Good chimney flashing includes sections of "step flashing" that run up the sides of the chimney, and "counterflashing
fits into grooves cut into the chimney and covers the step flashing.
"That made it more complicated to rough frame, and it made the flashing and counterflashing
of the roof systems pretty complex.
In exposed flashing conditions without counterflashing
, ensure the top termination is properly sealed and the termination bar is securely anchored to the substrate.
Problems frequently occur around base-flashing, metal base flashing and bituminous counterflashing
, metal counterflashing
, penetration flashing, drain flashing, gravel stop and metal edge strip, as well as problems with rooftop equipment, signs, braces, and supports.
These step flashings are then covered with shingles on the roof side, and siding or another piece of flashing, called counterflashing
, on the wall side.
"They forget about proper metal counterflashing
and crickets, or they simply just don't want to be bothered.
First remove the skylight's counterflashing
. On some units, you have to remove the whole glass frame (lead photo).
FIGURE 1 The Big Picture Disposal of old roof assembly $45,000 Labor $24,300 Insulation for new roof $29,100 New roof membrane material $15,300 Metal for new perimeter counterflashing
$ 3,600 Contractor overhead and mark-up $36,500 Replacement of damaged carpeting $25,000 Installation of new ceiling tiles $ 4,200