From Newsgroup: alt.home.repair
Quick share from a recent job in Santa Maria, CA. 1960s ranch, S-profile clay tile (~5:12). Homeowner saw staining at the living-room ceiling after west-wind rain. The chimney had painted steel apron, no real reglet (just mortar), and clogged weep paths.
*What we found*
Water tracking under tiles at the downhill side of the chimney
Hairline cracks in the stucco where rCLsurfacerCY flashing was buried
Wet sheathing around the cricket; underlayment brittle from UV
*What we did (2 days, start to finish*)
Cut a clean 3/4" reglet in stucco and installed a 16-oz copper counterflashing (soldered corners)
New copper pan + 2:1 cricket, hemmed edges; HT peel-and-stick underlayment under the assembly
Re-set tiles battenless at the pan, opened weep paths, and sealed reglet with a polyurethane rated for stucco
Photo doc + hose test (10 minutes, west-side), then first storm verifiedrCodry ceiling
*Result & takeaways*
Passed a 0.9" rain week with west windrCono moisture on thermal camera
Typical cost in our area for this scope lands around $1.8krCo$3.2k, depending on access/chimney width
If your chimney flashing is just mortar-smeared metal with no reglet, plan for a proper cut-in counter + pan/cricket and real weeps. ItrCOs the difference between a patch and a fix.
https://www.homeownershub.com/img/3cv7
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For full context, visit
https://www.homeownershub.com/maintenance/santa-maria-case-study-stucco-chimney-leak-fixed-on-s-tile-3495495-.htm
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