How to install peel and stick roof underlayment
Seams can be difficult to seal, and as you lay it, conventional felt is prone to curling and wrinkling. Every roof has its own challenges, some more than others.
Peel-and-stick underlayment comes with added flexibility, which makes it much easier to install around ridges, valleys and hips. First, each roll weighs less than conventional underlayment, which makes it easier to carry up and down ladders and to maneuver on the rooftop. Building codes differ from one place to the next, but in storm-prone areas, code often requires that extra measures be taken to ensure the safety of the roof deck.
As you can see, peel-and-stick underlayment solves a lot of problems. Your email address will not be published. Flexible Installation is a Huge Plus Every roof has its own challenges, some more than others. In Some Areas, Building Code Requires Special Measures Building codes differ from one place to the next, but in storm-prone areas, code often requires that extra measures be taken to ensure the safety of the roof deck.
Submit a Comment Cancel reply Your email address will not be published. Search for:.Log in or register to create Field Kits and Sales Worksheets. Why register? Install step and kick-out flashing at all roof-wall intersections to protect walls from water intrusion and install boot or collar flashing at all roof penetrations to protect roofs from leaks.
In multi-level house designs where roofs intersect walls, much of this water is channeled along the wall to a gutter.
If sidewall flashing is lacking or inadequate, water runoff can get inside the wall and cause serious damage. In big storm events, rainwater can often overflow the gutter and stream down the walls. Diverters are sometime fashioned onsite in an attempt to direct this water into the gutters. If undersized, these diverters are not very helpful.
If not properly integrated with the existing housewrap and cladding, they can do more harm than good by allowing water inside the wall cavities. The result can be significant damage to wall sheathing, framing, and insulation, and mold inside the wall cavities. While older wood siding would show evidence of this water intrusion by peeling paint, new wall claddings like fiber cement, vinyl siding, and brick veneer can mask the evidence for years.
Anywhere roof sections adjoin wall sections, step flashing should be used to keep water from entering the walls, and kick-out diverters should be used to direct the rainwater into rain gutters where it can be carried away from the structure. Proper flashing that is correctly integrated with housewrap and cladding along roof-wall intersections and kick-out diverters that are seamless and adequately sized to direct flowing water into the rain gutters are important tools to keep the wall cladding from being saturated by flowing water.
Kick-out diverters can be formed on site from sheet metal but these are often inadequately sized and have unsealed seams that fail over time.
Large, seamless, plastic kick-out diverters are commercially available. These materials would be installed by roofers in coordination with housewrap and siding installers. This task should be included in the contract for the appropriate trade depending on the workflow at the specific job site. Wall flashing and kick-out diverters are required in the and IRC R See the Compliance tab. Apply drip edge and roof underlayment over the roof deck and continue lapping up the sidewall and over the water-resistive barrier in this case rigid foam insulation a minimum of 7 inches Figure 2.
Place the seamless, one-piece, non-corrosive kick-out diverter as the first piece of step flashing. Slide the kick-out diverter up the roof plane until the starter trough stops at the shingle starter strip. The diverter must be flat on the roof and flush to the sidewall Figure 3.
Fasten and seal the diverter to the roof deck and starter strip. Do not fasten it to the sidewall. Place the first row of shingles and next section of sidewall flashing over the up-slope edge of the diverter, lapping a minimum of 4 inches over the diverter Figure 4. Sidewall flashing height requirement should be determined by a design professional and local building codes.
Apply self-adhesive flashing over the top edge of the wall flashing, diverter, and rigid foam insulation Figure 6. Apply drip edge and roof underlayment over the roof deck Figure 8. Continue lapping up the sidewall and over the weather-resistive barrier in this case housewrap a minimum of 6 inches. Place the seamless one-piece non-corrosive kick-out diverter as the first piece of step flashing.
The diverter must be flat on the roof and flush to the sidewall. Place the first shingle and next section of sidewall flashing over the up-slope edge of the diverter, lapping a minimum of 4 inches over the diverter as shown in Figure The sidewall flashing height requirement should be determined by a design professional and local building codes.
Apply self-adhesive flashing over the top edge of the wall flashing, diverter, and housewrap Figure Install the housewrap.Run a bead of waterproof caulk along exposed edges of the peel-and-stick roofing to increase watertightness. Install the roll roofing in warm and dry conditions to produce optimum adhesive performance. Check your manufacturer's instructions carefully because some products require the application of an additional adhesive spray along the perimeter edge of the flat roof.
