SBS-Modified bitumen consists of bitumen with a synthetic rubber modification, adding styrene-butadiene-styrene (SBS) offering a ‘sticky’ melt which increases the hotter it gets. This lack of liquid flow means it takes less heat to install and allows a faster installation . SBS systems can also be installed with cold adhesive on projects where open flames are not permitted.
SBS (Styrene Butadiene Styrene) bituminous membranes are installed using a variety of methods, including:
Heat welded seam method: involves heating the overlapped edges of the membrane with a propane torch to create a seamless, watertight bond between the two pieces of membrane.
Cold adhesive method: involves using a cold-applied adhesive to bond the membrane to the roof deck.
Mechanically fastened method: involves using special mechanical fasteners to attach the membrane to the roof deck.
Ballasted method: involves placing heavy stones or pavers on top of the membrane to keep it in place, without the need for fasteners or adhesives.
The choice of installation method will depend on factors such as the type of roof deck, the local building codes and regulations, and the desired level of seam strength and durability. It is recommended to seek the guidance of a professional roofing contractor for the installation of an SBS bituminous membrane.
Bituminous waterproofing systems are designed to protect residential and commercial buildings. Bitumen (asphalt or coal-tar pitch) is a mixed substance made up of organic liquids that are highly sticky, viscous, and waterproof. These systems are sometimes used to construct roofs, in the form of rolls.
Insulation specialists use the term, “thermal envelope” or “building envelope” to describe the conditioned space inside a building suitable for humans. The lack of natural airflow in a building creates the need for mechanical ventilation and high humidity, which results in condensation, rotting materials, and microbial growth like mold.