Roofing Over Existing Shingle

If you have any of these things then you need to repair them first.

Roofing over existing shingle.

In fact the only pro to a shingle over is it s cheaper and cleaner. If the job is done correctly with the new layer of shingles laid flat over the existing shingles the old roof cushions the new one and serves as a secondary barrier should wind or water ever break through the new shingles. Advantages of metal roofs over shingles. The issue happens because 3 tab asphalt shingles run on a 5 inch exposure you see 5 inches of the shingle out of the full 12 inches while dimensional shingles run on 5 inch exposure.

Let s start with the good. No missing shingles no gaps no holes in the roof no soft spots because of water damage. In this video i take show how to proper recover an old roof and make it look like it s a single layer check it out you might find useful tips for your new. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof.

Doing it now will make it easier to keep the reroofing job clean. When roofing over your existing shingles can be a good idea. How to do it remove caps. If you try to upgrade your 3 tab shingle to a dimensional shingle when nailing over it causes an aesthetic issue.

Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because.

When you should tear off your roof and start from scratch instead. Remove the ridge caps. 1st and foremost your existing roof needs to be in reasonable shape. You can save money because there s no dump fee for removing your old roofing and there s no need for additional felt paper over the old roof.

Installing new roof shingles over old effectively doubles the weight of the roofing so you have to make sure your roof structure can handle the extra load. When contemplating a new roof many people hope to simply do a shingle over and avoid the extra cost and mess of tearing off the existing roof and starting from scratch. Use a flat pry bar. Remove air vents and pipe flashings by prying out or unscrewing the fasteners holding the fixture.

That s also why building codes commonly limit re roofing to no more than two layers. By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them from being thrown into landfills. Disadvantages of metal roofs. Why installing new shingles over old shingles can be good.