- Chimney flashing consists of 2 types of flashing
- Chimney flashing comes in 2 styles and a few different types of material that the flashing is made from.
Chimney flashing keeps water from running down the chimney and penetrating into the house. Flashing leaks can cause expensive damage to the interior of the house, so it is important that the flashing is present, has been installed correctly, and is in good condition.
Usually there are 2 sets of flashing- the chimney flashing and the roof flashing that butts up against the chimney and is covered by the chimney flashing.
Roof flashing, inserted underneath roofing shingles. Butts up against the chimney.
If you see this at your chimney flashing area:
A roofing cement compound (tar) has been tooled over the metal flashing of the chimney. This was an attempt to solve a leak. This is a red flag, and the flashing should be replaced. This is usually something that a homeowner has done, and is a temporary fix at best.
Chimney flashing can be rusted and look pretty bad, yet still be quite functional. At this point, the rust can be sanded and the flashing painted with Krylon metal paint to preserve the metal. We consider this inexpensive preventative maintenance. If the flashing is heavily corroded, then you want to have it replaced asap.
Chimney flashing should be inspected on a regular basis. This photo shows the intersections of flashing properly caulked so that water cannot get in. Often we find flashing that has been improperly caulked or not caulked at all! Cheap caulking can wear away. Something as stupid as this can, and has, caused thousands of dollars of damage.