Flashing Between Chimney And Siding

08 09 2015 12 51 pm 7.

Flashing between chimney and siding. Where the step flashing terminates along a sidewall is a common trouble spot for moisture problems. Otherwise dripping water will leave its mark along the siding. 6 install building paper. Flashing vinyl siding next to vertical side of chimney.

Second step flashing needs to extend 8 to 14 inches above the shingles according to the national roofing contractors association nrca. The water then runs off the flashing because it can t go up the flashing as it extends up behind the siding. With the flashing in place let s see what happens. Attach the flashing to the face of the wall with 6 penny galvanized nails and a hammer.

However my question is more about the water proofing of the joint between the chimney and the wall. The nails should be inch from the outer edge of the flashing and 16 inches apart. Also avoid caulking tongue and groove siding boards together. Siding nails should not be caulked another item that needs room to play is siding boards themselves.

Run the l shaped flashing up under the bottom row of siding so that it tucks under the final bottom row and on top of the wall and on top of the last row of bricks before you cap it with the cap. The nails holding up the siding should not be caulked. Metal flashing or any metal to wood joint should not be caulked another water exit pathway that should never be sealed. Wall flashing where siding meets a chimney clean out the gap use backer cord for large gaps and seal with good quality butyl caulk in clear colour.

First step flashing must be installed before the siding so that the siding can cover the top of the flashing. The best solution is a preformed or custom bent kick out flashing to divert the water away from the siding. 05 01 2011 05 17 am 5.