Repeat until the roof is covered. 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. Rolls of felt are 36 wide x 144 long for 15# and 72 long for 30#. Staples can be used for tacking it down, but not recommended to hold. Many factors have influenced the shift from using felt nails in modern times. There should be no wrinkles or other spots that could catch moisture and cause problems. However, felt nails edge out staples in terms of cost, hold, durability, and quality. There are certain qualities that roofing felt underlayment must possess. The actual process of putting down the underlayment will be one of the fastest parts of the entire roofing process. Cap nail shank shall have a length sufficient to penetrate through the roof sheathing or not less than 3/4 inch into the roof sheathing. The International Residential Building Code (IRC) states two layers of felt for slopes between 2/12 and 4/12. . Tags removing the shingle and installing a new shingle, choosing between a nail gun and a roofing hammer. There are two methods of galvanizing nails: hotdipped and electrogalvanized. While it is common to find nails with a shank diameter of 13 inches, they cannot be smaller than 12 gauge (2.67mm) and still comply with the IBC. Call the team on 01752 692760 or use the . Although this is admittedly a matter of opinion, many people feel that nails provide a neater appearance than staples. 1 8d nail i like ring shank will help with a nail pop later 2 roof felt staples or plastic cap nails and rolled roofing aluminum 1 1/4 roof nails. This is because the staples are smaller and have a smaller head, which means they pierce the shingle less. Because they are less secure than nails, staples are more likely to lose over time. The Hillman Group 42041 Galvanized Roofing Nails, 1-Inch, 100-Pack. Make sure the nails are embedded securely into the felt and wood sheathing. The roof leg has one to three ridges to slow moisture movement, the smooth vertical leg sheds water, and the kick-out pushes it away from the facia. Specification Material: carbon steel, stainless steel, aluminum, copper. Grip the hammer tightly by the end of the handle and hold your thumb at the top of the shaft. For the lower . Its not wise to attempt to reuse them, as they may cause problems on the new roof. When nailing shingles, proper penetration into the roof deck is essential to ensure the nail and shingle remain secure. There are various roofing nails available in different materials. After unrolling the first 5 to 10 or so, tack the gable edge and centerline of the paper once its aligned with the chalk line. In this guide well discuss what roofing felt is, why it is necessary, and the different types of underlayment. Check the weather. The caps help prevent tearing and are helpful for keeping the felt in place if it is windy, or if there will be a delay laying the shingles. The length of each nail must be a minimum of 1 inches long, and for roof-overs, Atlas recommends a nail length of at least 2 inches. The most common size is 3/8 inch diameter with a 1-1/2 or 2-inch length. Nail every 8 to 12 and about 1-1/2 in from the outer face of the drip edge. They also go against most building code error codes and local building authority standards. By Maria Goudiss. What Type of Nails for Felt/Underlayment? If you use the same shingle and add the nail back in a different spot, youre leaving behind a hole where the nail once was. With higher coverage, youll lay down fewer shingles in a square and therefore use fewer nails. 3. The ridge cap used on this roof . Roof felt is often called tar paper and is commonly used in similar ways, however, they are different. Specifically, youll need roofing cap nails. They are waterproof or water-resistant and provide additional protection and a barrier against moisture penetration. While all tar paper comes in rolls, you do have some control of what size roll you will purchase. The two main types are roofing felt 15 and 30. When installing thicker shingles, you may need to use a longer nail in order to penetrate the OSB beneath fully. That being said, you can expect a small, 5-pound box of smooth shank galvanized steel roofing nails to cost around $10. Ask your dealer for the correct amount of nails for your size roof, in the length you specify. Drip edges on the eaves, any valley liners and all flashing should be installed before the tar paper is laid. Secure the shingles with the roofing nails. The reason they want you to use felt nails is to prevent blow offs if left exposed or high wind areas. This is because each nail needs to be driven individually into the roof. It is important to note that the nail and staple roofing felt have these outstanding qualities. Its general knowledge that nail roofing felt, and staples are almost the same and give desired results: securing or holding the roofing felt. If you need to install new roof decking or OSB, youll need to nail it to the roof truss. This is a fabric impregnated with asphalt to form a moisture barrier. Jewelry