Re-roofing over an existing installation is a technique used by many roofers to save a homeowner money. The method is simple and involves little more than putting a new roof layer over one that is no longer serviceable without removing the damaged surface.
Unfortunately, most homeowners eventually realize the initial savings is temporary and often costs them more later, when more extensive roofing services are needed.
What Is Re-Roofing?
Re-roofing is a method of covering a damaged roof with a new layer without actually tearing away the damaged layer. Although most roofers agree that this is not the best way to handle leaks and other damage, many offer this service as it gives homeowners a less expensive option than tearing off and replacing the whole roof.
Adding a new layer over the old one is less labor-intensive and can be a temporary repair when there are no funds for a complete tear-off and replacement. Unfortunately, in most cases the savings is short-lived.
The Problems With Re-Roofing
The biggest problem with covering damaged materials with an overlay is that it is not usually possible to know for sure the extent of the damage that could be present. Adding more layers without repairing problems with the decking or structural components could leave homeowners at risk for worse damage later on.
In addition, when roofers apply a second layer over existing materials, it increases the possibility of new leaks since shingles and other materials are made to be applied directly onto the decking.
Most states only permit roofing services to install a second layer and no more, since each layer adds more weight to the structure. Based on these facts, re-roofing is not generally the best option when repairs are needed.
When Does Re-Roofing Make Sense?
Despite the fact that most roofers do not recommend this practice, there are situations when re-roofing may be applicable. These circumstances include when there is damage to one side or section of the surface that can be easily remedied with an overlay. It also applies to damage limited to the surface material with no damage under the shingles.
Provided the repairs are done properly, it may be possible to avoid the need for roofing services that include a new installation. Yet if an overlay is done improperly and unseen damage is simply covered up, homeowners could wind up with a bigger problem than what they had initially.
What Do Roofers Think?
The general consensus among reputable roofers is that re-roofing can provide cost savings today; however, it should be avoided in most cases as it can lead to more substantial damage later. If an overlay is being considered, homeowners should work with experienced roofing services what will perform a thorough inspection and only apply a second roofing layer if there is no evidence of damage to decking or structural parts.
The best way to prevent unforeseen roofing issues in the future is to always have a complete tear-off and replacement done!
