If you are looking to sell your home, this is a major. Fitting new roof shingles over old ones is a definite no-no. It lasts just as long. However, you can only install new shingles over asphalt shingles that meet the re-roof conditions. Install a layer of roofing felt over the roof before you begin installing the new shingles. Usually to go over it the roofing company doesnt give a warranty. Best Answer. Choosing siding can simplify your home’s maintenance needs. However, you can only install new shingles over asphalt shingles that meet the re-roof conditions. Water damage to the deck or mold issues might be left untreated if they remain hidden under the existing roof. Even on a reroof the staples are doing some of the bonding but it is really the "glue" on the shingles that hold them flat. Cut the final roof cap shingle in half, trimming off the unfinished side of the shingle. You must. If re-roofing is done. Its job is to waterproof the breaks in your roof line. Roofs can last up to 30 years in extreme climates like the ones we live in, so the average life expectancy is 12-15 years. That new layer of asphalt on top of the old layer of asphalt acts as a heat sink. The thinking is that this will save time and money, and it will also extend the life of the roof. Roof-over can create difficulties in properly securing the top layer due to existing bumps and indentations in the old shingles. The cost can vary depending on whether or not the old roof is removed. In some areas, regardless of the roofing material you choose, you cannot install new roofing materials over old ones. Roofers will spend fewer hours on labor and clean-up since they wont need to tear off your current shingles. Felt/underlayment/tarpaper is used for only a few things. Of course, installing a new roof properly – whether a tear-off or roof over – requires the proper equipment, knowledge, and time. Eventually, the oily material over your asphalt shingles will evaporate, leaving them less water-repellant and flexible. The short answer is yes. Installing a new roof is a sizable investment and most homeowners want to ensure that they’re being wise with their money. Benefits of Reshingling Laying new shingles over the old ones comes with a slew of benefits. The surface of the old shingles is warped, curled, or so badly weathered. Increased Space. That extra weight is a lot of stress on the framing of the house. yes you can place new shingles over old shingles as long as the first layer of shingles are not curled. Also, you cannot mix materials; for instance, you cannot install shingles over wood tiles or slate. If conditions are right, new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. That works out to 68 percent of the investment. SUBSCRIBE to This Old House:. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. That is also why building codes generally limit re-roofing. When new roofing goes on, your home looks perfect. The layers of felt should be overlapped by 1 inch as you work toward the roof ridge. Is it OK to put shingles on top of old shingles? The Basic Rules. When you do, be sure to use a heavy-duty adhesive to seal the edges of the new shingles to the old ones. It is the process where roofers install a new roof over your existing one, i. Laying new shingles over old ones is generally less expensive than tearing off the old roof and placing a new one. Metal roofs have a lifespan of two to three times longer than asphalt shingle roofs. If it's time to replace your old asphalt shingle roof, one of the decisions you may be facing is whether to put new roofing shingles over your existing roof (a "recover") or tear off the original and start afresh. If your current roof is made of less sturdy materials like asphalt shingles and you opt for a stronger option like metal or clay. There is some rotted wood I plan to repair and possibly put a different roof on later. Figure 1: Roof Edge Detail—Overhang extended to hide the thickness of the over. In this case, putting new shingles over the existing ones may not be wise. You are right to question that. Disadvantages of Two Layers: Weight: Two layers of shingles add extra weight to your. Nope. Experts generally discourage adding new shingles over old ones. . Pro: You can save a lot of money. This framing system can be. The contractor just put new roof shingles over the old one. Also, the old roofing has to be in pretty good condition. Can you put a new roof over an old one?The answer is yes, you can lay new roof shingles over old ones. Putting a safe roof over your head isn’t necessarily a one-time deal. Place a screw about every 12 to 16 inches apart. This can lead to increased rot, mold, and decrease the structural integrity of your home. Use your best judgement of. If you want to make sure that you. Shingles are significantly less expensive than tile. add a new layer of shingles, which means that there is no tearing off of the old roof. Or is it? Reshingling The first step is determining whether you can reshingle is a proper roof evaluation. This channel is for educational purposes only. Instead, the contractors will use a roofing shovel to carefully remove the existing roof material, then dispose of it in a roll-off dumpster bin. Also, you cannot mix materials; for instance, you cannot. Building codes are in place to ensure the safety and quality of construction, and ignoring them can result in fines, complications with insurance claims, and even. 5-degree pitch. Although placing new roofing over old may be allowed by some codes, “roofovers” tend to be inferior and won’t last as long as a roof installed over stripped sheathing. Reasons Not To Put Shingles On Top Of Shingles. As a cost-saving measure, some may look to eliminate the cost of the tear-off of the old roof by simply roofing the new roof over the old one. Starting the