In the course of 30 years, your old asphalt shingle roof has exhausted its lifetime. However, it wasn't one without issues that you needed to face. You had replaced missing shingles during one storm a few years back. In fact, you provide detail-oriented maintenance and inspections to make sure you nip all possible problems in the bud. Now, you're thinking of a new roof and are researching about how to install metal roof over asphalt shingles.
The instructions are simple enough for any Corpus Christi TX homeowner to understand. In fact, this is how Corpus Christi TX's most reliable metal roofing companies go through the actual process. MyRooff.com has one of the best instructions you can follow below.
How to Install Metal Roof Over Asphalt Shingles
STEP 1: GET A PRECISE MEASUREMENT OF YOUR ROOF SURFACE
Getting an accurate measurement will help you determine the exact amount of material needed.With a metal shingle system, you are placing small panels in horizontal rows, so you can do a quick back-of-the-envelope calculation of how many panels you will need once you know the total roof surface area.
You will need to measure and take into account valleys, dormers and chimneys on your roof. If you are installing a seam steel solution, you will also need to think in terms of each side of your roof.
STEP 2: LAY DOWN ROOFING FELT OVER THE ENTIRE ROOF
Your goal with the roofing felt is to make sure everything is as straight and as square as possible. To do this, you might need to put wood strips in place as well.
Also, keep in mind that flashing will need to be installed for dormers, chimneys or any possible seam where you are especially concerned about water. The key here is that you are aiming for a very square, symmetrical look without the risk of water damage later. (Continued)
Now that you know how to install metal roof over asphalt shingles, the next question is, should you go through with it? You might have fears about metal's weight and the lack of supporting structures needed to prop up the entire roof with the new material.
Fortunately, professional roofers perform inspections. During this activity, they observe the structural frame of the roof. They check for sagging, warping, and any malformed roof structures so they can address it before they go through the process of how to install metal roof over asphalt shingles. Livingston Roof Pros has a great post on how this works. Read more below.
How to Install Metal Roof Over Asphalt Shingles: So What Does a Roof Inspector Look For?
The first thing that the roof inspector will look at when they arrive at your home is how level the roof is. Sometimes the structural frame of the roof starts to sag and even warp in some cases. It’s much less noticeable on a shingle roof but would be extremely noticeable on a metal roof. Any sort of waves, dips, or rises will need to be examined because adding a metal roof over shingles that are not level will certainly show in the new metal roof. In fact, the seams may not even seal correctly if the problems are too bad. Other problems that may stop you from placing metal over shingles roof is problems with the roof decking. If your current roof was leaking and water has penetrated into the decking it may have made it weak. This would mean it may not be able to support the new metal. Although the metal is much less weight than shingle counterparts, it’s also easy to get blown away. Wind can rip the metal roofing from the home if it’s not securely fastened. (Continued)
If you're not comfortable about not removing your old asphalt roofing shingles and replacing them with a new one, you can always have it torn off and replaced. However, it's completely safe. In fact, you aren't just saving much money in doing so. You're helping the environment and guarantee no water damage, which happens often during roof tear-offs.
Todd Miller highlights the great advantages of going through the process of how to install metal roof over asphalt shingles. You can read more about them below.
Why Install Metal Roofs Over Asphalt Shingles Rather Than Remove Them?
- It stops the need to fill up landfills with old shingles. It ultimately increases the thermal resistance (R-Value) of the roof assembly, actually increasing energy efficiency compared to tearing off the old shingles. The benefit of this is during the summer.
- It allows the property owner to spend discretionary dollars on a better roof rather than on removing the old roof and disposing of it.
- Going over the old shingles also avoids the potentially damaging issues that can occur, like unexpected rainstorms, when old roofs are torn off.
Still, ultimately, it is the property owner’s decision but I would have no qualms about going over a layer of old shingles in most cases. It’s not uncommon to go over multiple layers either actually. On older homes, of course, I do put the caveat out there that if there are signs of an existing weight issue or old leaks, those need to be addressed and that may require removing the old shingles. If there are concerns about the integrity of the roof decking, then pull-out resistance tests using the roof fasteners can be performed. (Continued)
Remember, how to install metal roof over asphalt shingles seems easy to perform. However, without the right knowledge and equipment, you may have problem accomplishing your goals in a short span of time. In fact, you might compromise the lifespan and durability of your roofing materials. Allow Galvan Builders to help you achieve the results you need with metal over shingles installations. Learn more about what we can do by contacting us today!
Read Full Article Here: Corpus Christi TX Home Hacks: How to Install Metal Roof Over Asphalt Shingles
Galvan Builders Construction Company
4938 Williams Drive,
Corpus Christi TX 78411
361-857-4341
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