Heavier materials such as slate and clay tiles need a larger.
Good slope for shed roof.
For slopes below 20 degrees systems such as epdm fibreglass metal roofing can be used.
A shed roof slopes in one direction only.
Match roof material and use appropriate slope match the roofing on the covered porch with the main roof.
For lots more information on which roof finish to use for which slope and indicative costs.
There are advantages and disadvantages to having a steep pitch versus a shallow or low pitch the most obvious of which is the roof s ability to shed or withstand heavy snow rain or wind.
Because these roofs shed snow ice and rain more easily they tend to last longer than low pitch roofs.
Easy rafters is designed to calculate shed roofs that are framed to a ledger board nailed against a vertical wall not freestanding shed roofs supported by walls at both ends.
The minimum pitch for.
It is possible to calculate a birdsmouth near the top of the rafter for a freestanding shed roof by checking the kneewall checkbox and entering a setback for the kneewall that positions the upper birdsmouth in the desired location.
This image shows a shed with a roof pitch of 30 degrees with a covering of cedar shingles.
A slope of 6 12 for example means that for every 12 inches 30 cm of length the angle of your roof rises 6 inches 15 cm.
Beyond that you re free to choose whatever slope best fits your plans for your shed.
Basically the steeper the pitch the better it can shed snow and rain.
A quarter inch slope is the lowest you would go with a metal roof experts recommend at least a half inch minimum to ensure a weatherproof interior for your shed.
These roofs require you to have special equipment to walk on them safely.
Visit the shed roofing page.
Steep pitched roofs are those with a pitch of greater than 7 12.
Sometimes the entire roof is a shed style roof.
Roof pitch for the shed roof pictured above the back has a 5 12 pitch.
A roof with a slope of 10 degrees 2 12 or less is generally considered a flat roof.
If you have to go with a roof pitch less than 3 12 then it would either have to be a metal roof or a roof covered with a rubber membrane to prevent water penetration.
Remember metal roofing is more expensive than shingles.
Acceptable flat roof coverings include tin roof sheets and pre fabricated plastic sheets.
Determine the minimum slope of the roof based on the roofing material.