Air leakage into and out of everything and everywhere.
Flash parapit wall to high roof wall.
Architects of ultra modern.
Wsrca suggests for walls 24 inches and taller that wall cladding be considered in lieu of membrane wall flashings per detail tp 8a.
Water may be entering the coping at the top of the parapet or entering the roof side of the parapet.
Fasten outside face with continuous concealed clip type fasteners or with two concealed discontinuous clips or cladding screws evenly spaced between seams.
Water from either of these locations may bypass flashing and enter the backup wall directly.
Ah but not in the way you think.
Prior to the installation of the parapet coping a metal flashing material shall be adhered to the structural wall.
And to make matters worse structurally we also tend to have some issues.
The profile of specific components their.
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.
Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings.
Fabrication procedure 1 metal cap flashing.
Cut to form a 25mm 1 wide flange for seam fabrication at cap flashing wall transitions.
No air control in either the roof assembly or the wall assembly.
Bigger step flashing is better.
Copper base flashing which extends at least 8 up the wall.
The counterflashing laps the base flashing a minimum of 3.
This detail shows a flashing condition at a vertical wall or parapet.
See sbs roof systems 12 6 cap flashings base flashings and reglets parallel standards are shown.
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.
Roof leg and a 7 in.
No vapor control layer and thermal bridging everywhere.
The roofing squares are locked into a 20 oz.
I recommend 12 in wide step flashings bent for a 5 in.
The metal flashing shall lap the parapet wall.
Mortar bridges below the through wall flashing may be allowing water to cross the cavity into the backup wall.
Many apartments and condominiums have flat sections of roof designed for air conditioning or other roof mounted equipment.
On walls greater than 36 inches high membrane wall flashing sheets are suggested to be strapped i e installed vertically.
The narrower step flashing just isn t wide enough to protect the intersection fully.
No membrane under the parapet flashing.
How to attach flashing to a parapet wall.
