This gap also keeps moisture from building up in between the layers of your roofing. If the metal roof ever leaks, the shingles will keep your roof safe if there’s a gap.
If you install metal roofing over a damaged shingle roof, the added weight of the new roof may cause the shingles to weaken and collapse over time. If shingles are damaged, a contractor will need to inspect the surface underneath anyway, so the shingles will need to come off no mater which way you swing it.
The most popular underlayment is 30# roofing felt. Some contractors will lay plywood over the battens and then nail the felt to that before installing the roofing. [4] X Research source This adds a lot of weight though, so this step is often skipped if the shingles are really thick.
If the shingles aren’t healthy, you’ll have to remove the shingles first. The batten installation is really the only component of the process that makes it different from a standard metal roof installation.
If the grooves on the metal panels aren’t flush when they’re laid side-by-side, you’ll need to cut them so that the seams match.
Cover each screw or nail that you can see with a rubber grommet to protect the tiny gaps between the fasteners and the roof from letting water in. As far as roofing projects go, metal roofing is relatively easy and fast to install. It’s a lot easier to just lay metal sheets down next to one another than it is to lay individual shingles or securing rubber slate.
Expect to spend anywhere from $15,000-60,000 on metal roofing depending on the size of the roof and the material you choose. Yes, it’s expensive, but you won’t need to repair your roof for at least 40-50 years![13] X Research source You can try this without roofing experience if you’re just working on a shed or something small like that, and the fall risk isn’t particularly dangerous. [14] X Research source
Depending on where you live, you may not legally be allowed to redo your roof if you aren’t a licensed contractor. [16] X Research source Roofing contractors often provide free quotes. Reach out to multiple contractors and meet with them to see what they’ll charge for the project. Make sure that they’re licensed with both the city and state!
The main reason this isn’t a giant concern on a single layer of shingles is that metal roofing is usually relatively lightweight. So long as you only have one layer of shingles and your home isn’t super old, this shouldn’t be a huge risk.
The noise shouldn’t be particularly noticeable when you’re inside if you left the shingle roof on. There will be enough insulation to dampen the sound. If you want to save money on metal roofing, consider aluminum or galvanized steel. These are the cheaper options when it comes to residential metal roofing materials. [19] X Research source If you’re installing roofing on a shed or something small, go with corrugated steel. This will be the cheapest choice. [20] X Research source However, the most cost-efficient way of roofing is using asphalt shingles. [21] X Expert Source David BitanRoofing Contractor & Maintenance Professional Expert Interview. 14 July 2020. Repairing the roof is very cheap because repairs usually do not last long. If the roof is more than 15 to 20 years old, it may be better to replace the entire roof. [22] X Expert Source David BitanRoofing Contractor & Maintenance Professional Expert Interview. 14 July 2020.
