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Damp-proofing rods use similar active ingredients to those found in liquid or cream-based rising damp treatments, but contained in a solid rod. They are generally considered to be easier to use than other types of rising damp treatment as the method of installation is simply to insert them into the correct sized holes drilled into a mortar bed.
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. Dampness problems are among the most frequent problems encountered in residences.
Walls of more than half-brick thickness need to be drilled at 230 millimetres (9.1 in) spacing to a depth of just over half the wall thickness. Walls of over 460 millimetres (18 in) thickness should be drilled from both sides. Fungicide is then injected into the holes, and the wall surfaces are sprayed. [8]
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.
Curing is intended to maintain moist conditions at the surface of concrete. It can be done by letting the formworks in place for a longer time, or by applying a hydrophobic thin film of an oily product (curing compound) at the concrete surface (e.g., for large slabs or rafts) to minimize water evaporation. Drying shrinkage
The early strength of the concrete can be increased if it is kept damp during the curing process. Minimizing stress prior to curing minimizes cracking. High-early-strength concrete is designed to hydrate faster, often by increased use of cement that increases shrinkage and cracking. The strength of concrete changes (increases) for up to three ...
Walls liable to damp are sometimes battened and lathed to form an air cavity between the damp wall and the plastering. Lathing in metal, either in wire or in the form of perforated galvanised sheets, is now extensively used on account of its fireproof and lasting quality.