This has advantages and disadvantages and each of those should be weighed carefully.
Overlay roof framing.
Produced by apa the engineered wood association formerly the american plywood association in 1989.
Flat roofs with no overhang or gutter system create more opportunity for water to damage the exterior walls of the home too.
While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below.
The best case scenario for an overlay is sound decking.
Compare measuring and cutting studs to framing a house it s sort of like that.
Avoid roof complaints with proper framing sheathing and roofing techniques.
To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.
Position the square at the end of the rafter board with the tongue on your left and facing away from you.
Always ensure your work site is compliant with current osha regulations.
No previous or existing leaks.
In general overlaying a new roof takes less time less labor and thus less money.
A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework.
At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing.
Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.
A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load.
Add the length of the overhang beyond this mark and.
There is a huge difference.
And a roof with no sidewalls where flashing is needed to tie in the roofing material to the exterior walls of the home.
Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.
Turning a flat roof into a pitched or peaked roof and adding an overhang is a popular mobile home improvement project.
However if you overlay you cannot install an ice and water leak barrier as it has to adhere directly to the wood decking.
My simple little roof had had both gable and hip details that overlay vaulted sections.
The other books show how to lay out and measure rafters but they don t explain how to build your roof.
Framing a roof is the last step in framing new construction.
When you overlay a new roof you attach the new shingles or other roofing material to the existing roofing material.
Published on dec 6 2010 tophat framing systems owner tim lane presents part i of a series for specifiers contractors and owners describing metal roof overlay systems using tophat s patented.
It is a waterproofing layer made of regular felt stacked above the solid.
