Flat roofs require specific materials in order to ensure the roof does not break down due to the effects of standing water. Asphalt shingles, especially laminated ones, have too many bumps and ridges that can hold water if the roof is not steep enough. Over time that water can work its way between the shingles and compromise the roof.
Thankfully, we at Alves have a number of different options available when it comes to roofing your low pitch and flat roofs. While we can do built up roofing, we have two preferred methods: modified bitumen and single-ply membranes.
The first is modified bitumen, commonly known as torch down roofing. An evolution of asphalt roofing, torch down has a special backing that when heat is applied to it, will melt into the pre-installed underlayment. This ensures no fasteners puncture through the top layer so that moisture does not have an easy way into your roof structure.
Second, there is a single-ply membrane. A thermoplastic sheet is heat welded to itself to ensure there is a single impermeable barrier between your roof and the elements. The most commonly used and time tested thermoplastic is PVC. Not only is it durable, PVC roofs do not absorb heat the way asphalt derived roofing systems do. The lighter the color the more effective it is at deflecting heat from the sun and making temperature control within the building much easier. Alves works with only the finest manufacturers of PVC single-ply roofing systems. Duro-Last and IB Roofing Systems have both stood the test of time.
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