Chimney Flashing Repair and Re-Flashing
When your chimney has developed a leak you will usually notice water
staining above the chimney when it rains. It will likely be on the ceiling and
perhaps running down the wall as well. This indicates that the chimney flashing
is allowing water in and needs to be re-flashed.
Chimney flashing is a construction detail used to seal and protect the
joints between a building’s roof and chimney from water penetration. The joints
created by the intersection of the roof and chimney are among the most
vulnerable areas of roofing systems. They constantly expand and contract in
response to changes in humidity, temperature and age. The greater the number of
such projections, the greater the potential for serious leaks. Flashing is used
at these intersections to keep rainwater from leaking into the building. It
makes joints at these junctions watertight, while at the same time allowing the
natural expansion and contraction of materials to continue.
Chimney flashing has three main components:
The back (upper) side of the chimney is protected by flashing aswell: