Overlaying shingles prevents roofers from properly installing water and ice leak barriers. Small roofs cannot handle immense amounts of weight. Adding a second layer to your roof only increases that strain , and can cause further roof problems, especially if the area you live in receives a great deal of snow each year. Re-roofing can adversely affect the warranty on new shingles. Specific geographic areas will have guidelines regarding how many roof layers are allowed on buildings.
While some building codes may allow re-roofing , others may only allow one layer of shingles. If you live in a location that receives heavy storms, it is important to assess your local code regulations. These membranes adhere to the roof deck and are most often used in the eave area, covering the lower three to six feet of deck.
The challenge is that they usually do a good job of adhering to the deck, especially after many years of summer heat, which works to fuse the membrane to the oriented strand board OSB or plywood substrate.
These membranes cannot be lifted with that shingle-stripping shovel. By following all the steps above, you should have your roof deck clean and clear, and ready for a new IKO shingle installation. A reputable, qualified roofing professional can help you with the shingle removal process as well as re-roofing. To find such a professional roofing contractor near you, use our contractor search tool.
All rights reserved. The information on this website is subject to change without notice. IKO assumes no responsibility for errors that may appear on this website. IKO strives to accurately reproduce the screen images of the shingle swatches and house photos shown. However, due to manufacturing variances, the limitations of your monitor resolution and the variation in natural exterior lighting, actual colors may vary from the images you see. To ensure complete satisfaction you should make final color selections from several full size shingles and view a sample of the product installed on a home.
Please refer to our Legal Notices for U. Location set to view all. Show All Products. How to Tear Shingles Off a Roof. Step One: Determine if the existing shingles need to be removed. And there are benefits to doing so, including: You get a chance to inspect the deck for any weak or rotted areas and make repairs prior to installing the new layer. Some shingle properties for example impact resistance may have only been evaluated on shingles applied directly to the deck.
An underlying old shingle layer may affect those roof performance properties. And, of course, a new layer of shingles applied directly to the roof deck has the best opportunity to look smooth, uniform and flat.
Step Two: Ensure that the materials for the new roof are ready and on-site. That way, the roof will be left exposed for as little time as possible. This can be especially dangerous if you live in a cold climate where your roof needs to be able to carry as much snow load as possible.
The more weight your roof is already carrying, the less snow it will be able to reliably support during the winter. Be sure you know how much snow your roof can support and check to see if another layer of shingles would reduce the roof below the capability it needs for safety.
These three points demonstrate how a roof overlay can have a higher cost than you realize, both in more money spent later and in potential roof damage and shortened shingle lifespan. Whether you need a new roof, a roof damage assessment to decide between repair and replacement, or other roofing services, SUNVEK is ready to help.
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