I.E. Remodeling Solutions a Division of David Fabbo
General Contractor - Lic # Vh 02190800 - 1-877-322-2699
Modified Bitumen Roof Maintenance
Our estimators spot repairs to your modified bitumen roof. Serviceable repairs will save you money when it is time for the roof to be coated.
Modified Bitumen Roof Restoration
Add 10 or more years to your built up roof with our modified bitumen roof restoration system. Get a seamless roof without costly tear off and disruption. Stop roof leaks and prevent further degradation.
Known Problems with Modified Bitumen Roofing
Alligatoring - Cracking of a built up roof producing a pattern similar to an alligator's hide
What is Modified Bitumen?
A modified bitumen roof system is a hybrid built-up roof. It has the benefits of the built in redundancy of the BUR, along with the added strength, flexibility and UV resistance of a modified membrane.
Modified Bitumen or "modbit" membranes consist of an asphalt and polymer blend which allow the asphalt to take on characteristics of the polymer. There are several surfacing option for this system which include a factory applied mineral surface, a gravel surface laid in bitumen or a liquid applied coating that is typically reflective in nature. Typical lifespan of a modified bitumen roof is 10 to 20 years depending on weather conditions.
Types of Modified Bitumen Roof
APP Modified Bitumen
SBS Modified Bitumen
Reflectivity of Modified Bitumen
The solar reflectivity of Modified Bitumen Roofs depend on the color of the surface layer.
Dark modified bitumen roofs can reach 150°F or more in the summer. The heat load of a dark roof can severely degrade the performance of airconditioning equipment.
Elastomeric coatings provide the highest reflectivity and is a very popular option for building owners. Leaks in modified bitumen roofs are difficult to isolate and a seamless roof coating system is the best alternative to roof replacement. White roof coatings can reflect up to 90% of the heat from the sun.
Modified Bitumen Roof Coating
Flat Roof Repair
Why Consider a Modified Bitumen Roof Coating Application
A modified bitumen roof coating can extend the life of your roof by 10 or more years. Asphalt degradation is a growing concern. UV-rays oxidize the surface of the asphalt and produces a chalk-like residue. As plasticizers leach out of the asphalt, a modified bitumen or "mod bit" roof becomes brittle. Cracking and alligatoring inevitably follows, allowing water to penetrate the system causing blisters, and cracks. Seam failure inevitably follows causing leaks.
A black modified bitumen roof absorbs a lot of the sun's heat in the summer. High temperatures and UV-rays accelerate asphalt degradation. To make matters worse, the heat build up raises plenum temperatures thereby increasing cooling costs in the building.
BEFORE: This modified bitumen roof has roof leaks in several locations. To make matters worse, the heat build up raises air temperature surrounding airconditioning units as well as the return plenum. This increases cooling costs in the building.
Modified Bitumen Roof Restoration Process
Cleaning and Surface Preparation
The entire modified bitumen roof was thoroughly washed using a 3,000 psi pressure washer. A biodegradeable degreaser was used to ensure a clean surface. All seams, flashings and penetrations were carefully sealed to render the roof watertight.
Priming ensures a good adhesion between the roof surface and the elastomeric coating.
30 dry mils of elastomeric roof coating is applied on the entire modified bitumen roof in 2 coats.
A fabric reinforced system is recommended for this job since there are plenty of seams that required sealing. The entire roof was primed with PrimeLock and while the coating was still wet, 40" wide PolyScrim roofing fabric was rolled out. PrimeLock was reapplied on the fabric to saturate it.
AFTER: A leak-free, seamless roofing membrane now covers the old, weathered modified bitumen roof. The cool roof coating reflects about 90% of the heat from the sun. The roof-top airconditioining units also operate more efficiently since the temperature intake air around the units have been noticeably reduced.
All these benefits for about half the cost of replacement. What more can you ask for?
Contact Us Today
At David Fabbo can meet all your home improvement needs. No job is too large or too small. Call us at 877-322-2699 or 908-212-1249 to set up a meeting and get an estimate for your job. Or email us by clicking on this link: Home Improvement Estimate
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