Roofing over an existing roof is also known as “roofing” or “overlap”. It is the process of installing a new roof over the existing one. One of the main and simplest reasons why it is not possible to apply a coat is when you don't have asphalt shingles. Installing a new roof over an existing one can only be done if you have shingles, because you can only put shingles on top of the shingles.
It is not possible to mix materials, or to install a new layer on slate or wooden tiles.Typically, roofing materials and a debris bin are delivered a day or two before your scheduled project to re-roof in the area. It is useful for the landlord to be ready for the arrival of the roofing equipment. It is ideal for moving patio furniture and other personal items that are aligned with the edge of the ceiling. This makes it easy for the crew to clean up any debris.
If there is debris on the roof, it is important for the team to clean it before reattaching the roof. You don't want anything to get caught between the old and the new layer of shingles. Your new roof is as good as what's underneath.Therefore, it is important for your roofer to fix any problem areas. It's kind of like road repair work that is done before repaving.
For example, damaged underlayment and siding must be repaired or replaced before the new roof is started up. When leaks are not detected, there may be a coating that is rotting or otherwise deteriorating. In these areas, it is necessary to cut the defective plywood or OSB before the installation of new subfloors and shingles.When laying new shingles over old ones, it's important to have a relatively smooth surface to work with. For example, if a tile is cracked, broken, or broken, it's important to replace the tile or use roofing cement to secure it.
Since roof replacement includes tearing everything off, it can be done on all roofs, regardless of the number of tile layers - they are all going to be removed in any case.Clearly it's easier to leave old shingles in place, but there's special prep work involved with a new roof (removing vents, ridges, and deformed shingles, among other things) and you still have to replace or add new flashings, which can sometimes be tricky compared to roofing old. Installing new roof tiles over old ones effectively doubles the dead weight of the roof, so you need to make sure your roof structure can withstand the additional load (which most roofers who are willing to install on top of old ones won't).When considering a roof replacement, simply adding new shingles over existing ones may be an option for homeowners to consider. If you know it's time to install a new tile roof or even a tile roof in your home, you may have heard that you can put a new layer of shingles on top of your existing one.The construction paper (tar paper) that is placed between the roof covering and the shingles is there for a very good reason: because water has a way of passing under the shingles, no matter how many layers of roof you have. Roofers have tricks for laying new roof tiles over old ones to keep the same steps between rows, but if any old shingles are hollowed out, curled, or missing, those defects will show through the new roofing layer.It is important to use experienced roofing technicians who know how to cut new shingles so that they fit precisely around vents and other roof penetrations.
The subfloor that is placed between the roof covering and the shingles is there for a very good reason; water has a way of getting under the shingles, no matter how many layers of roof you have.Installing new shingles over old ones effectively doubles the weight of the roof, so you need to make sure that your roof structure can withstand the additional load. A New Jersey residential roof is not designed to withstand the extreme weight of many layers of shingles, especially when the roof system is tensioned under the weight of intense snow and ice.Clearly, it's easier and cheaper to leave old shingles in place, but there's special prep work that involves a new roof (removing vents, ridges, and deformed shingles, among other things) and you still have to replace or add new flashings, which can sometimes be difficult compared to old roofs.