New Roof In Grand Prairie TX
Generally speaking, there are only two arguments for a new roof In Grand Prairie TX why you would want to layer your new shingles on top of the old existing roof. The two arguments relate to convenience and cost and while these may be short-term benefits, in the long run, opting for this alternative is neither going to neither be convenient nor save you money. The main reason why you may be considering layering the new roofing shingles on your existing roof is that by avoiding the removal of the current layer of shingles (called the tearoff), you avoid removing the present layer. This might save a little bit of money and the project is also likely to be completed quicker. However, this may be in violation of your local roofing codes and, in addition, the quality and effectiveness of your roof can be easily compromised. It is true that you might save a little money. But there are plenty of instances where this shortcut results in roof failure despite the fact that a brand-new roof should last for 25 years.
New shingles are designed to be used on flat surfaces and they do not therefore do a particularly good job of covering gaps and dips, including the texture created by overlapping shingles. Experts on reroofing can cause lay new roof shingles on top of the old so that the step up remains the same, but if any old shingles are out of shape for any reason, these defects will be transmitted to the new layer. Many roofers, recommend using laminated or dimensional shingles for reroofing because they are thicker than the normal shingles and often have a staggered edge, which helps to hide in regular spots transmitted from the old layer.
Shingles can be heavy and add weight to the roof because good quality composite shingles can add up to 450 pounds for every 100 ft.² of roofing. There is a good chance that the structure of your roof was only designed for the load of one layer of shingles plus the weight for things like snow and an extra safety margin. The installation of new shingles over the old ones could double the weight of the roofing Surya have to be absolutely sure that the roof can handle up the extra weight. This is one reason why many building codes restrict reroofing to no more than two layers. On some houses, the extra weight of multiple layers can cause the decking to sag between the support trusses.
Another good reason for the tearoff is a visual inspection of the sheathing on the roof, without which roofing contractors cannot see the condition of the deck. A good quality roofing contractor will carry out a careful inspection of the roof by walking on spongy areas and other problem areas so that local repairs can be completed before the reroofing process. Contractors who do not follow the same standards are likely to be less discriminating. Similarly, the building paper between the sheathing and the shingles is there to keep out water, which gets under shingles. Moreover, adding the ice and water shield is never an option in the case of reroofing.
New shingles are designed to be used on flat surfaces and they do not therefore do a particularly good job of covering gaps and dips, including the texture created by overlapping shingles. Experts on reroofing can cause lay new roof shingles on top of the old so that the step up remains the same, but if any old shingles are out of shape for any reason, these defects will be transmitted to the new layer. Many roofers, recommend using laminated or dimensional shingles for reroofing because they are thicker than the normal shingles and often have a staggered edge, which helps to hide in regular spots transmitted from the old layer.
Shingles can be heavy and add weight to the roof because good quality composite shingles can add up to 450 pounds for every 100 ft.² of roofing. There is a good chance that the structure of your roof was only designed for the load of one layer of shingles plus the weight for things like snow and an extra safety margin. The installation of new shingles over the old ones could double the weight of the roofing Surya have to be absolutely sure that the roof can handle up the extra weight. This is one reason why many building codes restrict reroofing to no more than two layers. On some houses, the extra weight of multiple layers can cause the decking to sag between the support trusses.
Another good reason for the tearoff is a visual inspection of the sheathing on the roof, without which roofing contractors cannot see the condition of the deck. A good quality roofing contractor will carry out a careful inspection of the roof by walking on spongy areas and other problem areas so that local repairs can be completed before the reroofing process. Contractors who do not follow the same standards are likely to be less discriminating. Similarly, the building paper between the sheathing and the shingles is there to keep out water, which gets under shingles. Moreover, adding the ice and water shield is never an option in the case of reroofing.