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Table of ContentsIs It Ok To Install New Roofing Shingles On Top Of Old OnesNew Shingles Over Bad? No!– Home Preservation ManualReroofing Over An Existing Shingle Roof: Some Need-to-know BasicsInstalling Asphalt Shingles Over An Existing Shingle Roof

Construction business don't constantly use the highest quality products, so if you bought an old home, a roof replacement is a great opportunity to upgrade. Before work starts, your roofing contractor can help you select the ideal products for your roof. You may wish to switch from OSB (oriented strand board) to CDX plywood decking or utilize a synthetic roofing underlayment rather of felt, depending on which is best for your roofing's structure and your climate conditions.

Throughout a tearoff, your roofing professional will have the possibility to thoroughly analyze all parts of your roofing and make repairs to stop any establishing problems prior to they cause major damage. A brand-new, correctly set up shingle roof can last 20 to thirty years, meaning it could possibly last longer than an overlay by a decade or more.

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This makes a tearoff a smart option if you're planning to offer within the next few years. Any boost in the evaluated value of your house depends on the condition of your existing roofing system. You'll see a greater increase by replacing a weakening, leaky roofing system than by changing a roofing system with only cosmetic damage.

The Diy Guide: How To Replace A Shingle Roof Yourself

It takes a lot more labor to completely remove all the existing roofing material and then replace all the layers got rid of. The old roof likewise has actually to be disposed of effectively, which contributes to the expense. cherokee4/ Adobe Stock With this quicker, cheaper option, brand-new shingles are installed on top of the existing shingles.

Tear-off Vs. Re-roof

Due to the fact that there's a lot less labor associated with simply setting up brand-new shingles over old ones, an overlay will cost you less than a tearout. Your roofing contractor will not need to lease a dumpster and handle debris disposal regulations, so you'll minimize expenses there, too. If you're planning on completely changing your roof within the next 5 to ten years, an overlay is a practical way to enjoy the appearance of a brand-new roof in the meantime.

An overlay can be ended up days quicker than a tearoff. That's less time you'll need to spend out of the home, conserving you money and stress. Compared to a complete roofing system replacement, there's a lot less that can fail throughout an overlay task. There's no threat of a sudden storm hindering the dry-in procedure, no falling particles that could damage your deck or your vehicle, and no huge dumpsters that could damage your landscaping.

The issue is that without getting rid of the shingles, your roofer can't properly analyze the roofing to find out what condition it remains in. A knowledgeable roofing contractor may still be able to area indications of covert damage or make a good guess based upon your roofing system's age, however you're depending on luck at that point.

How To Install Architectural Shingles Over 3 Tab Shingles

To make matters worse, a roof with two layers of shingles holds in more heat, which speeds up degeneration. On average, an overlay lasts around 16 years. That said, for a lot of shingles, the service warranty stands for the exact same length of time whether the shingles were used in an overlay or a tearoff.

How To Install Asphalt Roofing Shingles

If your house is older or just somewhat structurally unsound, an overlay might not be a practical choice. Opportunities are your old shingles have actually suffered a reasonable amount of wear that's left a few of them torn, curling, or unequal. Those harmed shingles supply a substandard base for new shingles, so your new roofing system could turn out noticeably flawed no matter how proficient your roofer.

If you're unhappy with the overlay, you might end up paying for a tearout to have the entire thing redone before you prepared. Another layer of shingles includes another layer of intricacy to your roof. This makes it harder to track down the origin of any issues that develop. If a leakage kinds, the water will move through both layers of shingles, changing direction in such a way that conceals the source.

For the most part, unless you make certain your existing roofing system remains in good condition, a tearoff is the better option. The lower expense may make an overlay noise tempting, but if it leaves damage remaining under the new shingles, it puts your whole house at risk for wetness problems.

The short response is yes, you can lay brand-new roofing shingles over the old ones. Let's have a look at why some house owners go this path and after that we'll consider a couple of reasons we don't suggest it. However prior to we begin, something must be clear: adding new roof over old (sometimes called a "roof over or re-cover") is possible just with asphalt shingles (likewise called "structure shingles").

Re-roofing Over Architectural Shingles

Likewise, the old roof has to be in respectable shape. Including extra layers does not make a brand-new roofing system any more water resistant, on the contrary, it often develops its own issues. The factor some property owners select to do it is to conserve money and time. By keeping the old shingles on, they avoid the unpleasant and labor-intensive tear-off step and they will conserve some money on the roofing project.

Getting rid of the tear-off and disposal can easily conserve $1,000 to $2,000 depending on the size of your roofing, however you're actually simply delaying the cost: when it's time to change the roof once again and you have no option but to remove the existing shingles (2 layers is the optimum enabled in the majority of areas), you'll have to pay additional for the two-layer tear-off and disposal.

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The following list consists of some factors not to do a roofing system over in addition to some things roofers Tucson - DCRoofingArizona.com to take a look at if you're seriously considering including a second layer of shingles. Asphalt shingles are meant to be installed over a plywood deck. When adding a second layer of shingles, the bumps or flaws from the old roofing system will move to the brand-new layer.