Box Felt Liner, A4 Size (8.3" x 11.8", Black) 4.6 out of 5 stars 2,348. Below we will explore an in-depth analysis of the two fastening systems to help you select the right one for your needs. Head: flat round. You may prefer to use copper roofing nails on a roof with other copper accents. You can adjust the firing depth of nails with an easy depth-setting wheel on the head of the tool, and clear jammed nails with the quick-release compartment aside the . Roof nails are available in 12-, 11- and 10-gauge. What Size Roofing Nail Should I Use. However, you may find they are more expensive. In most jurisdictions, building codes require using nails for roof shingles. For larger projects, youll need to use bigger nails so that they can better support the weight of the roofing felt. Whats The Difference Between Staple And Nails? You may find roofing nails identified by their penny length. Ridges, hips, and valleys should overlap at least 6-inches beyond the centerline, and there should be a similar overlap below vent pipes and utility stacks. According to BS 5534, the nails used to fix battens to rafters should usually have a diameter of at least 3.35mm. Felt nails have a more secure grip on the paper backing of the roll. Continue unrolling and tacking until you near the other gable edge. Consult your local building department for specific nailing applications. Instead of using lighter-weight 15-pound felt, use the heavier 30-pound felt as it will last longer too. 316 nails have elements of nickel, polymer and chromium . Your attic needs to breathe. Such factors include the nail spacing requirements of the total area of your roof and the slope or grade of your roof. 2 1 Overlap the corner by enough to trim the edge of the end shingle properly. Other Materials Cut it at the opposite gable edge, and roll out and staple the next course with the desired overlap. They cost less per square foot to install than nails, making them a good choice for those working with limited funds. 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. In areas where you can use extreme weather conditions, such as wind-driven rain, ring shank copper nails to seal or resist strong winds blowing over the roofs. and water shield should also be installed a minimum of 2 ft. past the inside bearing wall of the structure,so check the size of your overhang/soffit,and 6-8" of wall thickness,and calculate what you need by adding 2 ft. to the measurements,you`ll find in most cases ,1 . Where the felt isnt long enough to complete a course there should be a minimum of a 3-inch overlap. Before securing the end of a row, take time to walk the row, smoothing out any rough spots and matching up the snapped chalk lines. Consider other underlayment options as needed, such as rubber or tar products. It helps protect the sheathing and the shingles and commonly has parallel lines printed on it that make shingle placement easier. For example, when using Cambridge shingles, youll use roughly 240 nails, because of their Advantage size. Use galvanised clout nails to nail the first sheet of felt onto the roof. To calculate the appropriate roofing nail length, add the thickness of the shingles and underlayment to the thickness of the sheathing. This is helpful when you have a large roofing project. A greater overlap provides more protection but may cause problems with spacing and fastening upper courses relative to sheathing seams. This means they will last longer and not rust as easily as staples. Thus, you have to carefully plan the shingle and sheathing thickness and also the length of the nail. Roofing felt on high-traffic roofs, for example, must be able to stand up to a lot of wear and tear. Staples are typically made from aluminum or other metals that are not as durable. Measure the size of your roof in square feet. You may be tempted to reuse these to save on costs. It also helps the roof sheathing by preventing leaks and extending its lifespan. 1 Use a sharp knife to trim that shingle to within about 18 in. Therefore, you have to plan out your sheathing thickness, shingle thickness and nail length carefully. Paper can be fitted around vent pipes by cutting a slit and then putting it over the pipe. Fasteners should be long enough to penetrate at least 3/4" (19 mm) into wood decks or just . Also note that nails are sold by the pound, and if youre a professional roofer, it may benefit you to buy in bulk in order to reduce costs. What size nails for OSB sheathing? Nail shank diameter should be at least 11-12 gauge for roofs. The overhang to the next strip should be 3/8 inch. Start the roof felt at one bottom corner of the roof. Begin the next course from the edge just cut, moving up to the next chalk line. Mark every 34 or 33 and snap a line across the deck for 2 or 3 overlaps on slopes greater than 4/12. In addition, roof staples are affordable, easy to work with, and can be used for diverse building projects. This article will explore the pros and cons of each technique to help you make an