Put down your first sheet of plywood at the corner of one end of the roof.
How do yuo build on from a flat roof.
How to make a flat roof have a pitch general steps obviously you shouldn t do the work all by yourself.
Make sure it s lying horizontally across the exposed rafters and that the edges are flush with the edges of the end rafters.
The insulation thickness of 8 inches is laid as a flat carpet.
This can be done either with many pairs of hands or with the assistance of a crane.
To keep water from pooling at these inside corners tom rips 2x4s lengthwise on a 45 degree bevel with a table saw.
Drive a nail into each corner of the plywood to hold it in place temporarily.
The reason we included this section is to give you a good idea of how to build a sloped roof over a flat roof.
Brush into place 3.
Pour on the bags of gravel your looking to get just a single layer cover over the entire roof 2.
That would be.
Apply two coats of bright white elastomeric paint to your flat roof to increase its solar reflectivity.
Joints are sealed with vapor barrier.
Once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing.
Attach a board uncut to the settle rafters on which you need to lay a vapor barrier material film construction.
On two sides the roof abuts a parapet a short wall common around flat roofs as well as a wall for the third floor.
This material must be laid across the rafters and overlap.
Use ladders or scaffolding if you are building the roof onto a building that is still a frame.
That way you know the process.
The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure.
Stack insulation boards on the film top.
To complete this step the wall frames of the building must already be level plumb and square.
Draining and root stopping.
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Here the rubber roof will need to run up the walls and glue to the sheathing.
One important and perhaps not so obvious fact is that a flat roof is not actually flat.
Roll over the root membrane 4.
Hoist the trusses onto the roof.
Tests of heat reduction with elastomeric paint show a 60 to 75 percent improvement in how much it reflects sunlight and heat which translates to dramatic cost savings on energy used to cool your home.
The 8 step process for diy installation.