Patio Deck Roof Pitch Requirement

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.

Patio deck roof pitch requirement.

The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. As such a patio falls under the irc recommendations on grading and drainage. This meant the patio cover could start at the edge of the house s roof at a height of eight feet and slope down to seven feet leaving a clearance of more than six and a half feet between the lowest part of the frame s headers and the ground at its outer edge. There are several variables to consider when determining the proper rafter size.

The new patio cover will be built using western red cedar 4x6 posts 4x6 beams and 2x6 rafters of course you can use pressure treated pine redwood or any other suitable framing material to build your patio. After that cut the rafters back to the wall line. The posts will be attached to the slab using. That means that the patio must slope away from your house at least 1 4 inch per foot for at least the first 10 feet from the house exterior.

All hardscape within 10 feet of a building must slope away from the building with a minimum slope of 2 percent. The roof will be constructed using multi core galvalume metal roofing. Using corrugated metal also allows me to reduce the degree of slope or roof pitch needed to a mere 10 percent or a 1 to 10 pitch. The back channel is connected to the rafter directly and reinforced.

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. The figures are based on quality materials. Use the divided measurement as the total amount of slope for the deck in inches. This means for every 12 horizontal units the roof must rise a minimum of two and one half vertical units.

With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 200 for slate roofs. By doing this method you will have a clean finish that is connected to the wall line. Building a patio cover a free standing example. Minimum roof slope roof pitch r905 3 2.

This sizing guide for roof rafters will help determine what you need for your small project. Clay and concrete roof tiles can only be installed on roof slopes of 2 1 2 12 or greater. The tables below give maximum spans for rafters and beams. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof.

Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter.