Gable Roof Formula

12 6 72 convert the inches back to feet.

Gable roof formula.

Note that in the last 3 4 years costs of roof shingles and many accessories have gone down by an average of 18 20 currently the us national average for benchmark architectural shingles is around 74 51 square or 25 per bundle. That formula is the pythagorean theorem using the following examples. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

Split the gable into two triangles and form a rectangle 6 12 72 the total area for your gable 72 square feet. Multiply this 12 by the roof pitch rise. The edge uses plan view to calculate measurements and to apply a specific formula to its measurements. It can be looked upon as the part of the wall that seals the end of the roof structure.

Pitch measurement method 3. To calculate the pitch of a hip valley of a roof the edge has to calculations based on specific points of reference every time. 72 12 6 at the highest point the gable is 6 high. 144 12 12.

Use of manufactured roof trusses can dramatically cut labor costs when framing a gable roof compared to building rafters. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. When a gable consists of a sloping roof rather than a flat one the gable forms a triangle.

Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. A gable is the part of the side wall of a building above a line between the eaves. Now measure from the 12 inch mark of the level up to the bottom edge of the gable trim. Includes result for hip valley factor slope factor and the roof slope in degrees.

A gable end is the gable and the wall beneath it. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Trusses can be constructed with smaller sized lumber than rafters and often their cost is not significantly higher than normal rafters. On a ladder at the gable end of your house place the level against the gable trim flat against the side of the house.

This distance is the roof s rise. Calculating the gable s square footage.