How To Start A Pitched Roof

1 2 the total span is equal to the horizontal span that one rafter will cover.

How to start a pitched roof.

Start by applying the drip edge to the eaves of your roof. The 2 by 4 should be about 2 feet longer than the tarp width. As aforementioned there is no standard pitch of a roof. As a rule of thumb you will first need to build the walls and floor before you can start to build the shed trusses.

Use a roofing nail 1 to tack the drip edge down one every 10 when placing two pieces of drip edge together overlap one end over the other by 1 and secure using two roofing nails one in the back and one in the front. After gathering all required materials and tools it s time to start the construction process for your pitched roof. If your eave is one straight length then pick an end and work to the other. So let s say a roof rises 6 inches for every 12 inches in depth towards the peak.

Express roof pitch as the ratio of the amount of the vertical rise of a roof or rise over the corresponding horizontal distance or run you write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run. By knowing the span of the roof and the pitch the pitch is the angle at which the rafters rise we can work out the length of the rafters. At this time any valleys on the roof should also be flashed with an ice and water membrane. You can build your own shed trusses by using a standard jig.

One thing you have to be careful is to install one row at a time so that it can be done in appropriate manner. The pitch of your roof is determined by the measurement of the vertical rise by the horizontal run. Completing all the rows till top of room will complete your pitched room. That is to say the roof pitch expressed as a ratio tells you how many inches the roof rises for every 12 inches of depth.

I show how i construct it showning in detail how to do the lead flashing. Next on the peak side attach the tarp to the 2 by 4 using cap nails. Then fold the excess tarp under a few rotations for a tight clean fit. This is part two of the porch build where i am doing the roof.

Screw the 2 by 4 directly into the roof to secure it. To be fully effective it should extend up the roof to a point at least 24 inside the vertical extension of the interior side of the wall.