Built-Up Roofing Contractors, Birmingham, AL Licensed & Insured Professional Roofers
Built-up roofing (BUR) systems are likewise called "tar and gravel" roofs. They are among the most typically utilized roofing product applied on low-slope or flat roofs. BUR systems are comprised of varying sheets of bitumen and fortifying materials (roofing felts or ply sheets) that make up a completed sheet with a finish or mixed sheet. The variety of plies in a cross-section is exactly what constitutes the quantity of plies on the roof. Depending upon the applying, the ply sheets or roofing felts are often fortified with natural or fiberglass liners. Modern BUR materials consist of a compressed insulation layer as a component of the roof.
BUR systems are remarkably tough and are strong enough to manage traffic and other structures on the surface area. They can give added area on the structure. These roofs are likewise visually pleasing and extremely resistant to severe weather. To cut down on energy usage and to give protection to from UV rays, BUR systems exterior products may be covered or painted with reflective materials.
In BUR systems, the bitumen utilized can either be asphalt (most popular), coal tar, or cold-applied adhesive (solvent-based asphalts). Coal and asphalt bitumen is oftentimes heated up in a tanker or pot just before applying utilizing a mechanized or mop spreader. For cold-applied adhesives, you do not have to heat prior to applying. Nevertheless, surfacing for such roofs are done employing aggregates like slag, mineral granules or gravel. Otherwise, glass fiber, aluminum finishings, mineral surfaced cap sheets, elastomeric finishings, or hot asphalt mopped over the full surface area, may be applied. New BUR systems integrate a firm protection layer.
Kinds of BUR Systems
Depending upon the job and one's budget plan, one can select among the following BUR systems:.
This includes the use of either cold or hot asphalt on a roofing surface area. Of the 2, cold asphalt has much better efficiency and is not reliant on the weather condition.
2. Ballasted asphalt
As a result of their exceptional surface as well as having fire retardant components, these are typically used these days.
BUR Systems provide:
1. Fire and uplift resistance
BUR systems go through extensive tests through Underwriters Laboratories and FM Approvals. They comply with stringent flame resistance criteria and come with sufficient uplift resistance throughout significantly stormy conditions.
2. Thermal efficiency
BUR systems are highly resistant to heat conduction through the exterior and interior of a structure. They, for that reason, add to lessened cooling and heating expenses.
3. Water resistant barrier
The multi-layer protective cover provided by BUR systems of bitumen and bitumen saturated plies offer several years of security from the environment.
BUR systems give among the very best financial investments in high-performance commercial roofs because of their affordable expenditure annually of expected lifespan service.
Pros of Built-Up Roofing
- Much better insulation
- Stable and sturdy surface area
- Quick and easy to fix
- Exceptional waterproofing protection
- Fire and uplift resistance
- Multi-layer protection from the weather
- Thermal efficiency
- UV protection
Cons of Built-up Roofing
- Costly start-up setup expenses
- Direct exposure to fumes and vapors throughout setup
- Significantly heavy and requires sturdy support systems
- Slower setup
Repair and Maintenance
Built-up roofing is expected to become worn away with time. Asphalt degeneration leads to a chalk-like deposits generated in time as UV radiations corrode the asphalt covering. The roof ends up being fragile and starts showing up gaps on the surface area that can let water to seep in. When this takes place, leakages, eruptions, gaps, and undulations will show up and can result in considerable damage on the roof.
Repair works are fairly very easy, however routine upkeep, a minimum of two times a year, is essential to optimize the BUR system's life span. In addition to preventive clean-up maintenance schedule, it is suggested to add a new layer of finishing every 10-12 years to prevent future replacement or tear-off which are rather expensive.
Guarantees for BUR systems can be found in 2 types. One is from the maker while the other is from the roofer. The maker's guarantee cover flaws in the production of the roof layer while the roofer's guarantee covers his craftsmanship, which takes care of setup and associated problems. On the specialist's guarantee, one must take note of which products are covered and exactly what invalidates them.
The built-up roof is among the earliest systems offered and among the most tough choice for low-sloped or flat roofs. Since it is made of several layers and can manage severe weather conditions, it gives trusted security. In addition, they are effective insulators which decrease the expense of cooling and heating expenses. The roofing systems are one of the finest financial investments in the market today due to their affordable expense per year of projected life span.