Take a look at the price per square foot of different materials to better estimate your potential roof replacement cost. The cost of installation is separate, and that can vary depending on whether you hire a roofing contractor or tackle a DIY roof project. The material type you pick will also impact roof installation prices. Unless you’re shingling a new roof, you’ll need to remove the existing shingles and underlayment. You may want to divide the roof into sections and clear a section at a time. Use a roof shovel to remove the shingles, nails and underlayment.















Follow the stagger pattern recommended by the manufacturer of your shingles, and use partial shingles to start subsequent rows. Once you get within 8 ft. of the ridge, measure down to your shingles at each end of the row. If one side is closer to the peak than the other, snap lines for all the remaining rows, making the reveal on one side progressively larger until you make up the difference. Start laying shingles along the eave and work your way toward the peak.















Make sure the roof deck — the wood base of the roof — is in good shape. Repair damage as needed and make sure there are no nails protruding from the deck that could damage the new materials. If you have any concerns pertaining to where and how you can use https://drssa.org.au, you can call us at our internet site. Check the deck requirements for your shingles to make sure your roof deck is compatible with the shingles. In winter, your attic should be as cold as the outside air. When heat from your home rises through the roof because the attic lacks sufficient insulation (R-60 in freezing climates), snow on the roof melts.















If you used stack flashing that has a rubber boot, seal the area where any rubber meets the pipe. Avoid silicone (it won’t hold up) and asphalt-based sealants . It’s clear like silicone, sticky as model glue and lasts for years. Start by running self-stick underlayment at least 6 inches up onto the walls. This provides an additional barrier if water does get past the flashing. Cover the front wall first, and then work your way up the side wall.















Then, install new flashing (metal flashing is often called \"drip edge\" along the bottom of the roof near your gutters) and starter shingles at the edges. These roof components act as a weather-proofing and protective barrier between your house and the elements, helping keep water and cold temperatures out. Line up the bottom of the first row of shingles with the starter row’s bottom edge, ensuring the seams are staggered. With that row complete, you’ll need to figure out the reveal (the portion of the shingle that isn’t covered by the one above it). Whatever the reveal is supposed to be, snap a horizontal line that distance from the top of the first row of shingles to guide you in installing the next row. The line helps keep the next row straight and is more accurate than lining up the bottoms of the shingles.















Here are your options, their estimated market share, and a brief overview of each. A new roof can be expensive, and knowing your budget or financing options can help you choose the right roofer and products. Get a few quotes before making a decision and ask questions to understand the costs. Start installing the new materials, moving from the bottom of the roof up through each subsequent row. Each row of material should cover the fasteners of the row below so there are no holes for rain to get through.















If you’re removing existing shingles, you’ll have a significant amount of material to dispose of. If the soffit vents are blocked, then there is no need for ridge vent. There’s a wide range of costs for replacement roofs. Factors that affect cost include the type and grade of material used, the complexity of the roof including the slope and number of valleys it has. In general, new and replacement roofs cost less than average in the South and more than average in the Northeast and on the West Coast. Kynar 500 and Hylar 5000 paint finish coatings backed by a 30-year warranty are the industry standard for residential-grade metal roofs.















Ice and WaterThat’s why valleys should be lined with and protected by a moisture barrier that covers each side of the valley by inches. Many roofing contractors in climates with freezing winter weather also like to install a layer of moisture barrier at the eaves where ice dams might form. GAF’s moisture barrier is called WeatherWatch and Owens Corning calls its product WeatherLock. The underlayment or roofing felt provides a moisture barrier for the rest of the roof. Keep underlayment tight, straight, and free from bubbles and wrinkles.















Install a starter course by cutting off the three tabs on a shingle, leaving only the top tar section. Use the chalk line to snap a straight line vertically every 6 inches. Pull the drip edge down about a half inch from that line to create a gap between the drip edge and the fascia board. The tabs should also overlap each other, from the roof’s center out to the edges. Permit specifics and costs are location-dependent, so check with your local municipal building office to see what you need.















Put tools or materials in a bag so both of your hands are free to hold the ladder as you climb. Better yet, have a helper and use a bucket and rope to transfer items up and down. All products and services featured are independently selected by our editors. However, when you buy something through our retail links, we may earn an affiliate commission. Products shown as available are normally stocked but inventory levels cannot be guaranteed. Cut the last ridge shingle to the length you need, but be sure that no part of the roof is exposed.