underlayment Articles

#39 – Metal Roof Installation: Should Shingles be Removed?

May 3, 2017

Should Shingles be Removed Before Installing a Metal Roof? If your home is presently roofed with asphalt shingles, you may be able to avoid the expense of tear-off and protect the environment by reducing landfill. Metal roofs are much lower weight than most other roofing materials. Aluminum roofing weighs around 50 pounds per 100 square… ( read more )

Can Metal Roofs Be Installed Direct Over Old Shingles?

March 8, 2017

Q: Is it OK for metal roofing to be screwed down directly on top of asphalt shingles, without any wood or other material between the metal and shingle? A. You may wish to take a look at the videos in our Metal Roofing 101 video series … there may be some topics of interest to you. I… ( read more )

Recent Question About Roof Deck Insulation

February 16, 2017

I received the following question recently from a homeowner named Tom. He is obviously doing his homework to ensure a successful roofing project. I like that! Q: Todd, I saw your info on metal roofs over shingles and have a few questions. I have a double wide low pitch roof that has some saging between… ( read more )

Install Metal Over Old Shingles

September 24, 2009

Q: I was given a quote to install a metal roof over the existing shingles. The shingles are very curled on parts of the roof. Is this an issue? The installer stated the curls would break off when they are walking on it during the installation. A: I suggest two things. 1) Always a layer… ( read more )

Install Over Old Shingles

September 1, 2009

Q: We’re looking to replace our asphalt shingle roof with a 26 gauge galvalume metal roof. In your opinion should we have the old shingles removed or just have the metal place over the shingles? Also, if leaving the shingles should we have anything between the shingles and the wood? We live in central Texas… ( read more )

New Metal Roof

August 13, 2009

Q: I’ve got a few questions for you regarding metal roof installs. We’ve currently got a composition shingle roof that is 8 years old. I has some hail damage, but no leak problem at all. There is a local job we looked at that uses U panel on a new construction, and are giving some… ( read more )