To avoid the extra mess, price, and inconvenience of a tear-off procedure, it was once usual (even standard) to lay new roofing shingles on top of existing ones. However, it is rarely done nowadays – and for good cause.

A roof is an important aspect of any building’s construction, especially when it comes to your home. Your roof shields you and your family from the elements, including strong winds, snow, cold, scorching heat, rain, and more.

When you replace old shingles with new ones, you gain a little convenience and cost savings in the short run, but you lose out big in the long run.

New Roof

Here are the top 5 reasons to always de-roof before new roofing:

1. Damage To The Shingles.

Asphalt shingles are supposed to lay flat to the roof decking, therefore they will not lay properly if they are installed over existing shingles. As shingles are more readily creased, cracked, or blown free in severe winds, their life duration may be limited.

2. Strain With Extra Weight.

Even one layer of shingles adds a lot of weight to your roof, which the rafters have to support all of the time. By adding two layers of shingles to that weight, you are putting undue strain on your building.

3. There Will Be No Decking Inspection.

If the old shingles aren’t removed, you won’t be able to fully check the existing roof in preparation for new roofing installation. Roofers can only see where plywood needs to be replaced or where a potential leak point has to be caulked or otherwise sealed after that.

4. Costs Will Eventually Rise.

While adding layers to your roofing may save you money in the short term, it may cost you the same amount or more in the long run when you have to remove two or more layers of shingles before installing a new roof. When you ultimately have to get rid of your doubled-up shingles, the expense of tear-off and disposal will be doubled!

5. Resale Value Depreciation.

Finally, having a two-layer roof is a major disadvantage if you plan to sell your property in the future. It can lower your home’s resale value and make it more difficult to find a willing buyer. After all, the new homeowner would be the one who would have to (eventually) rip off two layers of roofing.


If you’ve been told you need a new roof, there’s a good chance your current one has serious problems. Rather than re-roofing, it’s nearly always better to start over with a new foundation for your new roof.

It’s always a good idea to contact with a reputable roofer who can check your roof, provide an accurate quote, and advise you on the best course of action.

Before installing high-quality new shingles, we recommend completely removing the old ones. This will help you to get the most out of your roof while still receiving all of the warranty advantages.