Flash Parapit Wall To High Roof Wall

With it parapet walls are indicated automatically on the roof sketch as flattened panels similar to an unfolded pizza box.

Flash parapit wall to high roof wall.

See sbs roof systems 12 6 cap flashings base flashings and reglets parallel standards are shown. Ah but not in the way you think. 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.

How to attach flashing to a parapet wall. The counterflashing laps the base flashing a minimum of 3. Water from either of these locations may bypass flashing and enter the backup wall directly. Cut to form a 25mm 1 wide flange for seam fabrication at cap flashing wall transitions.

Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings. 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. On walls greater than 36 inches high membrane wall flashing sheets are suggested to be strapped i e installed vertically.

The metal flashing shall lap the parapet wall. Wsrca suggests for walls 24 inches and taller that wall cladding be considered in lieu of membrane wall flashings per detail tp 8a. Fabrication procedure 1 metal cap flashing. Many apartments and condominiums have flat sections of roof designed for air conditioning or other roof mounted equipment.

I recommend 12 in wide step flashings bent for a 5 in. 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. The profile of specific components their. This detail may be used where wall heights are 24 48 inches above roof surface.

Architects of ultra modern. 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. The narrower step flashing just isn t wide enough to protect the intersection fully.

The roofing squares are locked into a 20 oz. This detail shows a flashing condition at a vertical wall or parapet. Mortar bridges below the through wall flashing may be allowing water to cross the cavity into the backup wall. Prior to the installation of the parapet coping a metal flashing material shall be adhered to the structural wall.

Air leakage into and out of everything and everywhere. Copper base flashing which extends at least 8 up the wall. No vapor control layer and thermal bridging everywhere.