Minimum Pitch For Corrugated Plastic Roofing

These notes are intended to cover the use and installation of corrugated roof sheets such as pvc other plastics and bitumen fibre sheets.

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. In order to install your plastic roof correctly and prevent leaks you. Do not install poly sheet on flat roof or pergola. However you can only use this pitch with built up roofing or specialized synthetic roofing.

Installing translucent plastic corrugated roof panels. 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. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. 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.

Allow a 1 minimum pitch per foot for adequate drainage. Corrugated plastic roofing is a long lasting and low maintenance alternative to corrugated metal roofing. Installation of corrugated roof sheeting. 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.

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. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Just like other metal roofs the minimum pitch for a corrugated metal roof largely depends on the profile of the roof. Leaks at lower edge much more likely.

Pre notch rafters to compensate for slope. See what can happen to multiwall polycarbonate on roof pitch of less than 5 degrees. Courtesy the kemlite company. Base cap install system proper slope or condensation will not effectively drain out of the sheet.

Proper slope is polycarb.