Take considerable care on the roof in order to prevent injury or death from falling off. Applying peel-and-stick roofing in cold weather severely reduces the efficacy of the adhesive. Do not install the roofing onto a wet roof deck because the adhesive will fail. Typically, a flat roof is a low-sloping roof with a maximum 10 degrees of pitch or usually having a slope of up to 3 inches per linear foot for adequate drainage.
In this respect, peel-and-stick products are suitable for the majority of flat roof construction types and usually come with a year warranty.How to Install Roof Deck Protection and Underlayment - Mastering the Roof by GAF
Peel-and-stick roll roofing is a polymer and asphalt product, with a metalized or granular top coat and a self-adhesive underside, which purports to provide a faster installation time than traditional roll roofing materials.
Sweep the roof deck with a push broom in order to remove debris such as stones, leaves, twigs, moss and loose dirt. Use a degreaser to clean ingrained oily marks and dirt from the roof deck. Wipe the deck with a damp cloth in order to pick up any dust particles that remain.
Hammer raised nail heads into the roof deck to ensure a smooth surface for an effective installation of the peel-and-stick roll roofing. Read the roll-roofing manufacturer's instructions to determine if you need to apply an asphalt primer over the roof deck, because some peel-and-stick products adhere more effectively with a primer.
Align the length of roll roofing with the lowest edge of the flat roof and flush to the side edge of the roof. Pull back 6 inches of the release paper in order to position the start of the roofing sheet accurately. Smooth down the sheet with your hand to adhere the roll roofing to the roof deck.
Peel back the release paper and smooth down the roofing sheet as you go in order to prevent wrinkles in the asphalt membrane. Cut the roofing to size using either a utility knife or scissors, according to the roofing manufacturer's recommendations.
Use a hand roller to firmly press the roofing length onto the roof deck after you position each course. Overlap each preceding course by 3 inches to create an effective watertight lap for the flat roof. Overlap the edge of an end piece from roll to roll by 6 inches and stagger the laps between courses.
Residing in the coastal county of Devon, England, Jane Humphries has been writing since She received a Bachelor of Science, honors, in psychology with combined studies covering biology, statistics, economics, politics and sociology.
Hunker may earn compensation through affiliate links in this story. Tip Run a bead of waterproof caulk along exposed edges of the peel-and-stick roofing to increase watertightness. Warning Take considerable care on the roof in order to prevent injury or death from falling off. Peel-and-stick roll roofing is suitable for flat roof constructions. Step 1 Sweep the roof deck with a push broom in order to remove debris such as stones, leaves, twigs, moss and loose dirt.
Step 2 Hammer raised nail heads into the roof deck to ensure a smooth surface for an effective installation of the peel-and-stick roll roofing. Step 3 Align the length of roll roofing with the lowest edge of the flat roof and flush to the side edge of the roof.
Step 4 Peel back the release paper and smooth down the roofing sheet as you go in order to prevent wrinkles in the asphalt membrane. Step 5 Overlap each preceding course by 3 inches to create an effective watertight lap for the flat roof. Share this article. Jane Humphries. Show Comments.Roof underlayment is a necessity, but when you choose a self-adhered underlayment system the benefits are numerous. Discovering a product that improves your installation man-hours is surely a winner that you want to take advantage of?
If you are taking the leap toward a roofing revolution and giving self-adhered underlayment a go, you may need some assistance in how to order the products you need. Each product has different measurement properties that also need to be taken into account, such as the weight, diameter, coverage and dimensions of each product roll.
Simply give us the roofing specs and we can handle the rest — or take a look at our self-adhered underlayment product information guide.
Here you will find our basic chart of starter sheet calculations based on squares to help you decide how much of each product you will roughly need. Remember that our chart is merely an estimate and results can vary, depending on size of your roof.
PRO TIP: this is a nifty chart for the roofers and design professionals out there who are already self-adhered underlayment converts! If you need more information on how to install your underlaymentor if you have any further questions, then give us a call on or email info tag-stick. A proven mechanical attachment with self-adhering technology that can be installed with any steep slope roofing products.
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How to Apply Underlayment to a Roof
Other Info.It will just look like another shingle roof. But there are two special things about this roof. Unless we have a hurricane tomorrow that is.
Until recently, all shingle roofs had the same type of underlayment. The only way to improve the quality of the underlayment was to make it thicker or add another layer. You may have heard of 15 pound felt and 30 pound felt, the two most common thicknesses of that material. You peel off the backing as the material is rolled out, and stick it on. Like a giant roll of duct tape! And we all know that duct tape fixes anything. The problems we experienced with the old method of using a felt underlayment came at two points in the life of the roof only one for most roofs.