Shingles. Inadequate preparation can cause the new roof to fail. In these areas, it is necessary to cut out the bad plywood or OSB before the installation of new underlayment and shingles. It's a heat issue. Finally, install the shingles over the flashing. Apply roofing cement – Scoop up roofing cement with a trowel and spread it along the edges. How many layers of shingles can you put on a roof? Most building structures allow two layers of asphalt shingles on their roofs with a 4/12 pitch or less. Tear-off and disposal of old shingles can be a labor-intensive and expensive process. Use the 1 ½ galvanized metal screws to secure the panel to the decking. Easy roof. If your roof is already covered in mold and algae, however, and you’re insisting on a layover, Proven Contracting will simply turn the job down. The cost of labor for the installation of metal roofs is also higher. Pros Adds value: When you put in a brand new roof, your home's resale value and curb appeal increase. Installation is easier than for a tear-off job because you. If you need a specific type of shingle for your roof or it’s more than a few years old, you may have difficulty ordering shingles that perfectly match the current ones. What is a roofing shovel called?If your shingles are showing indications of wear and tear, may be wondering if you can simply put new shingles on top of the old ones. Is It Ok To Put New Roof Shingles Over Old Ones. During a rain, the roof also becomes slippery, which can cause hazardous conditions for the roofer. Many manufacturers of asphalt shingles will void the warranty on their product if it is installed over old shingles. In the State of Florida. Also, the singles can come out and thus are missing, they begin to crack (Would need replacement) or you begin to find a lot of granules in the gutter. In 1995 that seemed pretty good. Advantages of Reroofing Most building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4/12 pitch or less, and three layers on steeper roofs. […]Some people believe that it is perfectly fine to install new roofing over old shingles, as long as the old shingles are in good condition. If you already have 2 or more layers, a contractor will recommend. Step 2 – Remove Old Deck. GAF shingles can be installed over existing strip shingles, T-lock shingles, wood shingles,. One layer of shingles and roofing material will weigh about 2 tons. To get in touch with one of our project managers, give us a call at 901-854-3402 or click here to set up a free inspection. Atlas is another leading company that produces roofs, siding,. If there’s any curling of the old shingles, the new shingles will not lay flat. This process, known as “re-roofing,” or “overlay,” can save time and money, as it eliminates the need to tear off the old shingles and dispose of them. The tear-off is necessary. It will not look good. Increased property value – A brand new roof can add more than $10,000 to your home’s resale value and also acts as a strong selling point. Please click "show more" below, to know. 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. However, you can choose a color that complements but contrasts the exterior elements of your home. Step 3 — Cover the Old Shingles. It helps water flow off the roof and onto the ground without running down the side of your home. You are correct that second layers typically don't last as long as single layers. Roofing, Gutters and All Waterproofing Anywhere - Putting on second course over moss/mold covered shingles? - I need to add a second course of asphalt shingles to an old garage with very old (first course) shingles. Beveled wood pieces called “horsefeathers” must be laid along the thick edges of the shakes to make a fairly flat surface. For example, if a shingle is cracked, torn or broken, it is important to replace the shingle or to use roofing. 3) Recycling Flashing. Additionally, any pre-existing issues with the old shingles, such as curling or rot, can transfer to the new layer and compromise the roof’s longevity. Roofing Over Existing Shingles This article discusses retrofitting step flashing on a re-roof where the contractor left the old flashing in place and did not install new sidewall, step flashing. Tear-offs involve the total removal of your existing roof. The following list includes some universal reasons not to reroof as well as some considerations or things to check out if you're seriously considering adding new roof shingles over old ones. The average cost to replace a metal roof is $5,500 to $12,000, depending on the size and slope of the roof. Please click "show more" below, to know. A tear-off roof costs more, but lasts longer and addresses roof issues. It has the same manufacturer’s warranty. The only exceptions are if you have a wood or slate roof. Installation is easier than for a tear-off job, since you can use the. The next step involves the removal of the old roof deck since it will be easier to replace this first and then put new shingles on top of it. You can find this type of cement at the local hardware store. Shingle roofs cost an average of $8,500–$24,500 for a 2,000-square-foot home, including labor and materials. Rather than removing the old shingles and ripping out the old flashing and sealing, roofers simply cover them with a new layer. Adds value: When you put in a brand new roof, your home's resale value and curb appeal increase. If the decking of the roof itself is warped, or if you lay new shingles over old ones, the "waviness" seen on your roof can make it difficult for the new shingles to fit snuggly against the roof, making it difficult for them to seal properly. //. The underlying old shingles may trap heat, causing the new shingles to deteriorate faster. It can save you a little money up front, but could lead to bigger problems and. Sunday, October 8, 2023Steel