How To Layout A Roof

Try to keep all roof surface pitches the same.

How to layout a roof.

Pick a corner to start placing the plywood sheathing. Try to keep all roof surface pitches the same. A roof is an integral part of a building and people try to personalise the roof designs to achieve optimum architectural splendour. Poorly constructed roofs endanger the people living in a building so you need to make the roof compatible to the rest of the building in a well engineered style.

Snap horizontal chalklines to help you keep the courses straight. Add the length of the overhang beyond this mark and. Continuing on from part 3. Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge. Anything else often looks funny. First snap a line for the top of the. Sheathing goes onto a roof prior to the final roofing material e g shingles.

The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. How to do it prep work space. Flip the square over and place the tongue along the line made in illustration b. Measure up a distance equal to 25 of the width of the rafter as shown in illustration c and put a mark.

Continue to chalk additional guidelines based on the width of the shingle through at least four courses rows across the roof. A cross gable roof is a design that consists of two or more gable roof ridges that intersect at an angle most commonly perpendicular to one another. Draw a line down the edge of the tongue as shown in illustration b of the roof layout. Let s consider a basic gable wood roof framing design.

Here we have a wood framed gable roof. This type of roof is often seen in buildings with a more complex layout for example homes with an attached garage. Use nails to tack the sheet in place on the rafters to hold it in place while you work. Nail the plywood sheathing to the rafters.

Marking the birdsmouth and the ridge board setback. Starting at the bottom of the roof map out a guideline with chalk. Install a starter strip. The colour and material of the roof complement the structural integrity of a building.

If possible have the shingles delivered via a boom directly onto the roof. Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.