For a reroofing job, there are two options. The first is to remove existing shingles; this is called a tear-off. The second is to install new shingles over the old; this is called a lay-over. Therefore, it is not always necessary to tear off existing shingles — but it is almost always the better method. Here are a few reasons why a tear-off is better than a lay-over:
• A tear-off can reveal hidden damages, such as cracked decking or signs of water penetration, permitting correction before additional harm is done.
• A tear-off gives you the opportunity to have new felt or underlayment installed, reducing your risk of leaks.
• A tear-off reduces the weight to which your trusses and supports are subjected.
• A tear-off typically provides a cleaner, more attractive roof.
• Some manufacturers’ warranties do not apply (or benefits may be reduced) unless installations follow their guidelines precisely — and their guidelines are not typically designed for a lay-over.
• A tear-off is a good opportunity to identify and correct issues with poor attic ventilation or condensation.
Many local building codes specify the maximum load to which a roof can be subjected, based on the type of construction originally employed. Some jurisdictions just specify the number of layers of shingles that can be placed on a roof. Therefore, you may be required to choose a tear-off instead of a lay-over.
As for the disposal of the shingles removed, your contract and your written estimate should clearly state who is responsible for the collection, haul-off and disposal charges involved. Typically, the contractor handles it. However, if it is not specifically stated, ask for it to be included before you make a commitment to make sure that you are not held responsible for the charges.
At Alpha Roofing Industries, our crews have the training, experience and attitude to provide customers with superior work at reasonable rates. We handle repairs, roof replacements and new construction for both residential and commercial roofing needs. Call us at 1-512-777-1086, or request a free quote by submitting our online form.