Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.
Flat roof eaves construction details.
That is their functional purpose.
The following illustrations and text explain the common design details using eaves and verges that can occur on refurbishment and new work.
If a sprocketted.
Details both in 2d and 3d to give a clear understanding.
Open eaves with roof rafters.
They also help to frame windows on upper stories.
Eaves form the overhang to distribute water clear of the walls.
I recently built a small outbuilding with a 6 in 12 pitch roof that offers a perfect example for showing the process i use to build eaves and rakes.
The modern flat roof.
A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal.
Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley.
Application methods adhered flat roofs ballasted flat roofs.
Flat roof construction for residential.
Start with the rafter tails the main component of any eaves detail is the rafter tail the part of the rafter that extends beyond the exterior wall.
Eaves with over fascia ventilation set top of fascia board at correct level and fit ventilator in accordance with manufacturers recommendations.
Open eaves with roof rafters right.
Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs.
Back to flat roof construction.
They re simple in form and function and are a good example of the modernist principle of clean lines.
This could mean flat roofs may not raise the same red flags they used to.
However there is also an architectural purpose to them.
Flat roofs are hard to replace.
As well as the small selection of roof detail drawings shown here many of the building notes have a related construction detail drawing with specific dimensions eg rafter sizes spans insulations types for purchase with the building specifications.
Flat roof details and information relating to insulating a flat roof.
Trusses streamline construction but it s important when using them to make sure the resulting eave works with the design of your building.
Additional construction details drawings.
Before roof trusses the exposed rafter tails were an extension of the roof framing.
An eave is the edge of the roof that overhangs the face of a wall and normally projects beyond the side of a building.
Modern architecture has traditionally been characterized by flat roofs flat roofs create long horizontal planes reminiscent of the broad horizon line seen often in nature.
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