Booking around a longer burning season
A fireplace used most evenings from late autumn into spring collects deposits faster than one lit for a few holidays. For that pattern, a sweep before the season is the baseline, and a check partway through makes sense if the fire starts drawing worse or fresh black flakes appear on the firebox floor.
Late summer or early autumn leaves time to deal with anything the sweep turns up before the first cold spell, rather than finding a cracked tile in the week the fire is wanted.
When one chimney holds two flues
Older masonry chimneys sometimes carry a second flue for a furnace or water heater beside the fireplace flue. If yours does, say so when booking. The appliance flue has different deposits and needs its own attention; sweeping the fireplace flue alone leaves it unchecked.
A gas appliance flue does not collect creosote, but CSIA points out that such flues can still be blocked by nests or debris. A blocked appliance flue is a carbon monoxide risk.
Houses with fireplaces in two rooms may have two fireplace flues in the same stack. Each is swept on its own.
Let us know how many evenings a week the fireplace ran last winter, and whether the chimney serves anything else. Estimates cost nothing — describe the job and we will come back to you.
What the sweep should tell you afterward
A useful report names the deposit stage, not merely that the flue was cleaned. Dry soot and flaky deposits are routine. Glazed third-stage creosote means the burning pattern needs to change and a separate removal job is due.
It should also note the damper, the smoke chamber walls, the cap and arrestor mesh, and any cracked or missing firebrick seen on the way. CSIA describes Level 1 as the level suited to routine cleanings when nothing about the system has changed. If the report flags something that could not be seen properly, a Level 2 is the next step.
Getting the house ready the evening before
Let the last fire go out the evening before so the firebox and ash are cold by the visit. Clear the mantel and the floor in front of the hearth.
Mention pets, a locked side gate or a steep driveway when booking. They change where ladders and equipment can go.
Why sweep estimates vary between Arcadia houses
The number of flues, roof height and pitch, and how hard the fireplace was used all move the figure, and so does a damper or arrestor that has to be freed before it can be cleaned. A two-storey house with a tall brick stack needs more setting up than a single-storey house with a short chimney.