How To Install Rafters On A Flat Roof

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.

How to install rafters on a flat roof.

At the peak the rafters are nailed to a ridge board and at. Attach a board uncut to the settle rafters on which you need to lay a vapor barrier material film construction. Joints are sealed with vapor barrier. The roof rafters provide integral structural support to the roof.

The 8 step process for diy installation. Once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing. The insulation thickness of 8 inches is laid as a flat carpet. This material must be laid across the rafters and overlap.

A flat roof truss is also known simply as a flat truss and is not completely flat but rather slightly sloped in order to allow water to run off of the roof. This video from bunnings warehouse will show you how to mark out where the rafters should go a. It helps direct water away from the. Stack insulation boards on the film top.

The flashing should overlap the edge of the roof by one inch to help direct. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters. Find out how to attach the rafters to your carport roof frame. Bend the flashing into a v shape to fit over the top roof ridge and the corners where the panels meet.

One important and perhaps not so obvious fact is that a flat roof is not actually flat. If you want to build a flat roof then you will need to build a flat roof truss these are designed to span the space between two load bearing walls and take the weight from the roof onto these walls.