hip roof framing - hip to common to ridge join diagram: ply sheathing angle and cut set-back - both sheet orientations sheathing hip cut calculator hip roof ply cut angle diagram 1138.93 ft² = 35.6 sheets waste = 40 sheets
to accurately calculate the area of your roof, you must first determine its slope, or pitch. a roof's pitch is determined by how much it rises vertically for every foot it runs horizontally. thus, a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
aluminum or steel material that is used to cover roof joints and prevent water from getting in. ice/water shield. an ice shield is only necessary if you live in an area that is prone to ice and snow in the winter. boots. these are required to go around any pipes sticking through the roof. delivery charge for your materials if there is one .
to calculate the area of your porch roof to calculate the area of your roof, first determine its rise and run slope or pitch . we found some fairly easy ways to do this you'll need a tape measure and a level . before you begin, mark the bottom of your level 12' from one end. option 1: the no ladder option. put the level against a rafter in your attic with the 12-inch mark at the bottom of one of the rafters.
roof rafter calculator will estimate the length, board size, quantity, cost per board and total cost of lumber the estimates are based on your house foot print length and width and roof slope. prices are based on quotes from multiple lumber yards and building material suppliers.
step 4. calculate framing and decking for a roof. divide the entire length of the roof by 2 feet to find out how many rafters you'll need to frame the roof. for the decking, multiply the length by the width of the roof, convert to inches and divide by 32, the square feet of one sheet of plywood. this will equal the number of plywood sheets you'll need.
building a porch roof. take the measurements of the length and width of the porch. estimate the columns that would be formed on the floor by keeping in mind the placement of stairs. the columns are generally 6 to 10 feet apart. chalk out all the measurements as then it will be easier to carry out the digging process.
roof pitch. while it is possible to estimate the amount of necessary materials using only the total roof area measurement, as can be seen from the table, depending how large the pitch of the roof, the actual area of the roof can differ by up to 2.236 from the measured total area at a pitch of 24/12.
planning approval building approval is included. planning is required in some situations, ie. building closer than 1m to a fence line posts extended to boundary roofing can only go as close as 500mm the your neighbours fence but the post can be extended to the fence box gutter a double size gutter that takes water from the house and the patio. patio raised to accommodate a camper van or
rise and run is critical to building a porch roof, cutting rafters, and even figuring out the amount of shingles to purchase. rise and run affects drainage, style, and installation, repair, and even what roofing materials you can use.
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of course, wood is the first choice for many. oriented strand board and plywood have a long and successful history as roof decking. they will require shingling, but this will allow you to match the porch roof to the rest of your house. plexiglass and polycarbonate are two other materials used on porch roofs.
keep in mind that the average size of a roof is 1,700 square feet, so your total will likely be 10% higher or lower than this figure. check that your footage measurements are within this range so you can start off on the right foot. next, you will need to use a roofing materials calculator.
calculate the size of your roof and estimate how many bundles of asphalt shingles, rolls of felt, and squares of roofing material are needed for a new roof. add the price per square of materials to get an estimated material cost.