Felt was covered mainly two types of roofs - flat, mainly on the type of buildings in cube Before you decide to proceed with an indoor asphalt roof felt, an assessment of the existing coverage.
When the repair is sufficient.
Whether the roof covered with felt only requires repair, or whether it is necessary to position the new coverage, determines the scale of damage. When on a flat roof is only a few blisters, certainly do not need to put a new covers.
However, it is necessary to breakage liquidation. It is to this end to cut it carefully - preferably when the weather outside is sunny. It should also be allowed to dry ground beneath them at least for a few hours and then felt the excess resulting from the extension to remove, and carefully seal the hole, for example, one layer of regular felt or asphalt primer. Such treatment may be sufficient even for five years.
Cracks formed on the coats of asphalt roofing apply to both flat and slanted. This is the result of the impact of UV rays. The sun makes the hydrocarbon chains, which is built mass of bitumen, be reduced and divided into smaller. As a result of this process, it becomes possible to evaporation of asphalt, with the result that the Pope appears in grid cracks. Such damage can be repaired and postpone the moment of laying a new cover up to four or five years.
How to choose Felts:
* For temporary roof protection is suitable papa simple - on the base of cardboard or glass veil, glued felt it can cover temporary buildings and use it to renovate roofs of covered earlier, such was felts
* During the renovation of the old facility, where investors want to "forget" about the need to maintain the roof, modified bitumen roof membranes should choose welded or mechanically fastened with a guarantee of 10-15 years, which need not be maintained;
* To secure the roof when we do not want to spend too much money and does not prevent us from the need of its preservation in the future (after 8-10 years) - you can choose felt welded oxidized
* Where they count fast execution time and reliability, check the SBS modified asphalt roofing to single-ply mechanically fastened;
The most common misfeasance:
* Lack of priming the substrate before laying pap heat sealing;
* Felt too weak warm burner, which does not cause an exit from the underside of the asphalt roofing felt - the result is a weak glue felt to the ground;
* Absence of mass outflows asphalt plants along the longitudinal and transverse;
* Too small width of the plants and the transverse weld on raw performance, not prepared asphalt surface
* Laying tar paper backing and the covering of face, so that plants a longitudinal or transverse overlap, creating unnecessary protuberance
* Lack of tar paper and perforated ventilation chimneys on flat roofs.
