Why you should cap the chimney
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Yes it is necessary to replace hair line cracks in the liner! The Terracotta tiles are design to expand and contract when they get hot and cold. So if it looks like a hair line crack now its gonna get bigger when you heat up the flue tiles.
tcclary2010 1 year ago
Dude, is it necessary to replace hairline cracked flu , if so, Wouldn’t you basically have to tear down the chimney to replace the entire flu?
demolitionbarbiedoll 1 year ago
No fill brick? No crown? This is what happens when carpenters build chimneys.
nighttrainjames 1 year ago
@arctsv filled solid are u serious?????
emutiny 1 year ago
no whythes???? and was there not crown at all? flue tiles can not be bonded to the crown at time of poor, need to allow movement for thermal expansion, that is a large void to fill with thermix but that would be effective.
lovejoyb1983 2 years ago
fill void with with grout mix (portland & sand mix) this will encase and protect flues and make stack solid. the way it should be! not loose fill material ! only other option is tear down and rebuild properly. solid with each with flue spaced apart approx 6"+ with conc block between them.proper tappered crown, use a penetrating sealer not topical type.you never know what your geting into untill your start removing the top all this should be discussed with client prior start of project.
mabiusmasonry 2 years ago
After relaying or repointing the damaged mortar joints, filling the cavity with Chim-Mix or TherMix insulation and then pouring a proper Concrete crown that overhangs the edge of the chimney by at least 2 inches with a drip edge would be a much better way to repair this problem. Applying ChimneySaver water repellent to the exterior would greatly reduce further water penetration problems.
chimchereeB 3 years ago
Wow...that whole structure appears to be just a hollow brick chase holding clay flue liners. That could never be built in California or any other area subject to seismic activity; it would have to be filled solid, rebarred, and finished with a proper crown. To economize, solid block chimneys are periodically constructed within wood framed chases a flashed with a metal chase top.
arctsv 3 years ago
Was this chimney hollow? I have found many chimneys that are built large for aesthetic value but are not filled with fill brick. I have seen crowns cast on PLYWOOD! LOL! The cavity holds 100 humidity year round cause bricks are so porous. Moss grows and brick spall. Joints rot as quickly. Relay the top 4 courses, fill it with #2 washed gravel and cast a PROPER crown out of type "N" masonry cement...$1125 out of my shop. Thank you for sharing, GOOD VID! TCW
thechimneywright 3 years ago
actually the chimney is falling apart from having over sized chase <chimney walls> which in turn creates excesive moisture build up with in the chimney chase that rises to the top of the chase trying to escape through the crown. if chase vents are not installed when the chimney is repaired it will happen again sooner than later
LLpeteJ 5 years ago