The assembly is straight forward but what complicates matters is that the roof needs to be vented.
Flat roof parapet height.
Courtesy of max baker and the national research council of canada.
The plain parapet wall is provided with the concrete coping at the top side and corbel below it.
Typical methods include banding pitch pockets and cover flashings.
Banding is typically used to seal soil vent pipes on single ply roofs such as fdt rhepanol pib and involves wrapping an unreinforced membrane around the pipe to a minimum height of 150mm an approved sealant is then applied to the top of the membrane.
We offer railings that attach to the top of the parapet.
The parapet itself is standard wood framing with an applied siding in this case t g 1 4 cedar.
Single unit monolithic roofing applied to flat roofs may seem safer to some roof workers but the work is still at height and subject to many similar hazards and safety requirements as sloped roof work.
The height of the parapet shall be not less than 30 inches 762 mm above the point where the roof surface and the wall intersect.
Where the roof slopes toward a parapet at a slope greater than two units vertical in 12 units horizontal 16 7 percent slope the parapet shall extend to the same height as any portion of the roof within a fire.
The parapet height may have to have a minimum height if it is part of a fire rated assembly between units depending upon the use and classification of the structure.
What typical detailing methods are used to seal flat roof penetrations.
The height of the building is calculated to the highest roof element not the parapet or mechanical protrusions vents chase etc.
Plain parapet walls are provided for only ensuring the safety of the occupants.
If penetrating the outside of the wall is not an option a freestanding non penetrating railing can be used to keep people back to from the roof edge.
First of all commercial and multi unit residential buildings are a lot bigger than single family homes in most cases.
At the highest point of the sloped roof the parapet is about 10 tall at the lowest point the parapet is about 14 tall.
Like any roof with.
Also there may be several roof penetrations and other obstacles that should be factored into the measurement.
Install a non penetrating full height railing.
If you didn t get it right you concentrated the stresses at roof edges and you could suck in a parapet or tear or rip a membrane at the parapet photographs 3 and 4.
Roof membrane temperatures ottawa canada summer day.
If you can penetrate your roof parapet there are several roof parapet railing solutions.
The plain parapet walls are basically a vertical extension of the wall which is constructed at the end of the roof.
