How to Replace Your Roof – the basics
Roof replacement or remodeling occurs when the damage is too great to repair a section of the roof, the roofing materials are old or outdated, or the homeowner decides to renovate the building. Methods of re-roofing include the “tear-off” and “lay over” methods, and the choice of method depends on the roofing material used originally, the condition of the old roof, the accessibility of the existing roof’s interior and the extent of the damage. In some jurisdictions, roof replacement requires a permit similar to that needed for installing a roof on a new home. Building codes in certain states allow only a single lay-over to be conducted, although for practical purposes a lay-over can be done up to three times.
The Tear-Off Method to Replacing Your Roof
Depending on the roofing material used, it may not be feasible to lay new shingles over the old. While this is usually the less expensive route, it is not necessarily the best decision. In the tear-off process, the old roof is removed in its entirety. This enables the roofing contractor to examine the inner section of the roof and evaluate the condition of the trusses or rafters. He can also make any necessary flashing repairs and identify condensation or other moisture problems in the attic. For homeowners who select a long-lasting roofing material such as metal, this process provides the opportunity to install new waterproofing underlayment to protect against future leaks, and it allows the contractor to correct any ventilation problems that may result from an old, inferior roof.
The Lay-Over Method to Replacing Your Roof
This process is best used when a roof is being replaced or remodeled for mainly aesthetic purposes. Provided that the original roof is intact or needs only minor repairs, the wooden supports pass inspection for rot and moisture, and they are deemed strong enough to support the additional weight, a new roofing material may be laid over the old. If the lay-over process is selected, it is advisable to install a full underlayment over the old roof before adding the new, or existing damage such as rot and moisture could spread to the new roof. During a lay-over installation of a new metal roof, lightweight metal may require wooden boards to be laid over the old roof before attaching the new roof. This is usually performed to even out the appearance of the old roof and to prevent an uneven surface once the new metal roof is in place.
The installation, repair or replacement of a roof is an investment in the value of a home, and the homeowner should be equipped with the most comprehensive information available before deciding which options to use. Building contractors who specialize in roofing have expertise in the various roofing materials as well as knowledge of local conditions, climate and problems particular to the region. A consultation with United Restoration will provide you, the homeowner with an inspection report and an estimate on the required work. Contact us today if you think your roof needs repair or replacement, the sooner you do, the better off you’ll be.