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Peeling paint: Water seeping through walls may lead to bubbling or peeling paint along basement walls. [4] Efflorescence: White, powdery residue found on basement walls near the floor. Mold: Fungi that usually grow in damp, dark areas and can cause respiratory problems after prolonged exposure.
Interstitial condensation is a type of condensation that may occur within an enclosed wall, roof or floor cavity structure, which can create dampening. When moisture -laden air at dew point temperature penetrates inside a cavity of the structure, it condenses into liquid water on that surface.
Epoxy moisture control systems are chemical barriers that are used to prevent moisture damage to flooring. Excessive moisture vapor emissions in concrete slabs can mean significant, expensive damage to a flooring installation. Hundreds of millions of dollars are spent annually just in the United States to correct moisture-related problems in ...
A metal damp proof course (DPC) between the stone foundation and brick wall. 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.
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.
Water vapor commonly condenses on surfaces cooler than the moisture-laden air, enabling mold to flourish. [citation needed] This moisture vapor passes through walls and ceilings, typically condensing during the winter in climates with a long heating season. Floors over crawl spaces and basements, without vapor barriers or with dirt floors, are ...
The District of Columbia defines "lead-based paint" as any "paint, surface coating that contains lead equal to or exceeding 0.7 milligram per square centimeter (0.7 mg/cm2) or 0.5% by weight." [9] This is more stringent than the HUD lead-based paint standard of 1.0 mg/cm2) . Some states have adopted this or similar definitions of "lead-based ...
Water intrusion into the indoor environment can be attributed from causes other than rising damp. Moisture penetration has been an ongoing problem for residences as evaporation occurs at the edge of the damp area, resulting in "tide marks" due to salt deposition. [30] The "tide mark" is commonly distinguished as a feature of rising damp.