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Rising damp is the effect of water rising from the ground into property. [3] The damp proof course may be horizontal or vertical. [4] A DPC layer is usually laid below all masonry walls, regardless if the wall is a load bearing wall or a partition wall. A damp-proof membrane (DPM) is a membrane material
Moderate rising damp on an internal wall. Rising damp is the common term for the transport of water in the lower sections of walls and other ground-supported structures by capillary action in porous materials. [25] Although rising damp of up to 5 metres (20') in height has been observed [26] the height of rise is
Masonry walls are built with a damp-proof course to prevent rising damp, and the concrete in foundations needs to be damp-proofed or waterproofed with a liquid coating, basement waterproofing membrane (even under the concrete slab floor where polyethylene sheeting is commonly used), or an additive to the concrete.
Walls appear to be bowed inward. 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.
Penetrating damp is visible as a darker patch on the plaster lining of the inner wall, usually starting at floor level on the ground floor and rising up from there, hence the term 'rising damp'. In extreme cases, salt leached out of the wall forms crystals on the surface of the plaster as the water evaporates.
A brick chimney breast. A chimney breast is a portion of a chimney which projects forward from a wall to accommodate a fireplace. [1] Typically on the ground floor of a structure, the masonry extends upwards, containing a flue which carries smoke out of the building through a chimney stack. [2]
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