Winters in Cincinnati, Ohio can be beautiful, and they can be brutal. The ice and snow alternating with the rain and sunshine can do a number of commercial roofing. These are the reasons that many commercial property owners choose a modified bitumen roofing installation when they need a new roof.
A modified bitumen roofing installation is five layers starting with an asphalt-based and is one of the top choices for a commercial structure with a flat or low-sloped roof. So, what is a modified bitumen roof made of?
Modified Bitumen roofing installation will have 5 layers, as we stated. This roof style of roof engineering originated in Europe in the 1960s and has been successful here in the U.S. since around the mid1970s. The framework that makes a Modified Bitumen Roofing installation consists of the following:
The steps for a modified bitumen roofing installation begin with the roof decking inspected and repairs made if needed. Then a rubberized asphalt is applied to the decking with two layers of rolled roofing felt next. The typical modified bitumen roofing installation will have two layers of membrane minimum. Next, the base sheet is installed then the cap sheet.
There are four ways that a modified bitumen roofing installation is performed:
When all is said and done and the modified bitumen roofing installation is complete, the asphalt combined with polymerized rubber, or a plastic has a fiberglass reinforcement. The ending results are a flexible but rugged and waterproof roofing membrane.
The finished product with a modified bitumen roofing installation will be a roofing membrane consisting of multiple modified bitumen sheets, or a combination of roofing felts and multiple modified bitumen sheets. The rubber-modified asphalts, like SBS (styrene-butadiene-styrene) material is a granular surface. It is typically mopped on, torched on, or a cold adhesive applied. If the APP (atactic polypropylene), a -Plastic-modified asphalt is used, the final surface may be granular or smooth.
Absolutely, which is one of the reasons it is a popular choice in the Cincinnati area. The following are basics steps to repair a modified bitumen roofing installation:
If the top surface is smooth, yes. A granular, rough top finish shouldn’t need painting and wouldn’t take the paint in a smooth manner anyway.
A properly maintain modified bitumen roof installation will extend the service life of the roof. Modified bitumen roof are excellent for waterproofing protection, but the seasons can abuse the roof and the structural integrity of the building.
After a modified bitumen roofing installation, consistent maintenance is a must, including monthly visual inspection by your maintenance staff and a professional by a roofing contractor every 2 years.
With the recommended schedule of inspections and follow through with any repairs, a modified bitumen roofing installation should give you 20 years or more useful lifespan.
Which is better: modified bitumen or TPO roofing? It depends. If you’re looking for a long-term roofing option, modified bitumen roofing installation is the right choice. If you’re on a tight budget, TPO could be the better option.