CHIMNEY INSPECTION DIAGNOSIS REPAIR - homeīRACING for MASONRY CHIMNEYS at Inspect - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.CHIMNEY HEIGHT & CLEARANCE CODE for details about the required height of a chimney above the building roof.In earthquake and high wind areas additional chimney support may be required by local codes, including reinforcement within the masonry structure of the chimney itself.Ĭontinue reading at CHIMNEY LEANING, SEPARATION, MOVEMENT or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. In our photo (above) the loose wobbly brick chimney was not supported at the roof and was not connected to the building - hence it moved easily and was in danger of collapse.Ĭhimneys built on the exterior of a building need lateral support every twelve feet of height as they pass up the building wall - shown in Carson Dunlop Associates sketch. Lateral Support Requirements for Masonry Chimneys ![]() An expert was needed to decide how to make this one safe.Ĭhimney bracing sketches below are provided courtesy of Carson Dunlop Associates (found at page bottom, Click to Show or Hide). If the flue were intact and there was no other damage it might be possible to secure the chimney against movement. A good wind could blow this chimney down. Watch out: don't try this at home and certainly not when there are people below, or when the flue is in use or probably any other time. Pushing gently on a tall flue like this should not produce easy movement. When we leaned on it a bit while climbing onto this roof. The chimney in our photo (above left) rocked and nearly fell over Loose wobbly masonry chimneys may be missing both lateral support (ties to the building wall) and rooftop support (Carson Dunlop's sketch, below right). When these supports are missing, even a chimney set on a solid foundation may tip, wobble, or separate from the building it serves. Lateral support may be required to tie a chimney to the building structure. Bracing Requirements for Masonry Chimneysīracing may be required for chimneys that extend high above the roof line. ![]() We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. How do we strengthen tall or wobbly masonry chimneys? This article describes when and how support is added to tall masonry flues along the building exterior wall or above the roof-line. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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