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www.familyhandyman.com/roof/installing-metal-roofing-over-shingles/view-all

Need a new roof? Covering your existing asphalt shingles with metal roofing might be worth the expense. Here are some pros and cons.

www.tricountymetals.com/blog/2012/december/can-you-install-metal-roofing-over-shingles-

Dec 3, 2012 ... The reason for this is so when the metal roof gets installed, that the ... There are really two ways to install a metal roof over a shingle roof.

www.unioncorrugating.com/installs-over-existing.html

Metal roofs have the best strength to weight ratio of any roofing material, allowing metal roofs to be installed over existing asphalt shingle roofs without the need ...

www.asktoddmiller.com/articles/should-existing-asphalt-shingles-be-removed-before-a-metal-roof-is-installed

Steel shingles weigh about 1/4 what asphalt shingles weigh and aluminum shingles .... In many cases, metal roofs can be installed over old shingles but code ...

.ask.com/youtube?q=Install+Metal+Roofing+over+Asphalt+Shingles&v=o_bT8127X8Y
Mar 9, 2013 ... http://www.metal-roofing-contractors.com Metal roofing panels installed over the properly prepared shingle roof , Jackson Ms. the perimeter ...
.ask.com/youtube?q=Install+Metal+Roofing+over+Asphalt+Shingles&v=fJNLTfoWJ8A
Jul 1, 2016 ... RoofingIntelligence.com 1,805,876 views · 3:29 · Should Shingles be Removed Before a Metal Roof is Installed? – Metal Roofing 101 with ...

answers.angieslist.com/Why-leave-shingles-installing-metal-roof-q65128.aspx

The old roofing should be removed, underlayment installed and furring .... But the issue of putting metal roofing over "perfectly good" asphalt ...

ths.gardenweb.com/discussions/2606314/yes-or-no-putting-a-metal-roof-over-one-layer-shingles

Sep 28, 2013 ... We had a metal roof (steel shingles) installed 2 years ago and we had them remove the original layer of asphalt shingles that were about 15 ...

www.metalroofnet.com/metal-roofing-blog/bid/85382/Pros-and-Cons-of-Going-Over-Existing-Roof-Material

To start, there are thousands and thousands of metal roofs installed over existing composition shingles and/or wood shakes that have been problem-free for ...

www.backwoodshome.com/installing-a-steel-roof

Another factor that has increased the popularity of metal roofing is the logistics. ... Still, if you decide to install a steel roof over old shingles, there are five things ...