However, the process can be tedious, as you must constantly stop and reload the nail gun, adding more time to your roofing project. All of these methods could allow water through the roof. Tack or fasten roofing felt using stainless steel to T50 staples or 7/8 to 1-1/2 hot-dipped galvanized or aluminum 12-gauge shank roofing nails with a 3/8 head diameter. They arent connected, as they are with screws. It is important to note that the nail and staple roofing felt have these outstanding qualities. Please refer to our Legal Notices for U.S.A. or our Legal Notices for Canada. Also, you can use an aluminum or copper nail, depending on your location. Aluminum is a weaker metal than steel and copper. A nail gun is the best way to install roofing felt nails. Staples can be used for tacking it down, but not recommended to hold. If you take off a shingle for repairs or take off the whole roof in preparation for a reroofing job, youll have a ton of roofing nails on hand. Use a utility knife or hook-bladed knife to cut the felt. On the flipside, if you rush through the initial steps, the felt installation can be compromised by sloppy oversights such as stray nails. 1. For slopes between 2/12 and 4/12, double the resulting area value and then divide by the area a roll of felt covers. Upper lengths of edge flashing should overlap lower lengths by a minimum of 6. 1. In addition to these, nail felts are made from steel and used only to secure the roofing felt underlayment. It is required to block any rain that gets under or between shingles from penetrating into the wood decking. Nails will also be required for any roofing project. Estimating your roofing materials is key to your success, so youll want to know how many nails youll use in a square. You want roofing nails with plastic washers for roof underlayment. Is it necessary to use adhesive? Installing roofing felt is easy to install and is the first step to protecting your roof decking and home. Give it the essential venting. Consult your local building department for specific nailing applications. The information on this website is subject to change without notice. Roll the first large piece of felt over one side of the roof, allowing the excess to overhang. Check the requirements for the roofing material that will go over the felt. (Must Read This), Pressure Treated Lumber For Roof Rafters (Lets See), Roof Sheathing Horizontal Or Vertical (Must Read). Trim the felt, so it is flush with the face of the drip edge. The last part of the extended eaves edge flashing is folded back over the rake edge and nailed into place, thus sealing the exposed corner of the drip edge. Roofing felt nails like cap nails are generally more expensive than staples. The roof decking should be completely clean and dry. When you arrive at the rake, the paper should be cut flush with a knife and then adjusted to line up with the chalk line. Common nails, or even wood screws, may be acceptable nails for OSB roof sheathing. Defer putting drip edge on angled gable ends until after the felt is laid, so the metal edge will block wind from lifting the felt. Shank type: smooth, ring, screw. You should check with your building code and local bylaws to confirm. Dry sheathing and felt paper also help ensure a watertight roof in severe climates. (Explained), Or Drywall For Ceiling (All You Need To Know), How To Overlap Or Hang Drywall On 45-Degree Corner? Nail the felt in using 0.59 inch (15 mm) galvanized clout nails. However, you may find they are more expensive. Screws leave small gaps in the material they are driven into, and this may be enough to allow for a leak. Nails for roofing felt are also more expensive than typical nails. Use a construction stapler or a hammer. This is essential in windy conditions or in areas that experience severe weather conditions. I will also need to overlap the felt, how much overlap should I use? Felt nails are less visible than staples. It is important to note that local building and fire codes may require cap nails instead of staples, so check the fine print. $7.18 $ 7. Are you looking out for ways of preserving your roof rafters to enable them to stand the test of time? This makes it 320 nails per square foot. Fasteners should be about 8 apart in the bottom 3/4 of the paper. While all tar paper comes in rolls, you do have some control of what size roll you will purchase. Have a helper ready to assist with this step, and take care to get the lines straight and clean. Depending on your local building authority, you can use staples for roofing felt or, in other words, as roofing felt underlayment. The average roll of 15-pound roofing felt covers about 400 ft2, or 4 squares, while the average roll of 30-pound roofing felt covers about 200 ft2, or 2 squares. If the guide was helpful, please share it with others. What Type of Nails Should be Used with Shingles? Perhaps they were underdriven in the first place. When the shingles are installed the felt is not going anywhere. Installing roof felt is a two-person job. Install the drip edge to the eaves (the lower edge of the roof) prior to rolling out the felt, or slide it under the felt underlay and over the fascia. A 2d nail is 1 inch long, for example, while a 16d nail is 3 1/2 inches long. They have a square-shaped head, instead of the more typical circular head you see on other nails. Chalk lines should be snapped 33 5/8 above the eave line. Table R803.2.3.1 specifies the maximum fastener spacing based on framing specific gravity, exposure category, and wind speed. 