Technical Bulletin #51 : Gutters and Metal Roofing

Remodelers, home builders, and real estate developers rely on GuildQuality's customer satisfaction surveying to monitor and improve the quality of service they deliver.
Get your free copy of An Insider’s Guide to Metal Roofing. Click here.
Angie's List Reviews
Click here for BBB Business Review


While property owners in most areas desire to have gutters and downspouts on their buildings, the construction industry is not always certain how to properly install gutters with metal roofing.


Generally, rain water will exit faster from a metal roof than it will from other roofing materials that have more porous surfaces. Additionally, some metal roofs, particularly those with shake, slate, and shingles designs, effectively “raise” the level of the roof due to their formed thickness.


When a metal roof is installed on a building, the gutters should be hung as high as possible, still allowing positive slope for proper drainage. Keeping the gutters as high as possible will help prevent water from over-shooting them. Additionally, particularly on large roofs, using 6” gutters instead of the standard 5” is wise. There are several brackets and other hanging methods that fasten strictly into the fascia and these should be used rather than brackets that extend up onto the roof deck. By mounting the gutter as high as possible, its back leg will often extend up under the drip edge for the metal roof. In some cases, the metal roof’s drip edge may need to be notched or penetrated to allow for the hangers. Many metal roof systems require that the underlayment beneath the roof be lapped over the eave edge and behind the drip edge. When this is the case, the back leg of the gutter should be located behind the underlayment as well as behind the drip edge. That way, any condensation that might run down the underlayment will end up in the gutter rather than behind it.

Classic Products, Inc.

Return to Technical Bulletins page

Classic Metal Roofs, LLC -- lifetime residential metal roofing. \'The best roofs under the sun.\' Located in and serving southern New England.

Classic Metal Roofs, LLC,
Serving Massachusetts, Rhode Island, Connecticut, and southern New Hampshire
Toll free: 866-660-6668
Classic Metal Roofs, LLC Classic Metal Roofs, LLC Classic Metal Roofs, LLC Classic Metal Roofs, LLC
E-mail Us HerePrivacy PolicyTerms of Service