Modified bitumen roofs are a popular choice in the commercial roofing industry for their long useful life, versatility and inherent resistance to damage of all kinds.
Modified bitumen is a roofing membrane made from asphalt mixed with thermoplastic polymer with reinforcing layers of polyester or glass-fiber fabric, with embedded granular ceramics as the top layer. The addition of thermoplastic polymer in the mix allows the asphalt to take on a plastic-like quality that helps to increase the UV resistance and waterproofing abilities of the roof membrane.
Modified bitumen membranes can be applied in multiple layers, similar to a built-up roof (BUR), but a single-ply application has many advantages on its own.
Modified bitumen is a five-layer composition made of the following components:
If you are in need of a knowledgeable roofing contractor that specializes in modified bitumen roofs, the industry-leading team at AKVM can help. We offer competitive pricing, financing options, and free in-person evaluations and quotes. Contact us with any questions you may have, we will be happy to assist you.
Developed in the 1960s in Europe specifically for flat or low-slope roofs, modified bitumen is designed to withstand temperature fluctuations and foot traffic without tearing, lifting or cracking and can be installed over the top of an old roof if certain conditions are met, eliminating the tear-off step. The step-by-step installation process is as follows:
It must be noted that the following torch-down method of installation for modified bitumen roofing should only be performed by a qualified roofer, as the process can be dangerous.
The cold-adhesive application method is outlined here, but modified bitumen can also be installed by using a self-adhering sheet, making the installation even easier for the roofers and saving you labor costs. Cold-process adhesive methods do not give off chemical fumes during or after application. In some areas at risk of experiencing high winds, mechanical fasteners are used to create the strongest wind resistance.
AKVM is dedicated to providing you with all the information you need to determine which type of roofing is best suited for your commercial building, and we guarantee our materials and workmanship so that you feel at ease with your business’ new roof. Questions about modified bitumen roofing?