1 (19) 240 (1) 250 . Underlayment, also known as roofing felt or tar paper, is a layer of protection that roofers install between your roofing deck and the roofing shingles or tiles. Fit felt around vent pipes or other protrusions by cutting it with a utility knife and fastening around the bottom of the vent. The main drawbacks are cost and the need to use capped fasteners. Cut the extended eaves drip edge flashing between the roof leg and vertical leg at a 45 or 90 angle to the rake edge. This should be laid before the first felt is applied. However, due to manufacturing variances, the limitations of your monitor resolution and the variation in natural exterior lighting, actual colors may vary from the images you see. Overlap the end of a roll about 4 inches with the start of a new roll and fasten both pieces to the decking. The downside of roof nails is that they are bulkier and prone to multiple jams while working with them. (Must Read This). At intermediate supports, fasten panels 12 inches on center. Roofing Felt that exceeds the scuffed area by 6" (152 mm) Similarly, 19/32 OSB roof sheathing would be 8d common, box or casing nails at 6 on center at the panel edges and 12 on center in the field OR 2 16 gage staples at 4 on center at the panel edges and 8 on center in the field. Nails that didnt fully penetrate the sheathing may work their way up over time. This is because there is more surface area for the nail to grip. Grip the hammer tightly by the end of the handle and hold your thumb at the top of the shaft. Bitumen is a waterproof mixture of coal-tar pitch or asphalt and other viscous and sticky organic liquids. 4. For all Owens Corning shingles, roofing nails should penetrate into the wood deck by a . Type 316 Stainless Steel Nails - These are what you should be using on any new roof build involving an exterior wood product. 5. Heavyweight asphalt shingles commonly have a longer service life. The overhang to the next strip should be 3/8 inch. roofing company near me. However, you may need more (480 nails per square) if you live in an area with severe weather conditions to ensure that your roof can withstand the high winds and heavy rain or snow. As a result, most local building authorities have banned staples for roofing. Valley, ridges and hips should have a 6 inch overlap of paper. However, felt nails edge out staples in terms of cost, hold, durability, and quality. About Us | Contact Us | Privacy Policy | Home. 2 1 Overlap the corner by enough to trim the edge of the end shingle properly. Make sure to expose 5 in. They are also available in both hand-drive and pneumatic versions. It helps protect the sheathing and the shingles and commonly has parallel lines printed on it that make shingle placement easier. The paper should then be nailed in or stapled every three to four inches across. There are applications where felt is necessary and others where it is not. If you are on a budget or are looking for a fastening system that is easier to install, staples may be the right choice. Remember to follow appropriate safety practices when working from ladders or on roofs. Recently, things have changed as staples are no longer fancied or used as roofing felt underlayment. Wood Shingles (minimum 3/4 " sheathing) Wood Shingles Nail Type Minimum Length 18 Straight Split 3d Box 1-1/4 18 and 24 Handsplit and Resawn 4d Box 1-1/2 Disclaimer The above nail sizes are recommendations only. Galvanized nails are also available in a variety of lengths and sizes. Roofing nails are available in lengths ranging from one to two inches. (Follow Correct Way), What Does A Roof Certification Cover? In addition, the manufacturer's instructions should indicate which side of the roofing felt goes down if that matters for the specific product. However, in recent years, like in the last two decades, staples have been banned as an option for roofing and shingles because of fear of an incorrect installation. Arrow 1/4-Inch T50 Monel Rust Proof Staples, Building Code [IRC2018 Table R905.1.1(2)] requires two layers of underlayment for low-slope roof decks between 2/12 and 4/12, Local Codes may require it for slopes greater than 4/12, Many home and roof warranties require felt paper, NRCA (National Roofing Contractor Association) recommends bitumen, asphalt, tar, or synthetic felt for asphalt shingles, The NRCA recommends water-resistant underlayment for roof slopes greater than 3/12, Roofing felt helps to prevent pitch, uneven or sharp edges, and nails from damaging shingles, Some shingle warranties are void if felt isnt used, Necessary to meet Class A fire rating with some shingles, Provides additional protection to the roof decking against moisture penetration, When removing old shingles, fully remove and replace the old felt with new felt, Made of tar, asphalt, or bitumen-saturated organic or fiberglass substrate felt paper, Commonly used for slopes greater than 3/12, Water-resistant and breathable, not waterproof sheds moisture, doesnt trap it, 15-pound is lighter and thinner, and easier to damage; it has a permeability rating of 5, 30-pound is thicker and stiffer, and more resistant to damage; provides greater protection, Must overlap 19-inches or more on a low slope, 2/12 to 4/12, to form a double layer on the whole roof deck, On slopes greater than 4/12 the courses of felt should overlap at least 2-inches, Commonly fastens with staples or in high wind areas with plastic capped nails or plastic wind-strips, Compounds leach out over time and with sustained exposure to heat it becomes more absorbent, Manufactured from polyethylene or polypropylene, plus fiberglass in an asphalt-saturated base layer, Equivalent to felt but withstands higher temperatures, Lighter and stronger than felt, wrinkle-free, and may have a non-skid coating that is slip-resistant even when wet, Resistant to moisture, mildew and fungal growth, and UV damage, Can be left weather-exposed for 6-months or more, Overlap depends on the slope and manufacturers instructions, Fastens to deck with roofing nails or plastic cap nails staples arent recommended, May void warranties for some asphalt shingles, Polyester or polyethylene layer bonded to a weather-resistant non-skid upper layer, May have a moisture-resistant polymer film and/or a mineral coating melded to the