Your smoke chamber, repaired and parged smooth in Airport North

How deposits build up on rough walls

Smoke cools as it rises through the chamber, and some of what it carries condenses on the walls. On a rough or stepped surface, those deposits have ledges and pockets to collect in, and each fire adds a little more.

A heavy layer changes the chamber shape and hides the masonry underneath. It also has to come off before any repair. Parging leaves a surface that is easier to brush clean at future sweeps, which is one of the practical reasons homeowners choose it.

Firebox repairs listed apart from the chamber

The firebox below the damper takes direct flame and has its own wear, from cracked firebrick to eroded joints. When a chamber job reveals firebox damage, it is written up as firebox repair, a separate item.

Doing both on one visit can save time, since the room is already protected and the fireplace is out of use for curing anyway. We price each part on its own, so you can see the chamber cost clearly and add the firebox work only if you want it.

Other parts that affect how a fireplace draws

When a fireplace draws poorly, the chamber is one suspect among several. The size of the opening compared with the flue, a damper that does not open fully, a short or blocked flue and a cold chimney at start-up can all play a part.

We look at the whole passage during the free inspection instead of assuming the chamber is at fault. If another part is the main issue, we say so and scope that repair separately. The chamber gets work only when it needs it.

• Opening size compared with the flue
• Damper that does not open fully
• Flue height, blockage or liner damage

Naming the product in the estimate

Two chamber quotes can look alike until you ask what goes on the walls. We write the product name into every chamber estimate, along with the walls it covers and the planned thickness.

That lets you compare quotes fairly and keep a record for future inspections. If a different product would suit your chamber better once we open it up, we explain why before making any change to the plan.

What we look at during a chamber inspection

We begin at the firebox, open the damper and look up into the chamber with a strong light. We check the shape of the walls, the joints, any earlier coat, the buildup and the smoke shelf. Where roof access is safe, we also look down the flue to the chamber top.

We measure the opening and note the damper type and condition. Nothing is taken apart at this stage. The purpose is a clear picture of the chamber, and the written estimate follows from it.