{"id":193,"date":"2007-08-25T00:00:00","date_gmt":"2007-08-25T00:00:00","guid":{"rendered":"https:\/\/www.realty.com\/blog\/uncategorized\/layering-asphalt-shingles"},"modified":"2007-08-25T00:00:00","modified_gmt":"2007-08-25T00:00:00","slug":"layering-asphalt-shingles","status":"publish","type":"post","link":"https:\/\/www.realty.com\/blog\/expert-advice\/layering-asphalt-shingles\/","title":{"rendered":"Layering Asphalt Shingles"},"content":{"rendered":"

Q: I would like to know if it is recommended to remove previous, 18 year old asphalt shingles before installing new shingles of the same type?<\/strong><\/p>\n

A:<\/strong> Thanks for your inquiry, it is a common question. Although it is usually legal to overlay a second (but not a third) layer of asphalt shingles he doesn’t recommend it.<\/p>\n

The building code, and most municipalities, will allow you to overlay a second (but never a third) layer of shingles on an existing shingled roof. You will need to check with your building inspections department to be sure.<\/p>\n

If you are doing the roofing yourself, you will save the extra labor and the problem of disposal. I know first hand, I put myself through graduate school in Waco, Texas roofing houses and it is hard work-no way around it! However, it is not the recommended procedure for the following reasons:<\/p>\n

* If there’s any curling of the old shingles, the new shingles will not lay flat.
\n * Moisture can get trapped under the heavy layers and cause premature rotting of the wood.
\n * You do add excess weight to the roof framing, which can cause the decking and\/or roof joists to bow and cause a ripple effect in the roof.
\n * Overlay will not work well at all with dimensional shingles, only three tab.
\n * If you do overlay, you have to cut off the tab of the first course which will give you a “bump” about 6″ up the roof all the way around the roof.
\n * You must pull off both layers before you roof next time. Many times the cost for a double tear-off is more than doing it two separate times.
\n * Tear off will give you the opportunity to examine the decking for any rot and make repairs now before it gets worse (and more costly).
\n * If you do remove the old shingles, you will end up with a nice fresh layer of felt on the roof deck.<\/p>\n

To find several reputable roofing contractors to gather estimates and options for installing your new roof, simply visit our site at homeadvisor.com<\/a>, and let us match you with the ideal service professional in your area!<\/p>\n

Good luck!<\/p>\n

David Radcliff, Certified Remodeler <\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Q: I would like to know if it is recommended to remove previous, 18 year old asphalt shingles before installing new shingles of the same type? A: Thanks for your inquiry, it is a common question. Although it is usually legal to overlay a second (but not a third) layer of asphalt shingles he doesn’t …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,44],"tags":[],"class_list":["post-193","post","type-post","status-publish","format-standard","hentry","category-expert-advice","category-roofing-siding-gutters"],"_links":{"self":[{"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/posts\/193","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/comments?post=193"}],"version-history":[{"count":0,"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/posts\/193\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/media?parent=193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/categories?post=193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.realty.com\/blog\/wp-json\/wp\/v2\/tags?post=193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}