upper layer, Typically self-adhering with a peel-off membrane protecting the adhesive side, Rubber-like material will self-seal around nails and staples, making it waterproof, Very flexible for irregular surfaces and different temperature extremes, May be designed to resist high-temperatures up to 250F, May be fiberglass-reinforced or polymer-modified for strength and elasticity, May have a selvedge edge or sticky strip along the upper edge to form a stronger watertight seal with the overlapping upper course, Typically more expensive than other underlay treatments. They are easy to install and are unique in their work and functions. This article will explore the pros and cons of each technique to help you make an informed decision for your next roofing project. Synthetic underlayment comes in 10 square rolls, while regular #15 felt comes in 4 square rolls. Dont confuse these cap nails with gasket roofing nails. Staples also have lower holding strength when compared to nails. The two main types are roofing felt 15 and 30. Pull the felt tight so that it lies flat and straight. Mold and mildew will result and you could wind up having to rip off the roof and install a new one. Nail metal drip-edge flashing, which bends over the roof and down the edge of the facing board, on all roof edges. If youre unsure how to install roofing felt or are just looking for some pointers, this guide is all you need. The hotdipped method results in a thicker layer of zinc that lasts longer, so they are preferred. So in terms of quantity, a roofing roll is about the size of one composite . Head diameter: 0.55" - 0.79". For asphalt roofing shingles, use galvanized nails. Roofing felt isnt designed to be left exposed to the elements. Starting at the eave, 36-inch-wide (914 mm) strips of underlayment felt shall be applied overlapping successive sheets 19 inches (483 mm) and fastened sufficiently in place. Replace any damaged decking and sweep the deck clean of sawdust and debris. It must be covered with waterproofing membrane, usually "roof felt," also called tar paper. One MSR roofing roll is usually about 36 feet long by 36 inches wide. According to BS 5534, the nails used to fix battens to rafters should usually have a diameter of at least 3.35mm. At the gable ends trim flush to the decking or leave 1/2 to 1 to wrap the edge when installing the drip edge. Roof felt is often called tar paper and is commonly used in similar ways, however, they are different. The seams between sheets use nails at 5cm spacing. Various nail shank types for different requirements. Instead of using lighter-weight 15-pound felt, use the heavier 30-pound felt as it will last longer too. Be sure you to use the correct nail length and place it properly. The next step is to cap the ridge. Share this Post: Back to Home. According to the International Building Codes 2018 Edition, fasteners for asphalt shingles must be a minimum of a 12-gauge shank.While it is common to find nails with a shank diameter of 13 inches, they cannot be smaller than 12 gauge and still comply with the IBC. They can also be unsightly if they rust or break over time. However, as roofing nails will usually be hidden by the shingles above them, steel nails dont detract from the look of the roof. I hope you found the guide informative and have a better understanding of how to install roofing underlayment. The size and complexity of the roof decking affect how long the task will take, but regardless of size, most felt installs are similar. Check the weather. Running a flat bottom shovel along the roof decking will help you find any stray nails that should be pulled. Roof felt is available in weights of 15 or 30-pounds per 100sqft. There are a couple of different ways to attach felt. If you were considering using screws for their extra security, consider ring shank nails instead. Many manufacturers offer 10-year guarantees for felt. That being said, you can expect a small, 5-pound box of smooth shank galvanized steel roofing nails to cost around $10. Multiply the width by the height for the square footage of each section, then add the . What Size Staples Required for 30lb Felt? 316 nails have elements of nickel, polymer and chromium . The variation in the lengths of the T50 staples entirely depends on the thickness of the felt and the density of the wood beneath it. The sooner it is protected by shingles, the better. Pressure-treated wood, Read More Pressure Treated Lumber For Roof Rafters (Lets See)Continue, As a homeowner, the various components of a roof are often vague, which might become a hindrance if you encounter roof problems, Read More Roof Eave Vs. Rake (In-Depth Comparison)Continue, Roof sheathing is one of the most common and significant parts of a building. The rolls are typically either 50 or 100 feet long. Or, if a roofs decking has warped or bent, it can pull nails out of place. Double that value and you have the full roof area. When preparing to shingle or reshingle a roof, laying roofing felt offers an extra barrier against moisture. The answer depends on the thickness of the plywood and the building code. . This is because each nail needs to be driven individually into the roof. Divide the resulting area value by the area one roll of 15 or 30-pound felt will cover, and round up as its sold in full rolls. Fasten drip edge on eaves with galvanized nails and a hammer, about 12 inches apart, before laying roof felt. The steps are pretty much the same whether its a big roof or a small one. 5 Energy Efficient Roofing Materials To Use. They require high skills and concentration when used, and any mistake or inaccurate placement can cause severe damage to the entire roof. -A 5/12 roof deck 4x 8 is 32sqft x 1.10 = 35.2sqft. When you get to an end shingle in a course, nail it in place so its edge overhangs the corner. One IKO test found that ring shank nails have 300% more strength than smooth shank nails.
