready for immediate delivery: Driwall™ Rainscreen 020-1 Thickness 0.25 Inches / 6 mm DriwalI™ Rainscreen is a drainage mat for exterior wall systems.

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