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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.
While structural damp-proofing and waterproofing to prevent decay was a motive of the Truscon laboratories chemicals, the side benefit was that it provided better hygienic conditions. [ 3 ] Some of the products developed for damp-proofing was Por-Seal, Stone-Tex, Stone-Backing, and Plaster Bond. [ 4 ]
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.
Elastomeric coatings can provide a vapor barrier and water proofing with permeability ratings of .016 perm rating with 10 mils/min. of coating and can be applied on interior or exterior surfaces. Aluminum foil, 0.05 US perm (2.9 SI perm). Paper-backed aluminum.
Damp-proofing rods are available with BBA approval. The rods are placed into holes drilled in the mortar course and the active ingredients diffuse along the mortar line before curing to form a damp-proof course. [53] Damp-proofing rods are usually supplied in 180mm (7") lengths suitable for inserting into a 9-inch thick wall.
From 1905 to 1988, The Paraffine Paint Co. of San Francisco had Malthoid as a trademark for waterproof and weatherproof building and roofing materials made of paper and felt in whole or in part. [13] However, it had become well known before that. [14] About 1913, Paraffine promoted its Malthoid roofing materials with a 16-page booklet. [15]