Minimum Pitch For Corrugated Plastic Roofing

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Minimum pitch for corrugated plastic roofing.

In order to install your plastic roof correctly and prevent leaks you. Condensation under polycarbonate rafters attached to fascia with painted timber battens fall away from house roof roofing starts above existing spouting with 100mm over hang and falls away from house at minimum fall to the new spouting i am a builder an have never had a problem with condensation under polycarbonate tas. These notes are intended to cover the use and installation of corrugated roof sheets such as pvc other plastics and bitumen fibre sheets. Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof.

However you can only use this pitch with built up roofing or specialized synthetic roofing. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. The most common evil performed by so called roofers is the use of corrugated roofing all the manufacturers nominate a 5 degree minimum pitch for this profile whenever and wherever a metal roof is called for. A cat ladder or roof board should always be used when working on a roof for safety of the person and to avoid damage to the roofing material.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. 4 attach rafters to header and crossbeam with 1 screws and nails. Leaks at lower edge much more likely. Proper slope is polycarb.

Courtesy the kemlite company. Corrugated plastic roofing is a long lasting and low maintenance alternative to corrugated metal roofing. Pre notch rafters to compensate for slope. See what can happen to multiwall polycarbonate on roof pitch of less than 5 degrees.

Plastic is much lighter and easier to work with making it popular with homeowners looking to save money that could be spent hiring professional installation teams. In most occasions a pitch of three in twelve is preferred but this should also take into consideration the manufacturer s recommendations as well the unique condition of the. Installing translucent plastic corrugated roof panels. Do not install poly sheet on flat roof or pergola.

Allow a 1 minimum pitch per foot for adequate drainage.