Bigger step flashing is better.
Flash parapit wall to high roof wall.
Mortar bridges below the through wall flashing may be allowing water to cross the cavity into the backup wall.
Water may be entering the coping at the top of the parapet or entering the roof side of the parapet.
Water from either of these locations may bypass flashing and enter the backup wall directly.
Architects of ultra modern.
Accounting for roof penetrations when dealing with parapet walls the extra material needed to cover the vertical surface of the inside face of the parapet isn t the only added factor to take into consideration.
This detail may be used where wall heights are 24 48 inches above roof surface.
No membrane under the parapet flashing.
On the inside face of a parapet or wherever a masonry wall intersects a lower roof i have seen cases where the masonry flashing exits the wall one or more courses above the top of the retaining bar for the roof base flashing.
No vapor control layer and thermal bridging everywhere.
And to make matters worse structurally we also tend to have some issues.
No air control in either the roof assembly or the wall assembly.
Copper base flashing which extends at least 8 up the wall.
The profile of specific components their.
The roofing squares are locked into a 20 oz.
Roof leg and a 7 in.
Prior to the installation of the parapet coping a metal flashing material shall be adhered to the structural wall.
Fabrication procedure 1 metal cap flashing.
The installation of the coping to wall termination provides waterproofing protection and allows for differential movement between the two construction components.
Air leakage into and out of everything and everywhere.
On walls greater than 36 inches high membrane wall flashing sheets are suggested to be strapped i e installed vertically.
The counterflashing laps the base flashing a minimum of 3.
The narrower step flashing just isn t wide enough to protect the intersection fully.
Many apartments and condominiums have flat sections of roof designed for air conditioning or other roof mounted equipment.
Ah but not in the way you think.
How to attach flashing to a parapet wall.
Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings.
This detail shows a flashing condition at a vertical wall or parapet.
Cut to form a 25mm 1 wide flange for seam fabrication at cap flashing wall transitions.
With it parapet walls are indicated automatically on the roof sketch as flattened panels similar to an unfolded pizza box.
Wsrca suggests for walls 24 inches and taller that wall cladding be considered in lieu of membrane wall flashings per detail tp 8a.
I recommend 12 in wide step flashings bent for a 5 in.
