Starting at the peak of your gable roof measure down 36 along each side of your gable and make a mark.
Measuring gable roof.
If you cannot perfectly match your actual gable that s ok for all of our designs except 4208 and 4210.
From a ladder or other accessible area giving safe access to the sloping gable end trim or roof edges 1.
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.
The length l times the height h of a triangle is twice its area a2.
Stretch your tape measure along the walls from end to end.
Measure your roof accurately use a measuring tape preferably 50 or 100 feet long and get exact ground dimensions of your house.
Use a pitch.
Calculating gable height knowing wall length and roof pitch.
It does have to contain all the straight lines of your roof and an accurate measurement of those lines.
The pitch is the steepness of the roof.
To find the pitch of your roof you ll first.
Measure out horizontally 12 one foot from the gable end sloping trim to a point along horizontal siding or use your level to make a mark that is level horizontally measured out 12 from the sloped gable trim or roof edge.
Wall length 24 roof pitch 6 12 6 of rise for every 12 of run take half the length of the gable wall and convert it to inches.
Measuring your roof from the ground 1.
Enter the width of the building.
Inches enter the overhang of the gable.
Measure both the width gable side and the length eave gutter side.
Gable wall side feet inches enter the overhang of the eaves.
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.
Calculate the pitch of the roof.
Inches enter the pitch of the roof.
Find the length and width of the building s exterior walls.
Place the end hook of the tape on the corner and run it all the way to the opposite corner of the house.
L 30 feet h 12 feet 30 12 2 180 square feet.
Remember it doesn t have to be to scale or look pretty.
Method 2 horizontal measurement 1.
So if you divide your answer of a product of length times height by two you will get the area of a triangle.
Roughly draw out your roof on a piece of paper.
Simply take your ground dimensions multiply length by width and apply the roof pitch multiplier.
If you have a simple gable type roof like a colonial or a ranch home calculating roof size will be as easy as two plus two.