Home > News > News > Waterproof Membrane and Const.....


Waterproof Membrane and Constructions

  • Author:Dong Sheng-rebeca
  • Release on :2016-08-11

Waterproof Membrabe and Constructions

In construction,a building or structure is waterproofed with the use of membrane and coating to protect contents as well as protecting structural integrity.The waterproofing of the building envelope in construction specifications is listed under 07-Thermal and Moisture Protection with master for mat 2004,by the construction specifications institute,and includes roofing material as well as waterproofing materials. 


In building construction, waterproofing is a fundamental aspect of creating a building envelope, which is a controlled environment. The roof covering materials, siding, foundations, and all of the various penetrations through these surfaces need to be water-resistant and sometimes waterproof. Roofing materials are generally designed to be water-resistant and shed water from a sloping roof, but in some conditions, such as ice damming and on flat roofs, the roofing must be waterproof. Many types of waterproof membrane systems are available, including felt paper or tar paper with asphalt or tar to make a built-up roof, other bituminous waterproof , EPDM rubber, hypalon, polyvinyl chloride, liquid roofing, and more.

Walls are not subjected to standing water, and the water-resistant membranes used as housewraps are designed to be breathable to let moisture escape. Walls also have vapour barriers or air barriers. Damp proofing is another aspect of waterproofing. 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. A potential problem in earth sheltered houses is too much humidity, so waterproofing is critical in these houses. Water seepage can lead to mould growth causing significant damage and air quality issues. Properly waterproofing foundation walls is required to prevent deterioration and seepage.