Waterproofing is the process of making an object or structure waterproof or water-resistant, so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions. Such items may be used in wet environments or under water to specified depths.
Water resistant and waterproof often refer to penetration of water in its liquid state and possibly under pressure, whereas damp proof refers to resistance to humidity or dampness. Permeation of water vapor through a material or structure is reported as a moisture vapor transmission rate.
The hulls of boats and ships were once waterproofed by applying tar or pitch. Modern items may be waterproofed by applying water-repellent coatings or by sealing seams with gaskets or o-rings.
Waterproofing is used in reference to building structures (such as basements, decks, or wet areas), watercraft, canvas, clothing (raincoats or waders), electronic devices and paper packaging (such as cartons for liquids).
In construction, a building or structure is waterproofed with the use of membranes and coatings to protect contents, and structural integrity. The waterproofing of the building envelope in construction specifications is listed under 07 – Thermal and Moisture Protection within MasterFormat 2004, by the Construction Specifications Institute, and includes roofing and 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 must 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 waterproofing, ethylene propylene diene monomer 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 porous enough to let moisture escape. Walls also have vapor 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.Southern AfricaYouth Project is a youthDevelopment Non-Profit Organisation with head offices in Johannesburg, South Africa . The organization was founded in 2005. It is registered as a non-profit organization, section 18A tax-exempt and tax compliant organization. Southern Africa Youth Project aims to empower communities through up-skilling them to recognize and utilize the opportunities that are around them. Southern Africa Youth Project does this by enabling Girls, Youth and Women to access Technology, Education , Health, and Employment Opportunities. We operate in townships and rural areas impact young people between the age of 18 - 35 with a different basket of services. To partner or collaborate with us send us an email at email@example.com or contact us at + 27 (0) 78 637 0815 Southern Africa Youth Project is a regional Youth Development non-profit organisation that aims to empower and development communities through giving them to access Technology, Education, Health and Employment. Southern Africa Youth Project is a registered Non-Profit Organisation with its headquartered based in Johannesburg, South Africa. Southern Africa Youth Project is providing youth development activities and projects throughout the Southern Africa Region. community . Southern Africa Youth Project operates in the whole of Africa with a major focus on the Southern African Development Community. We work with national, regional, provincial, district and local governments, business , individuals, philanthropists, donors, foundations and locally based non-profit organisation to address community challenges. In delivering its work Southern Africa Youth Project works with a local grassroots non-profit organisation through providing capacity building , co-funding, project management, monitoring and evaluation. We believe in working on collaboration rather than replicating what is already there. We also understand that development requires those who are locally based to address them. We believe that those born in those communities can address their challenges better than someone who just visits Southern Africa Youth Project believes that local people are the only people who can address their own challenges and problems. Southern Africa Youth projects adopts a multi-faceted community development approach where in its implementation of work and services. it engages communities where the services are provided from strategic planning, implementation to monitoring and evaluation as a whole. Southern Africa Youth Project has implemented a structured set of policies and systems that governs all its operations. this is from quality management, program implementation, finance, human resources, marketing, communications, administration and governance