In almost every case, the answer is yes, you can lay down a new metal roof over an existing shingle roof. This is one of the many reasons metal roofs keep growing in popularity – their installation doesn’t require completely tearing off the existing roof, which is a time-consuming and expensive job.
Is it OK to roof over existing shingles?
The answer is yes, you can lay new roof shingles over old ones. … You can’t do it with wood or slate, for example, and you should never mix materials, such as laying asphalt shingles over cedar shakes. Also, the old roofing has to be in pretty good condition.
Should I remove shingles before metal roof?
Considerations for Both Options. Your local roofing contractor may recommend tearing off your old shingles before installing a metal roof if any of the following conditions apply: Rough or uneven asphalt shingle roof will affect the metal roof’s appearance. The deck sheathing show signs of rot and would require repairs …
Should old shingles be removed?
If any areas of the roof have become severely damaged, it’s usually better to remove the old shingles and start from scratch. … If you’re going to add a roof on top of an old one, it’s a good idea to remove any loose shingles and apply a new layer of 30-pound roofing felt before laying the new shingles.
How many times can you shingle over a roof?
Depending on the type of roof material used, the number of layers added to a roof range from two to three times. House roofs should never exceed three layers of shingles. Adding additional layers without excavation can save homeowners up to $1,000 in labor.
Will bleach damage roof shingles?
Chlorine bleach / TSP chemical combination can kill plants, and the phosphates hurt the environment. Chlorine bleach also dries out a shingle roof causing curling, and ultimately shortening asphalt roof shingles life.
How do you extend the life of a shingle roof?
Top 10 Ways to Extend the Life of Your Roof
- Choose a reliable, qualified roofer. …
- Keep the gutters clean. …
- Remove leaves. …
- Trim any overhanging branches. …
- Keep an eye out for damage. …
- Have your roof professionally inspected and repaired. …
- Dislodge snow. …
- Maintain adequate insulation.
Can I clean my roof myself?
While technically you can clean your own roof, it’s not recommended. From personal injury to property damage, there are plenty of compelling reasons to leave roof cleaning to the professionals. Before you go grab your ladder and head out on the roof, consider why cleaning your own roof might not be a great idea.
What are the disadvantages of a metal roof?
Disadvantages of metal roofs
- Affordability. Metal roofs can be as much as two or three times more expensive than other roofing materials. …
- Noisiness. …
- Expansion, contraction and fasteners. …
- Inconsistency of color match. …
Can you put metal roofing on over shingles?
No, you do not have to tear off your shingle roof. Metal roofing can be installed over top of shingles. One of the major advantages of metal roofing is that it is very lightweight. This makes it a perfect material to be installed right on top of an existing shingle roof.
Can you leave shingles under metal roof?
In simplest terms: Yes, you can install a metal roof over shingles. … Building officials in some areas will only allow a re-roof over one layer of shingles, while officials in other places may allow you to place the roof over two layers of shingles.
Should you remove the plastic strip on shingles?
The film strips on the back of each shingle are to prevent sticking together of the shingles while in the bundle. Their removal is NOT required during application. … This strip prevents the shingles from sticking together in the bundles, and need not be removed for application.
How hard is it to remove shingles?
Although removing asphalt shingles requires less roofing knowledge and training than the installation of the new layer, it is still a lot of work. Maybe you’re not afraid of hard work, but also remember you’ll be working on a sloped surface, using tools you likely have never used before.
How long does a roof tear off take?
It can take as little as ONE day to tear off and replace an asphalt shingle roof. If it is a clear, hot, summer day, then a roofing crew of 5-6 can tear off and replace a 40 square asphalt shingle roof in a single day (a square is roofing terminology for shingles.