Built-up roofs include smooth asphalt built-up, either hot or cold, and ballasted asphalt built-up. All types are generally comprised of three parts: bitumen material, ply sheets, and one or more surfacing materials. The type of surface coating used can be instrumental in cost and durability.
The bitumen material commonly used in built-up roofing systems is either asphalt, coal tar, or cold-applied adhesive. The surfacing and materials are varied and depend entirely on your project and your budget. Ballasted asphalt is being used more regularly these days because it can provide an excellent finish surface and its material is a better fire retardant agent.
Cold built-up roofing is also available. This can be sprayed or applied with a squeegee. It doesn’t require hot asphalt for application, and it doesn’t give off toxic fumes when it’s applied. It’s often preferred for environmentally sensitive projects for this reason. Cold built-up isn’t dependent on weather and it has a better performance when compared to hot built-up roofing.
- Time tested roof system as it multiple layers provide protection and durability
- Has the ability to be coated with reflective material to provide the building owner with additional heating/cooling efficiency
- Given the multiple layers, they are easy to repair and will withstand heavy foot traffic
Warranty Capabilities: 10-35 Years
Approved Installers with: Tremco, Garland, Carlisle, Firestone, John Mansville & more.
Two most common types;
- SBS (styrene-butadiene-styrene) systems are bituminous based that have been modified with rubber. This is beneficial, specifically in colder climates as the material is more flexible. This type of system has been around since 1975 and has four primary installation options including torch, hot asphalt, cold-applied and self-adhering rolls. The application flexibility allows installation at all temperature levels, especially when construction dates shift to the colder months. The rolls are typically reinforced with polyester or fiberglass which makes them very durable. Two potential downsides are the system does not hold up well if constantly exposed to oil or hydrocarbon chemicals and installation can require a longer investment window that would not be beneficial to property owners looking to flip the property because of a high initial cost.
- APP (attactic polypropylene) systems have a higher softening temperature which makes them preferred in hotter climates. They are very similar to an SBS system, but their chemical compound can make them more brittle in colder temperatures. The benefits to the system are that they hold up at high temperatures and strong wind events. Given the resistance to heat the only two installation methods are cold adhesive and torch applied.