Top mount damper installation for Thornton Park homeowners
Tell us how the fireplace behaves. Our pros in Thornton Park handle the roof work, the fitting and the handover.
- Licensed & insured
- Locally run
- Family owned and operated
- Same-day service available
What goes into your top damper quote in Thornton Park
Your written damper scope in Thornton Park starts here and shows 10% off if you book within 72 hours after the inspection.
- What the fireplace burns and any appliance in the firebox
- Clamp tension set and the seal checked from the roof
- Existing cap removed or kept, stated in writing
- Workmanship warranty and the maker's warranty terms
Damper points that decide the fit in Thornton Park
The points below shape the damper we recommend in Thornton Park, and each one appears in your estimate.
How it differs from the damper at the throat
A throat damper is a metal plate just above the firebox that pivots open and shut. Cast-iron throat dampers close metal on metal, and as they warp and rust, small gaps open around the plate.
By contrast, a top-sealing damper closes the whole flue at its outlet on a gasket, and it also keeps rain and debris out of the flue above the throat. During the inspection we explain which of the two suits your fireplace, and we put the reasoning in writing so you can weigh it at your own pace. Many homes end up using both, with the old throat plate left open and the new top damper doing the sealing.
Setting the clamp for a tight seal
The seal depends on how firmly the lid is pulled down. In the Lock-Top instructions, the adjustment clamp is slid up the cable to the bracket, the cable is pulled to close the damper, and the clamp is set for the tightest seal.
We set the tension, then check the closed lid from the roof to confirm it sits evenly on its gasket. Too little tension leaves gaps, while too much strains the parts, so the setting is checked rather than guessed. The clamp setting is noted, so a later adjustment starts from a known point.
Homes with two fireplaces
Two fireplaces mean two flues, often in the same chimney. Each flue that suits a top damper needs its own, with its own cable and handle in its own firebox.
We check both flues and both fireboxes and quote each damper separately, so you can do one or both. The handles are set up the same way in each fireplace to keep things simple. If only one fireplace suits a top damper, the other gets its own recommendation.
Adding a damper after chimney repairs
A crown repair, a new flue top or a tile repair is a good moment to add a top-sealing damper, since the top of the chimney is sound and freshly prepared. A new crown usually needs time to cure before anything is glued to the tile beside it, and we plan around that.
We can plan both jobs together so the damper goes on once the repair has cured. Each part is priced separately, and the order of work is written into the estimate. Planning them together also saves a second setup of ladders and roof protection.
Other work in Thornton Park
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- Fireplace RestorationBring an unused fireplace back with a coordinated plan.
- Ventless Gas Fireplace ServiceService the unit within its exact installation limits.
Learn more about top-sealing damper installationThornton Park services
Answers about top-sealing dampers for Thornton Park homeowners
If your damper question is not here, our Thornton Park team is a phone call away.
Does the old throat damper have to come out?
Not always. It can be left fully open, fixed open or removed, as long as it cannot close on the cable. We explain the plan for your plate before any work starts.
Will rain get in when the top damper is open?
With a plain top damper, yes, the flue is open while the lid is up. Models with a built-in cap, or a matching separate cap, cover the flue while the damper is open. We explain which suits your chimney.
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