informed decision for your next roofing project. What Size For Roofing Felt? For roof slopes greater than 4/12, multiply the area by 1.10 to account for the 2 overlap and potential waste. A typical roll of 15-pound felt is 36 wide and 144 long and covers 432sqft. Divided by 432 for 15-pound felt or 216 for 30-pound felt and round up for full rolls for this roof theyll be lots of leftover from one roll for the next project. If there are hips, valleys, or dormers, increase the total by 10 to 25%. Overlay a second layer of felt 2 to 3 inches and fasten it through the overlay so it secures the top of the felt underneath. In addition, the chances are that You can install staples incorrectly or inaccurately. Galvanized nails are also available in a variety of lengths and sizes. That is why they are used for additional water tightness in extensive wind areas to reduce the chances of wearing and tearing. HousingHow Roofing Roofing Felt Nails Or Staples? The nails should be spaced 6 to 8 inches apart, so the total number of nails you will use will depend on the size of the roof. A nail gun is the best way to install roofing felt nails. Staples are faster but lack the holding power of nails. -A 5/12 roof deck 4x 8 is 32sqft x 1.10 = 35.2sqft. Determine the bundles of shingles needed to cover the roof. The lower the gauge number, the thicker the nail. This is because they are faster and easier to install than nails. Both felt nails and staples require minimal maintenance. Aside from the lightweight of the roof staples, it is highly inexpensive and cost-effective, which is one of the reasons why most individuals or companies prefer to use them. Due to these, Read More Plywood Under Deck Boards! Well walk you through the types, sizes and materials you may choose from when picking a roofing nail. They are widely used and have been recognized as effective methods of holding roofing felt or underlayments and can be used for several small-scale buildings or larger building projects. Where a roll ends and a new one is begun, the two rolls should be overlapped by four inches. Strips should always lay flat. In high-wind areas, more fasteners may be required. Of course, if you find yourself overwhelmed by the planning, preparation, or execution, you can reach out to professionals in your area. Chalk lines should be snapped 33 5/8 above the eave line. You can get away with using regular nails if working on a smaller project, such as repairing a leaky roof. Nails can pop above the roof surface for a number of reasons. Once the course of felt is tacked in place aligned to the chalk line, trimmed, and cut to length, go back and add more staples or nails to secure it in place approximately every 4 on gable edges and 8 apart elsewhere. Staples are also not as durable as nails and are more likely to come loose in high winds. Never mount the felt paper on wet sheathing. It is required to block any rain that gets under or between shingles from penetrating into the wood decking. Conclusion 15-pound roofing felt costs around $20 for just over 420 square feet. Read More What Does A Roof Certification Cover? Fasten panels with a minimum of 8d Common (0.131-inch by 2-1/2-inch) nails spaced a maximum of 6 inches on center at supported panel ends and edges. . Also, you can use an aluminum or copper nail, depending on your location. For best performance, you should use ring roofing nails that are made of hotdipped galvanized steel. So for the 24 square roof example, you would need 2.4 rolls of synthetic underlayment, or 6 rolls of regular #15 felt. Most building codes regulate that at least a 12 gauge shank with a diameter of 3/8 head be used. Roofers tend to use the roofing nails they already have on hand to install flashing. Even if it is imperceptible to you, water will find it. Some suggest you fill this hole with roofing cement, but this repair option must be done carefully to maintain the roofs water-shedding performance. When preparing to shingle or reshingle a roof, laying roofing felt offers an extra barrier against moisture. Nevertheless, it is essential always to consult the products to see if the producers have a laid-down procedure of which of the two roofing options are best for their products and how you should use them. However, the size differs depending on the application and the local building codes. In addition to these, nail felts are made from steel and used only to secure the roofing felt underlayment. The use of nails for roofing in an area may differ from another, but they are primarily similar; therefore, it is difficult to go against building codes when using roofing nails. Staples also provide great finishing outlooks on your roofing or other building projects. By using this website you accept our use of cookies and the. Corrosion resistant to ensure they last over time, and for use where strong joints are required. Highly visible alignment lines. Start at the lower gable edge of the roof deck and work upward.
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