Footing settlement
A chimney footing carries a very concentrated load. If the soil beneath it consolidates or was never adequate, the chimney tips toward the settling side.
Basement problem
A chimney that is leaning, tilting or pulling away.
A masonry chimney is heavy and usually carried by its own footing. When it moves independently, the footing is generally the reason.
How urgent is it?
Get it looked at promptly.
A leaning masonry chimney is a falling hazard, and a separated flue serving an active appliance is a combustion-safety concern.
Likely causes
What usually produces this.
More than one can apply at the same property, which is why the inspection traces the actual path rather than assuming the most common one.
Frost heave
A footing above frost depth, or one in poorly drained soil, can be lifted each winter and never return to exactly where it started.
Water and freeze-thaw damage
Missing caps, failed flashing and saturated brick let water into the masonry, where freezing breaks down mortar and spalls the units.
Deteriorated mortar
Old lime mortar erodes over decades. A stack losing its bed joints can lean or bow without the footing moving at all.
Foundation movement in the house
Where the house itself is settling, an attached chimney on a separate footing can appear to pull away when it is actually the house that moved.
Missing or failed ties
Chimneys were not always tied to the structure. Where ties are absent or corroded, nothing resists the lean.
Before anyone visits
What you can check yourself.
None of this requires tools or risk. It makes the inspection faster and the estimate more accurate.
Request an inspection- 01
Look at the gap between the chimney and the siding at the top and the bottom — is it tapered?
- 02
Check whether flashing is torn, lifted or has been repeatedly caulked
- 03
Look at the crown and cap for cracks or missing mortar
- 04
Inside, check for staining on the ceiling or wall beside the chimney
- 05
Photograph the lean from a fixed spot, dated, so change can be measured
- 06
Note whether any appliance vents into this chimney
Common questions
A Leaning or Tilting Chimney
These cover what homeowners ask most often. Your inspection addresses the conditions at your own property.
Is a leaning chimney dangerous?
It can be. A masonry chimney is a tall, heavy, largely unbraced mass, so a lean is a falling hazard. Where the chimney serves an active appliance, movement can also open joints in the flue and create a path for combustion gases. Both are reasons to have it assessed rather than watched.
Can a leaning chimney be straightened?
It depends on why it moved and what condition the masonry is in. Where the footing settled, stabilising or underpinning the footing may be part of the answer. Where the mortar has failed, rebuilding the affected section is often more realistic than trying to move the existing stack.
Why is the chimney pulling away from the house?
Either the chimney moved or the house did. A chimney usually sits on its own footing, so the two can settle at different rates. Determining which one moved changes the repair entirely, which is why the assessment looks at both.
Service area
Inspected across Greater Burlington.
Burlington, South Burlington, Winooski, Colchester, Essex, Essex Junction, Williston, Shelburne, Charlotte, Hinesburg, Milton, Richmond, Westford, Jericho, Underhill, Cambridge, Jeffersonville, Fairfax and nearby northwestern Vermont towns.
Request local service
Get this looked at properly.
Describe what is happening and when you would like the property inspected.