This can be accomplished by running self adhering flashing over the fin and up onto the window frame above.
Flashing block frame window.
An unsealed bottom fin will create an escape route for any water that finds its way past the building envelope somewhere above the window.
Window installation instructions rev.
A window or door is installed on a stud wall with sheathing after the building wrap is in place.
It is then secured to the wall and integrated with the building wrap using flashing tape.
Flashed rough opening and then glazed it with block.
Pan flashing should extend up the rough jamb at least 6 in.
Sill pan flashing is recommended for block frame window installations.
Do not apply sealant or flashing to the bottom nailing fin.
For nail on and block frames doc no.
It is recommended for peace of mind against water intrusion and mold.
Fasten the top edge of the sill flashing paper to the framing but do not fasten the lower edge so the weather resistant building paper applied later may be slipped up and underneath the window flashing.
White pvc sloped sill pan for door and window installation and flashing complete pack can be cut to fit the opening if needed.
Sill pan flashing for block frame in surface barrier wall.
The suresill 4 9 16 in.
With a utility knife cut the flashing from the corner down the flashing that will expose the previously installed corner guard.
If the top of the window is near an eave but the bottom is exposed to the elements strip off the siding and focus on flashing the bottom half of the window but ignore the top.
A sill pan is used to ensure that incidental water that penetrates the building envelope will be collected and allowed to drain.
Center the flashing left to right.
When air sealing around the window door frame from the interior do.
And onto the wall surface at least 2 in.
White the suresill 4 9 16 in.
I left a space of 1 75 at the top to allow easy installation of the top course and when it was set i toe screwed a piece of redwood 2x4 in to.
I cut a length of teq flash flashing using the formulas at least 12 wider than the rough opening.
If the window s deep in an entryway and has zero exposure you can skip the weatherproofing and just caulk around it.