Metal Roof Installed Over Shingles? | West Michigan | 2024

Curt Visser explains and demonstrates why installing a metal roof over shingle layers as a quick fix is a really bad idea.
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[@woohunter1]

We have big overhangs and high winds, so I’m kinda glad we got our metal roof installed on top of our existing asphalt shingles. Extra sound deadening and extra weight are kinda nice. The roofing company did install purlings first then metal.

[@propertyrevolutionllc7346]

The perlins do help with some of the concerns mentioned in this video

[@waltermatthewberg]

I just installed a standing seam over shingles. I inspected the osb sheathing from the attic with a flashlight and it looked good. We used 1-1/2" pan screws and they were grabbing strong. I think it will be a good roof. I'll give an update in 30 years.

[@EdwinSchwartz-sv3cj]

It’s because the metal was installed directly on top of the shingles and it needs to have a 2 x 4 or a one by four installed on top of the shingles for the metal to be screwed onto if you do not the shingles will work like a sandpaper on metal and it will wear through and you do not put the screws into plywood or OSB. They will work loose.

[@orlandowiley1930]

I had a contractor tell me that samething. Wanted to leave my shingles on and then charger 14k to install. I told that man to get out my yard. 😂

[@propertyrevolutionllc7346]

That was a good call on your part

[@brentufkes6846]

Great insight!

[@propertyrevolutionllc7346]

Thank you!

[@baltazargaspar8233]

Good advice my guy! I hate seeing metal over shingles just lazy business practices.

[@jasonstarr6419]

Some years ago, I did exactly what you're saying not to do. However, I did not put the metal directly on the shingles. First, I installed horizontal 2X4 purlins attached down to the decking through the shingles, then spaced four feet apart, i inserted a 1" piece of foil faced styrofoam sheeting between each of the purlins. then attached the metal with 2 3/8" inch zinc SDST screws with rubber washers. Due to the steep pitch of the roof, no water penetration has ever been noticed. I was using 24g galvalume R-panels. It appears as if this roof was installed directly on the shingles, which, I agree, doesn't sound like a good idea. Oh, and the roof I covered was in good shape, no leaks known anyplace on the entire roof. Thanks. New Sub. :)

[@propertyrevolutionllc7346]

Thanks for subscribing. The method you described can work however we always recommend removing the shingles first to make sure that there are no underlying issues that get masked. Glad you project is performing well!

[@justinrampersaud1948]

Plan on doing this same thing to my cabin next weekend. Hopefully it works out well. What size nails or screws did you use to attach the 2x4 to the base?

[@natevanlandingham1945]

Sounds like it wasn't even half installed right so not all the metal over shingle fault. You don't just buy panels together then caulk between them. There is massive installer error here.

[@SH-sg8or]

Thank you. I almost made this mistake having a guy install metal over my old roof. When I brought up the facts you presented in this video you’d think I was insulting him. I have leaks currently from hail damage and think it’s highly probable that we have deck boards that are rotten….. the roofer said that makes no difference when putting metal over the top of it. I asked about securing new material and screwing into rotten wood…..he danced around that question. I’m opting for a new shingle roof so that I know the deck is properly inspected….. and I went with a different reputable company.

[@jasonstarr6419]

You might see that I posted elsewhere that I did go over existing roof, but in your case, unless the roofer can guarantee that he's not screwing into rotten decking, that's a red flag. I was fortunate that I was able to inspect the decking from the underside and knew I didn't have anything needing replacing from that perspective. But, I totally agree, the decking and trusses must be solid no matter what kind of roof you put on.

[@Drnardinov]

do you think that it may have leaked due to the fact that the fasteners were installed in the low spots? That's the big mistake. Guaranteed leakage. You have to put the screws in the high spots.

[@dylanconn6079]

Roofing company did this to me. We had to get a new roof per our home insurance because of age in Florida. The metal option was cheaper. I asked if they were gonna rip all the shingles off for that price and he said yeah. The day they showed up i gave them about an hour and they had half the metal already on over the shingles. 🤦🏻‍♂️ i made the call to their boss and it was a $3,000 upcharge to remove the shingles. I wish they were more clear upfront, because im getting drywall cracks in my ceiling all around the house. Thats alot of freaking weight up there being an 1800 sqft house

[@propertyrevolutionllc7346]

We hear these kinds of stories all the time. Property Revolution started as a real estate company, and added roofing, siding, decks, and fences because we had a hard time finding quality contractors in Western Michigan.

[@bigal25938]

Of course it’s going to go wrong screwing onto shingles. Install purlins first and it will be fine.

[@manifestmetalroofing]

The mistake was going directly on shingles. You must first frame-in horizontal furring that structural attaches to the rafters, then the decking issue becomes obsolete, because your metal is fastened to the purlins, not the decking. This also creates a breathable air gap, behind the Metal panel, which helps reduce condensation and keep your roof deck/attic cooler, because the reflectivity of Metal is greatly reduced when fastened directly to the deck, without an air gap. Certainly a poor excuse of an install here.

[@propertyrevolutionllc7346]

The biggest issue is that there was rotted decking that became covered up and became a bigger issue later on

[@Das_burrito]

Really looks like the roof was in bad shape from the start and not installed properly as you pointed out along the side wall. I wouldnt put all blame on the steel or shingles. I feel both ppl were crappy installers. Ive installed steel over shingles and have had no issues but the roof was also in good shape if the roof is crap i always tell owner we have to rip off shingles and start fron scratch.

[@propertyrevolutionllc7346]

For sure. There were definitely a number of issues to begin with that just got covered up.

[@Das_burrito]

@propertyrevolutionllc7346 true that. Sure gives roofers a bad name

[@sugardippedtitz]

I grew up in otsego, such a shithole, probably installed by methheads.

[@dougdiplacido2406]

Did they install purlins first or right on top of the old shingles?

[@propertyrevolutionllc7346]

On top of old shingles.

[@stewatparkpark2933]

Metal roofing is designed to be fixed through the ridges not in the valleys .

[@walshwoodworks8964]

That depends on the manufacturer but that’s not how it’s done in most states. We screw into the flats and never had an issue.

[@seangoff9578]

Lol this guy would have a hard time selling in my area. He's literally replacing a premium roof product with asphalt shingles. He's replacing an ok.roof with one that will need to be replaced after the first 1.5" hail. Yeah a poor insatll a poor install.but an asphalt shingles is literally the most fragile.roofing product yiu could put on a roof. 😅 he probably doesn't even know this.

[@propertyrevolutionllc7346]

Thanks for the comment. An agricultural metal panel nailed over shingles with rotten decking, that actively leaks in multiple areas is not what most would consider "Premium product". West Michigan is not typically a hail impacted area like southern parts of the country but even if it is hit by 1 1/2" hail, the ag panel is going to dent, which causes fractures to the metal. We each are responsible to educate and take care of our customers to the best of our abilities, so that is what we are doing here. A metal roof, correctly installed, is going to be superior to asphalt shingles, however we so often see them installed incorrectly and are trying to bring awareness to the issue.

[@Casmige]

No. Just don’t do it. Tear-off, Do it right the 1st. time or don’t do it at all. Why isn’t the previous roofer being held negligent & therefore paying for the replacement?, is that at all a possibility?

[@propertyrevolutionllc7346]

About four years had lapsed and the property had changed hands. So not likely a possibility at this point