Flat Roof Waterproofing
There are only a few true waterproofing materials available for in today’s market. These waterproofing systems can either be spray-applied or are sheet goods that are attached mechanically or with adhesive. The basic materials include:
EPDM Waterproofing Membranes
EPDM is a lightweight, durable and weatherproof single-ply waterproofing membrane perfect for a wide variety of applications. For more than 20 years, it has been proven that it can withstand extreme temperature fluctuations and constant exposure to direct sunlight. Also, it has exceptional elasticity and will not split or crack under normal building movement. EPDM waterproofing membranes are an effective and high-performance waterproofing system for contemporary commercial roofing structures.
Rubberized Asphalt Waterproofing Membranes
Rubberized asphalt is the most commonly used waterproofing membrane material today. It can be applied by spray and peel and stick sheet goods. Both the sprayable and the sheet versions are sensitive to ultraviolet light so it must be covered and protected when it is exposed to sunlight. The sprayable version is predominately water-based, making it safer to work with but also susceptible to freeze damage before it cures.
SBS Waterproofing Membrane
SBS is a high-performance rubber modified bitumen membrane, reinforced with a combined reinforcement (polyester and fiberglass). The exceptional elongation properties of S.B.S. combined with the strength and dimensional stability of the reinforcing provides an excellent waterproofing membrane for new and existing commercial roofing constructions. SBS is coated with either a sanded or talc top surface finish, while the bottom surface is embossed and protected by a heat sensitive polythene film.
Liquid Waterproofing – Coatings & Sealants
Elastomeric Deck Coating: Elastomeric roof coatings are very effective in solving roof leaks and can be used to restore virtually all types of roofs. It has elastic properties and can stretch in the summertime heat and then return to their original shape without damage.
Bentonite waterproofing membranes are clay based and become a thick gel that expands when it gets wet, preventing the movement of water. The clay is usually sandwiched between two layers of cloth or geotextile. There is an extensive amount of this product used in foundation wall waterproofing on commercial and industrial roofing.