The most important thing to know about a flat roof says tom is that it s not flat to prevent water from pooling and eventually invading the home flat roofs are always built on a slight incline at least 1 8 inch per foot.
Flat roof fascia construction.
For additional stability you can also use steel joists that are built into one or both of the walls.
Go over the seam 2 3 times so the putty gets pushed into it.
Mix the filler with a putty knife on a flat sheet of cardboard or on a plate and scrape it onto your fascia board.
Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules.
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A waterproof exterior layer is essential and there are a number of options including bitumen based felt or asphalt epdm rubber and pvc based systems as well as cold applied liquid systems bitumen coverings.
Other flat roof construction details often refer to the types of flat roof coverings.
Then cover all of your nails with the putty as well.
Many slope in several directions like squashed hip roofs toward scupper holes that connect to downspouts.