One of the longer lasting roofing options for flat roofs is bitumen roofing or a modified bitumen roof.
Modified bitumen roof problems.
Modified bitumen is approved for flat roofs with minimal slope but roll roofing is not viable below a 2 12 pitch two inches of rise for each twelve inches of horizontal run with exposed nails or a maybe little lower with concealed nail installation.
Manufacturing facilities due to the large number of rooftop penetrations are plagued by pitch pocket problems.
The methods of modified bitumen application are self adhesive torched on or hot or cold adhesive.
Modified bitumen roof installation inspection troubleshooting repair life expectancy definition properties of modified bitumen roofing modified bitumen roofing materials products metal roof supply sources modified roof inspection leak diagnosis repair maintenance modified bitumen roof shingles superkatepal questions answers about mod bit modified bitumen roofs.
Modified bitumen roofing has been around since the 1970s and tpo developed later in the 1990s but they both are ideal for all types of weather and have advantages and disadvantages.
Modified bitumen has a life expectancy of 10 20 years.
There are many reasons a pitch pocket fails.
Modified bitumen roof life defects wear common defects life of modified bitumen roof effective roof coatings.
Modified bitumen cons 1.
In the absence of a proper drainage system set up on a flat roof water is bound to get collected on the surface.
Modified bitumen roofs provide durable protection against the dangers of standing or slow to drain water.
The two most commonly used roofing systems in commercial properties are tpo and modified bitumen.
Modified bitumen is a type of asphalt product that can be applied in a number of ways to the roof in both hot and cold temperatures.
Roll roofing and modified bitumen are both suitable for low slope roofs.
Modified bitumen meets and exceeds building and insurance requirements.
Additionally hot bituminous and torch applied modified bitumen roofs may experience leaks when a proper moisture barrier is not installed underneath a coping cap on parapet walls according to avoiding common roof installation mistakes a cd rom produced by the center for the advancement of roofing excellence care ltd.
The most common problems include.
Modified bitumen roof defects wear signs life expectancy life extension by coating.
Although not extremely low it is still one of the lowest out of all the roofing materials options available.
Bitumen roof advantages and disadvantages.
This article describes common defects found on modified bitumen roofs such as buckling cracking granule loss improper installation details leaks.
The membrane consists of a multi layer sheet of asphalt with polyester or fiberglass reinforcements and plastic or rubber modifiers.
Problems with pitch pockets a type of roof flashing used to seal penetrations prevail on all types of roofs but are most typical on built up or modified bitumen roofing systems.