roofing costs an average of $6 to $12 per square foot. Ideally, merely clear off the old shingles and then put on new layers. If your shingles show signs of wear and tear, you might be wondering whether you could simply lay new shingles over the older ones. ft. Increased temperatures can lead to premature aging of the shingles. It is important to know that this process can only be done once because you can only have two layers of. It may seem cheaper, but this will cause problems as old shingles’ added weight and moisture can damage your roof. EMERGENCY ROOF REPAIRS. An overlay is less expensive, but masks problems and adds weight to your roof. The biggest drawback to installing new shingles over old ones is that it will most likely void your warranty. The main advantage of leaving the old roof on is obvious—you can minimize the mess, removal costs, and disposal expense if you can leave the old. 8 / 12. With a roof overlay, you lay new shingles over old ones rather than tearing them off first. Press the patch into place over the damaged area. Another disadvantage to installing new shingles over old ones is that you. Call us at (720)-712-3516 for a free roof inspection, and estimate of roof repairs. After framing and sheathing the new addition’s roof, snap a line over the existing roof shingles. Yes, you can (with asphalt only), but we would never recommend doing so. If an average bundle of architectural shingle weighs between 65 and 80lbs, an average roof size of 20 squares (2,000 sq. As a result, you'll typically lose one-quarter to one-third of the. The answer is yes, you can lay new roof shingles over old ones. While not removing the old roofing materials is an excellent option in many cases, the building code in your location will dictate whether you can put a metal roof over the shingles on your home. You do add excess weight to the roof framing, which can cause the decking and/or roof joists to bow and cause a ripple effect in the roof. Many shingle manufacturers have specific guidelines regarding installation procedures. If your shingles are showing indications of wear and tear, could be wondering if it is possible to simply put new shingles on top of the old ones. In these areas, it is necessary to cut out the bad plywood or OSB before the installation of new underlayment and shingles. After replacing it, we’re ready for the edge metal and ice shield. Good-quality composite shingles can weigh 350 to 450 pounds per “square” (100 square feet of roofing, installed). That would prevent the new shingles from laying properly, weaken them, and ultimately shorten their lifespan. This makes a tearoff a smart choice if you’re. . But if you have an old home with a decaying roof, especially a low-pitched roof, removing the old roof and replacing it may not be practical. One of […]If you want to re-roof an old roof with existing board sheathing and existing asphalt shingles, the first step is to strip off the old shingles and inspect the boards. Obviously, during the tear-off, we spotted the leak and were able to change out the rotted wood and re-flash the area. Charlie. 3 – Insert pre-formed flashing around the vent, then glue with plastic roof cement. Do roofers put new shingles over old ones?Pros and Cons of Adding a New Roof Over Old Shingles. Supervisor. In this case, putting new shingles over the existing ones may not be wise. However, you’ll still see roofs that have 3 or 4 layers today. Is it okay to put new shingles over old siding? No, you should remove old shingles or siding before adding new ones. If conditions are right, new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. Installation is easier than for a tear-off job because you can use the existing shingles as guides for laying the new ones. It's not ideal to install new shingles without removing the old ones, but follow this pro advice if you do. Rest assured that you will receive quality roofing services. It’s important to remember that putting new shingles on. Installed new shingles over a fully adhered membrane and the house looked pretty darn good (Photograph 3). Proper typing is necessary. Roof Material Upgrade: One of the most common reasons homeowners choose to replace their roofs is to upgrade to more durable and resilient materials. Not all pros recommend roof overlays because they can cover up damage instead of addressing the problem. Fine Homebuilding Project Guides Roofing Guide Home Chapter Installing Asphalt Shingles over an Existing Shingle Roof It's not ideal to install new shingles without removing the old ones, but follow this pro advice if you. 10. 1 – Install shingles right up to the vent pipe. Pros of Overlaying New Shingles on Old Ones. Do roofers put new shingles over. I. read more. Flashing is made of thin metal sheets. It’s easy to put new shingles over your existing shingles. Q& a: Is It Okay To Put New Shingles Right Over Old OnesThis is a short list of pros and cons for choosing a re-roofing job: Pro: Easier than a tear off. Lots of Arizona house owners with shingle roofings do decide to roofing over their existing shingles due to the fact that:. If you choose to cover your existing shingles with new ones, there are a couple reasons why this is a positive solution. The process of installing a new roof over an old one is called re-roofing, while tearing off the old roof to install a new one is called roof. You already have two layers of roof. A recover option is one way to reduce your short term financial outlay, but is not always the best investment. If there’s any curling of the old shingles, the new shingles will not lay flat. Tom: Oh, you should put new felt paper on. A tear-off roof costs more, but lasts longer and addresses roof. Along the gable end here, one spot was fragmented, so we cut it out and replaced it with some 1×6 pine. Then, mark it with chalk.