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Water seepage in basement and crawl spaces usually occurs over long periods of time and can be caused by numerous factors. Concrete is one of the most commonly used materials in home construction. When pockets of air are not removed during construction, or the mixture is not allowed to cure properly, the concrete can crack, which allows water ...
A slab-on-grade or basement floor should be poured over a cross-laminated polyethylene vapor barrier over 4 inches (10 cm) of granular fill to prevent wicking of moisture from the ground and radon gas incursion. Inside a steel building, water vapor will condense whenever it comes into contact with a surface that is below the dew point temperature.
Damp proofing in construction is a type of moisture control applied to building walls and floors to prevent moisture from passing into the interior spaces. Dampness problems are among the most frequent problems encountered in residences. DPC visible between concrete foundation and brickwork.
A crawl space or crawlspace is an unoccupied, unfinished, narrow space within a building, between the ground and the first (or ground) floor. The crawl space is so named because there is typically only enough room to crawl rather than stand; anything larger than about 1 to 1.5 metres (3 ft 3 in to 4 ft 11 in) and beneath the ground floor would ...
Vapor retarders are materials that can be used to restrain uncontrolled airflow and water vapor into an indoor space. [15] Vapor retarders are used to decrease the rate and amount of water vapor diffusion through ceilings, walls, and floors caused by humidity. [ 15 ]
One common rule is to provide vents in cross sectional area equal to 1/150 of the floor area served. [8] Modern crawl space thinking has reconsidered the usage of crawl space vents in the home. [9] [10] While crawl space vents do allow outside air to ventilate into the home, the ability of that air to dry out the crawl space is debatable. [11]
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