how to starter course shingles over existing 3 tab roof

by Lola Bernier IV Published 2 years ago Updated 1 year ago 4 min read

Part of a video titled How to Reroof Over Existing Shingles - YouTube

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Begin with a starter strip remove the tabs plus enough from the top of the starter strip. So thatMoreBegin with a starter strip remove the tabs plus enough from the top of the starter strip. So that the remaining portion is equal in width to the exposure of the old shingles. Apply the starter strip.

Can you shingle over 3 tab shingles?

In most cases, you can apply a second layer of three-tab shingles over an existing roof that features three-tab shingles without having to tear off the existing roof. However, you cannot apply three-tab shingles over architectural shingles.

How do you overlay shingles on a roof?

2:078:51HOW TO | Recover over old shingles - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo we cut we're cutting new ridge vent in and then as far as the bottom section goes this is oneMoreSo we cut we're cutting new ridge vent in and then as far as the bottom section goes this is one step that I feel a lot of people forget to do I'll see people like laying new eyeshield over and

Is it OK to put a new roof over an old one?

While a repair job can often be more convenient and somewhat more cost-efficient, placing new shingles over old ones is never a good idea. Whether repairing one section of roof, or a replacing a whole one, it's always best to pull up the old shingles before putting down the new ones.Jul 11, 2017

Is it OK to put a second layer of shingles on a roof?

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.Aug 24, 2018

Can you build a roof over an existing roof?

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.

Can you shingle a roof over old shingles?

Installing a new roof over shingles takes less time than tearing off the old roof. Looks just as good and lasts as long. As long as it's done right and under the right conditions, installing new shingles over old ones can last as long and look just as good as a complete re-roof. Has the same manufacturer's warranty.Sep 16, 2014

Can you put a second layer of shingles over architectural shingles?

The quick answer is yes you can re-roof architectural shingles over existing architectural shingles (however you must check with the shingle manufacturer as well). Having said that it will be nearly impossible to get a good looking quality installation.

Do you have to tear off old shingles?

In most cases, more than two layers of roofing shingles does require a tear-off. Laying new shingles over old shingles is easily prone to leaks and reduces the life of the new shingles. This alone ought to be reason enough to do a tear-off; it's just a bad value not to.Aug 23, 2021

How long does overlay roof last?

around 16 yearsWhat is this? Shorter lifespan – As you might expect, new shingles laid over damaged shingles and rotting decking won't last as long as they could. To make matters worse, a roof with two layers of shingles holds in more heat, which speeds up deterioration. On average, an overlay lasts around 16 years.

How do you install architectural shingles over 3 tab shingles?

1:095:21How to Reroof Over Existing Shingles - IKO Blueprint for Roofing Part 9YouTubeStart of suggested clipEnd of suggested clipPlace the top edge of the new shingle against the bottom edge of the tabs of the old shingle in theMorePlace the top edge of the new shingle against the bottom edge of the tabs of the old shingle in the course above. Although the exposure of the first course is reduced when using this method.

How many layers of roof shingles are allowed?

2 layersIn 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.Sep 10, 2021

How do you add a second layer of asphalt shingles?

0:044:42PROPER WAY to install A SECOND LAYER OF ROOF OVER ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipMake sure you remove the pipes flashings. And then put new felt on and make sure you clean the roof.MoreMake sure you remove the pipes flashings. And then put new felt on and make sure you clean the roof.