Even if it is imperceptible to you, water will find it. 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. Lay it over metal flashing edges around vents and pipes. Divide by 432 or 216 depending on the weight of felt for 4.89 rolls of #15 or 9.78 rolls of #30 felt. IKO assumes no responsibility for errors that may appear on this website. Account for waste. By using this website you accept our use of cookies and the. On shallow sloped roof, we would suggest the overlap is increased to 75mm. That is why they are used for additional water tightness in extensive wind areas to reduce the chances of wearing and tearing. -A 3/12 roof measuring 20x48 per half is 960 for a total area of 1920sqft. Nails and staples have several significant differences. The kind of nails youll use for your roofing felt will depend on the project youre working on. When protected by well-maintained shingles, the underlay will last between 20 and 30-years, or as long as the asphalt shingles. Staples are also not as durable as nails and are more likely to come loose in high winds. The average 3-tab shingle needs four nails per shingle. Nails will also be required for any roofing project. However, felt nails edge out staples in terms of cost, hold, durability, and quality. Staples are faster and easier to use as an underlayment. Type 316 Stainless Steel Nails - These are what you should be using on any new roof build involving an exterior wood product. Although this is admittedly a matter of opinion, many people feel that nails provide a neater appearance than staples. When installing thicker shingles, you may need to use a longer nail in order to penetrate the OSB beneath fully. Many manufacturers offer 10-year guarantees for felt. 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. Aluminum is a weaker metal than steel and copper. Measure the length from edge to edge and the eave to ridge, and multiply the values for the area of half the roof. Nail down squarely (90 degrees) into the deck to secure caps flush to the underlayment. If you have any further unanswered questions or want to know more about the best roofing nails for your project, don't hesitate to get in touch. They cost less per square foot to install than nails, making them a good choice for those working with limited funds. 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. Ensure theyre long enough to penetrate through the felt and the roof decking. Rolled roofing (or roll roofing)also known as MSRcomes in rolls of 100 square feet. The puncture must be complete so that the whole diamond tip is past the wood. 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. Check the requirements for the roofing material that will go over the felt. felt application we use plastic cap nails with the Bostitch cap nailer. If you are on a budget or are looking for a fastening system that is easier to install, staples may be the right choice. Thus, you have to carefully plan the shingle and sheathing thickness and also the length of the nail. Finished Product We'd love to see how your project to replace roofing felt turned out! It sheds precipitation while awaiting shingles, protects the shingles from resins and glues leaching from the decking, and acts as a second line of defense against moisture. This is because the nails are made of a stronger material that can withstand more wear and tear. High wind areas and other types of shingles may need more. Put fasteners at least every 8 inches; some suppliers recommend staples about every 4 inches. To calculate the appropriate roofing nail length, add the thickness of the shingles and underlayment to the thickness of the sheathing. Chalk lines should be snapped 33 5/8 above the eave line. This will help keep any moisture from getting under the felt. Limited time deal. Although roofing staples are designed to be strong, they are not as strong as nails. Also, when installing ridge and hip shingles, youll need nails that are about a half an inch longer, as they need to penetrate more shingle layers. Nail guns are pretty easy to use as there is no risk of an incorrect installation even if the gun is not held in the correct position. What Size Staples Required for 30lb Felt? Determine the bundles of shingles needed to cover the roof. It also helps the roof sheathing by preventing leaks and extending its lifespan. Installing the roofing felt does take care, but can go very quickly. 2004-2023 IKO Industries Ltd., IKO Industries, Inc., and their affiliated and related entities. Do not simply hammer the nail down, renail it in the same spot, or use the same shingle. Roofing felt is made of natural or synthetic materials such as wood cellulose, recycled cloth, fiberglass, or polyester. In normal wind zones the nails should be driven at 6.0 O.C. 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. Roofing Felt that exceeds the scuffed area by 6" (152 mm) The standard size for roofing felt paper is categorized into four. Where a roll ends and a new one is begun, the two rolls should be overlapped by four inches. Cap nails or nails with a 3/8-inch head are also a good choice for roofing felt, as theyre less likely to come loose over time. These have large plastic caps for heads, which help prevent water intrusion. This is because they are faster and easier to install than nails. Do the other side of the roof the same way, also with an overlap at the peak. We have the following; For galvanized roofing shingles, they make use of a 16 gauge shank. According to BS 5534, the nails used to fix battens to rafters should usually have a diameter of at least 3.35mm. Many metal roofing dealers specify minimum of 7/16" sheathing. We have the following; 3/8 x "3/8 7/16 x 1 - 1/2 1/2 x 5/16 1 x 5/8 For galvanized roofing shingles, they make use of a 16 gauge shank. This way, you can avoid making multiple trips to the store for more supplies. 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. Starting at the eave, a 19-inch (483 mm) strip of underlayment shall be applied parallel with the eave and fastened sufficiently in place. The quality of the material used is also an important consideration. Due to these, Read More Plywood Under Deck Boards! For more tips on roof installation and tools, read our article about choosing between a nail gun and a roofing hammer. 316 nails have elements of nickel, polymer and chromium . The International Building Code requires that roofing nails have a minimum 12-gauge shank and a 3/8-inch diameter head. Whats The Difference Between Staple And Nails? For nail spacing requirements, an online calculator will give you a breakdown of the minimum nails per square footage that is required for your roof. Tags Roof Felt Underlayment to Protect Your Home From the Elements They are also less likely to leave behind unsightly marks on your top. Start the roof felt at one bottom corner of the roof. The RSRS designation indicates the fastener is a ring shank roof sheathing nail. We'd recommend nailing from the centre of the edge of the sheet and working outwards. Its not wise to attempt to reuse them, as they may cause problems on the new roof. Repeat until the roof is covered. Check the weather. Staples also provide great finishing outlooks on your roofing or other building projects. Simply put, smooth shank nails have a smooth shank. It is quicker to install and can withstand winds and extended exposure better than felt. Is it necessary to use adhesive? 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.