Peel and stick underlayment is stuck to the plywood with a strong adhesive on every square inch of the surface. In all but the most severe conditions, it stays down. In the above photo you can see the white backing that has been removed from the underlayment. This strength goes great lengths to resolve both of the above concerns. So much so that many insurance companies will offer a substantial discount if your home has a properly installed peel-and-stick self-adhesive underlayment.
I said there were two things about this roof that were special. The other is the thickness of the shingles themselves. I have a dumb question…I have a very leaky 30 year old mobile home that we are renovating.
What is the difference between this peel and stick underlayment and peel and stick roofing? Would the underlayment act in the same way if we kool sealed afterwards? Do you have an suggestions on the difference of applying the peel and stick underlayment vs.
I help manage a roofing company and the new guys have not used it before. We had a guy slide off the other day. If the product is applied directly to the plywood, how difficult is it to remove and replace when reroofing? I would be surprised if it was easy to remove.
I would not be surprised if it was very difficult to remove.
6 Benefits of Peel and Stick Underlayment
But the best people to ask would be the manufacturer of any given particular brand of peel-and-stick.If you are looking for a suitable roofing felt for your home, and want to get the best available, then you may be torn between peel and stick roofing underlayment and felt roofing paper. The former is a modern invention which is designed to be more easy to place on a roof, and need less professional assistance.
However, both these types of roofing felt have pros and cons. This type of roofing felt is often used for materials that need to be enhanced in some way, so that you might find a peel-and-stick which allows a high temperature suitable for metal roofs, or one which has a water shield, placed below fiber cement roofing.
On the downside, this type of roofing material is very expensive, and it can be difficult to obtain. Felt roofing paper is a traditional roofing material which is used by professionals and amateurs alike.
If you want a cheap and easily available underlay for your roof, then you are probably interested in this material. However, felt paper made from natural ingredients can be effected by rain and cold, causing it to rot or wrinkle.
Felt Roofing Paper Felt roofing paper is a traditional roofing material which is used by professionals and amateurs alike. Popular Articles. Pros and Cons of Asphalt Rolled Roofing. Pros and Cons of Foam Roofing. Types of Roofing Materials that Require How to Install Shed Roof Felt.Installing roofing felt, or "tar paper," is an important step when roofing a building. Here's how to do it. Before applying roofing, you'll need to cover the sheathing with roofing felt, also often called "tar paper.
Some roofers prefer to attach felt underlayment with 1-inch roofing nails or special nails with plastic washers, but most codes allow staples, which are easier to drive. For the lower portion of the roof—especially the part that overhangs the eaves and is susceptible to ice dams—it is a good idea to apply self-stick waterproof shingle underlayment WSUalso called ice guard. Underlayment, flashings, and shingles all work together and must be installed in the correct order.
If you lay the felt perfectly straight, you can use its lines instead of horizontal chalklines to align the shingles. Do not use felt as a temporary protection against rain: If it gets wet it will wrinkle, making it harder to shingle. If you need to temporarily protect a roof, cover it with plastic sheeting or a tarp.
When working with a helper, expect to spend several hours to install drip edge, WSU, and roofing felt on a medium-sized roof. Apply drip edge to the eave. Cut drip edge flashing at an angle at the corner, press it lightly against the eave end not too hard or you will misshape itand drive a nail near the end. Use a chalkline or align it by eye to make sure it is straight, then drive roofing nails every foot or so to fasten it to the sheathing.
Where drip-edge pieces meet, overlap them by at least 2 inches. Where the drip edge meets a valley or a hip, cut the pieces with overlapping tabs. Press the tabs firmly to make crisp corners with no gaps and attach with roofing nails. Where you meet a hip, apply felt up to the hip and cut the pieces so they fit snugly. Then apply a vertical course of felt along the hip that overlaps on each side.
Snap a chalkline to help you align the WSU or felt.
How to Install Peel & Stick Roll Roofing on a Flat Roof
Check at several points to make sure the overhang is consistent; it does not have to be perfect, but you may need to realign the drip edge. Using the chalkline as a guide, roll out about 12 feet of WSU smooth and free of creases and bubbles. Often you can reroll it, then unroll it while peeling off the paper backing.
On a steep roof, you can adhere the bottom half first, then pull off the backing from above. Avoid creases and stay aligned with the chalkline. Press down to tightly seal the WSU. When the weather promises to stay dry, many roofers prefer to install underlayment as they go. Apply one or two courses of WSU or felt, install the shingles, then apply more felt when you come within 6 inches of the top edge.
No matter which valley method you use, for extra protection apply WSU at a valley. Snap chalklines on both sides for guides. Roll out and smooth the WSU and drive a few nails on one side to hold it temporarily. Fold over the other side and peel off the paper backing.