Your smoke chamber, repaired and parged smooth in Mount Plymouth Lakes

What open joints do to the chamber wall

Mortar joints inside a chamber are exposed to heat, moisture and acidic deposits every time the fireplace is used. Over the years, some of that mortar can erode and leave open channels between bricks.

An open joint is a short path for heat and gases into the wall. It also gives deposits a place to lodge where a brush cannot reach. We rake out loose material, fill the joints with refractory mortar and then parge, so the wall is sealed and smooth from the throat to the flue.

• Heat reaches deeper into the wall
• Deposits lodge out of brush reach
• Loose mortar falls onto the damper

Water on the smoke shelf

Rusty stains, wet debris and a musty odor at the fireplace are all clues that water is getting to the smoke shelf. The water usually enters at the top of the chimney, through an open flue, a cracked crown or a gap around the cap.

Fixing the shelf without stopping the water only buys time. When we find water signs, we trace them upward and list the source repair separately, whether that is a cap, a crown or the flue top. You choose the order in which the work gets done.

Reshaping a lopsided chamber

Some chambers lean hard on one side, have a pocket above the damper or narrow unevenly toward the flue. The chamber coating data sheet we follow describes using the material to reshape fireplace smoke chambers, as well as to smooth jagged edges and corbels.

Reshaping means building the coat thicker where the wall needs to come in and thinner where it is already close. We explain what the finished shape should look like, where the limits are and how the work affects curing time.

When the chamber does not need work

Not every chamber inspection ends in a repair. Some chambers are parged and sound, some stepped chambers are clean and tight, and the concern that prompted the call lies somewhere else.

When that is what we find, we tell you and point to the part that needs attention, if any. The written findings still give you a record of the chamber's condition, useful for the next inspection or a future sale.

Stone and brick faces during chamber repair

A fireplace with a stone, tile or painted brick face needs extra care during chamber work, since the coating can stain porous surfaces if it splashes and sets.

We mask the face and hearth before mixing, keep buckets and tools off finished surfaces and wipe any splash immediately. Chamber repair is done from inside the fireplace and the flue, so the face itself stays in place.