Dallas Roofing: Article About Common Problems With Modified Bitumen Roofs
A modified bitumen roof is intermediate between single ply systems and built-up roofing systems. The roof has several layers of asphalt that are reinforced with fiberglass, plastic or rubber modifiers. Following are some of the most common problems that Dallas roofing professionals encounter with modified bitumen roofs.
The modified bitumen roof systems have long sections that are over 30 inches. One section adheres to the other and so forth. Improper application of the sheeting and stressed layers may make the seams fail, thus creating voids in some areas. Essentially, seams are the weakest part of any roof. Care must be taken when layering the seams and adhering them to each other. Moreover, both faces of the seams should be sealed at once, or the seam may become defective. The problem can be solved by reheating the seam. However, if the seams have only been ripped off in small pieces, one may use sealants to bind together the ripped-off seams.
This kind of roof can be punctured. Tree branches, tools dropped on the surface, walking on the roof or any other pressure can puncture the surface.
The expert roofers at Total Roofing of Dallas can assist you with any questions regarding emergency repairs or gutters.
If there is a vibration on the roof, the mechanical fasteners in the vibrating equipment may back out and cause punctures on the surface. If possible, it is advisable not to run vibrating components below the modified bitumen to avoid creating lines of weakness. Furthermore, any tree whose branches may fall on the roof should be pruned.
There may be moisture that has formed between the layers of the modified bitumen roofing. The moisture may cause blisters at the location of the seepage. The water must be removed from the site of the leakage by applying heat using a heat torch. Heat application impacts the membranes at the blistered region, causing them to stick together.
After constant exposure to sunlight, bitumen sometimes becomes warped along the edges. The warping causes the layers of bitumen to be lifted up and away from the roof. The raised regions may create voids in the flashing where moisture or small insects access other parts of the roof.
When the roof has not been layered uniformly, patches of water may end up ponding on the surface. Water ponds can cause weak points on the surface where water stays for long periods. Later, these could become blisters. Lastly, one should avoid high traffic onto the modified bitumen roof as this causes depressions, which turn out to be water ponds.