How much overhang should roof shingles have?
The Guide
- Remove all old shingles and nails from the roof boards. Any nails left protruding can cause tears in the shingles that will allow water in.
- Remove any damaged roof edge flashing. Removing this now will save you time later on when the new shingles are installed.
- Remove and replace any damaged roof boards, or boards with signs of water damage. ...
How to reroof over existing shingles?
Re-roofing over old shingles can save you time and money since you will not have to rip off the old roof and pay to have it hauled away. Step 1 — Seek Professional Advice Contact your local government office to inquire about local codes regarding installing new shingles over old ones.
Can you put new shingles on top of Old Ones?
The short answer is “yes”, you can lay new roof shingles over top of the old ones, but there are other reasons to take into consideration. The Basic Rules Know this: placing old shingles over top of the new ones is only possible with asphalt shingles, which are also known as composition shingles.
How do you install roofing shingles?
This in turn will ensure that less energy is used to cool homes. Thomas says, “If you are thinking of installing a new roof, you should absolutely consider using asphalt shingles. They are easy to install, easy to repair and easy to maintain, on top of ...
Is it OK to overlay shingles?
A: In general, it is not good practice to overlay a traditional asphalt shingle roof versus a complete tear off and replacement for the very reason you stated: you can't examine the decking to determine if there is any damage that needs repaired.
Do you overlap shingles side to side?
When you reach a peak or hip, shingle all the way up the first side (until the reveal portion of the shingles is within 4 inches of the peak) and cut the 3-tab shingles just below the ridge. Shingle the other side and allow these pieces to overlap the ridge by no more than 4 inches.
Is it OK to put two layers of shingles on a roof?
In most states, you're only allowed to have 2 layers of shingles on a roof for fire safety reasons. However, you'll still see roofs that have 3 or 4 layers today. If you already have 2 or more layers, a contractor will recommend a full replacement.
How many times can you overlay shingles?
Two layers is the maximum in most areas, but some building codes allow only one. For example, towns in climates with heavy hailstorm activity or significant ice dam problems may not allow multiple roofing layers. 7. A re-roof might not look good on an inspection report.
How do you stagger shingles?
0:295:55How To Properly Start Shingle Courses On A Roof - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd that's your code here in Ontario we have a high wind zone. Code. So we'd have to put six nails.MoreAnd that's your code here in Ontario we have a high wind zone. Code. So we'd have to put six nails. So how you nail that is you go one at the end for evenly spaced in the center.
What do mild cases of shingles look like?
A mild case of shingles may include a red rash without blisters. The shingles rash and blisters are distinct characteristics of the illness. Mild cases of shingles do not usually cause headaches, fever, or fatigue. Whether mild or severe, pain is the most common symptom of shingles.
What is one of the drawbacks to adding second layer of roofing over first?
Adding a second layer of shingles will make your roof hotter because heat gets trapped between the shingle layers. Increased temperatures can lead to premature aging of the shingles. Layering new shingles on top of old ones, which might be curved or damaged, can result in some visible imperfections on your roof.
Can you put a third layer of shingles on a roof?
No, you can't put three layers of asphalt shingles on a roof. In most states, you're only allowed to have two layers of asphalt shingles on a roof for fire safety reasons.
Is it OK to put a new roof over an old one?
You can only install a new roof over an old one if the old roof is completely flat and level. Several factors might cause the existence of curling shingles; therefore, it is advisable to involve a professional roofer to determine the cause and replace the shingle before proceeding to a re-roof.
Is it okay to overlay a roof?
Yes. And in fact, that's the primary reason a homeowner opts for an overlay roof. Since an overlay roof is just put on top of the existing roof, your roofer's crew doesn't have to tear off your existing shingles, redeck the roof, or do as much cleanup.
Can you put a new roof over an existing one?
Roofing over an existing roof is also called reroofing or an overlay. It is the process where roofers install a new roof over your existing one, i.e. add a new layer of shingles, which means that there is no tearing off of the old roof.
Do I need to underlay before installing shingles?
Underlayments help prevent leaks from getting through to the wood underneath, so you should install it just in case.
What is the lowest air temperature for roof shingles?
You want to wait till temperatures are averaging 55 degrees before installing shingles. The shingles are suitable for cold and warm climates.
Does my first row of starter shingles extend over the edge to cover the drip edge?
This starter strip should line up with your drip edge. The drip edge is installed to create a straight roof line.