Parapet Roof Intersection

Just as the roof parapet historically served to provide building occupants with a safe barrier against external attack the railing height roof to wall intersection for garden roof returns it to its primarily protective role.

Parapet roof intersection. Parapetitus they have a long history which of course is not always clear that allows me to embellish without threat of peer review reversal. 1 their major function today aside from confusing architects is to protect the edge of roof assemblies from wind uplift forces. A parapet roof is a flat roof with the walls of the building extending upwards past the roof by a few feet around the edges. Roof membrane must lap up wall to minimum of 12 above roof plane or per specifications whichever is greater.

Yes even flat roof to wall intersections are not being properly done. If there s no other way to address this maybe you could use tji blocking knock out a few of the pre punched web holes and call it vented. The most common mistake at this intersection is to allow the metal coping to but up to the wall without the application of termination metal. The flat roofing material must go up the wall a minimum of 12 or up the wall and over the top of the wall if the wall is less than 12 high.

A critical and often overlooked design detail is at the termination of a parapet coping at a wall. Wind uplift resistance parameters at last achieve meaningful values with a suitably elevated protective height parapet. A parapet roof is simply put when a building s outermost walls extend upwards past the roof around the edges most often by a few feet. 4 1 roof to wall junction 78 4 2 roof junction detail 81 4 3 tricky lean to junction 85 4 4 so t detail at gable verge 88 4 5 parapet or balustrade to wall junction 90.

Historically so many problems have occurred with parapets that we have a name for it. Insulate within parapet wall cavity to depth of roof insulation if present. I just use a fairly dense cant strip over top of that intersection between the roof and parapet and it seems to be working fine. While a roof parapet wall may seem like a small detail in the grand scheme of the entire building design it can actually change the dynamic of an entire roof both in terms of cosmetic detailing and safety.

It s also the junction where building aesthetics meets structural performance air and moisture management energy efficiency construction trade sequencing and operational maintenance. 76 build supplement flashings section 4 roof wall intersections roof wall intersections section 4.