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Cement boards may be classified as water resistant as they are not affected by water exposure; however, they do allow penetration and passage of water and water vapor. To waterproof cement boards, a liquid or membrane waterproofing material is applied over its surface. Cement boards should not be confused with gypsum core backer boards.
Each version of magnesia board needs to be installed using the manufacturer's recommendations to avoid installation problems. Most often the boards are produced by using Sorel cement (Magnesium oxychloride), resulting in a slightly hygroscopic product that can produce a problem called "crying boards" when applied in too humid climate. Example ...
Waterproofing conducted on the exterior of a freeway tunnel. Waterproofing is the process of making an object, person or structure waterproof or water-resistant so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions.
Waterproofing a structure from the exterior is the only method the U.S. International Building Code (IBC) recognizes as adequate to prevent structural damage caused by water intrusion. Waterproofing an existing basement begins with excavating to the bottom sides of the footings. Once excavated, the walls are then power washed and allowed to dry.
Waterproof is defined by the ASTM as a treatment that resists the passage of water under pressure. [1] Generally, damp proofing keeps exterior moisture from entering a building; vapor barriers , a separate category, keep interior moisture from getting into walls.
The house has central heating and air conditioning, a natural gas fireplace and ample closet space. And yet, modern amenities aside, this is no normal home.
That’s also why Uniqlo’s knit cap gets PureWow’s vote for best kids’ hat. It’s currently $8, and it features the brand’s HeatTech construction, so it’s designed to retain warmth ...
In time it became a generic term for other companies' similar asbestos-cement products, and later an even more generic term for a hard, fireproof composite material, fibre cement boards, typically used in wall construction. It can also be found in insulation, siding, roof gutters, and cement wallboard. The more prevalent transite found in wall ...