A top sealing damper fitted to your chimney in O'Neil

A handle in the firebox, a lid at the top: O'Neil top dampers fitted, adjusted and explained by local pros.

Fully licensed and insured
Locally owned
Family owned and operated
Same-day service

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(904) 920-5495 Free Inspection

Local pros who fit chimney top dampers in O'Neil

Locally owned in Jacksonville
Family owned and operated
100% satisfaction guaranteed
Free inspection and estimate
Same-day service available
10% off any service

Existing top dampers are serviced with the maker's own parts.

Free inspection and estimateYour flue tile in O'Neil is measured and the crown checked on a free visit before any damper is ordered.
Upfront pricing, no hidden feesThe model, the handle position and any tile or crown work are priced in writing up front.
100% satisfaction guaranteedIf the lid does not seal or open the way we showed you, we return and adjust it.

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A metal chimney on a factory-built fireplace

Factory-built fireplaces vent through a metal chimney listed with the unit, and parts added to that chimney have to be listed for it. A top damper made for masonry flue tiles is not something to bolt onto a listed metal pipe. Adding the wrong part to a listed chimney can take the whole fireplace out of its listing.

For a factory-built fireplace in O'Neil, we check what the maker allows before anything is proposed. If a listed damper option exists for your model, we price it; if not, we explain the choices within the listing.

O'Neil is in Nassau County. O'Neil sits a short way inland.

From the tile measurement to the handle

Cables run clean from lid to firebox
Lids adjusted to seal on their gaskets
Worn gaskets, springs and cables replaced
Bent lids straightened or replaced

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How our crew fits a top damper in O'Neil

Tile measured on the roof
The flue tile's outside size, height and rim are checked on a free visit, with the crown around it.
Model ordered to fit
The damper is chosen from the maker's size chart for your tile and approved on the estimate first.
Frame set, cable run
The frame is set in the maker's adhesive, the old plate made safe and the cable run to the handle.
Adjusted and demonstrated
The lid is adjusted to seal, and you try the handle before we leave, with the cure time written down.

Rain and a closed lid near the coast in O'Neil

Near the coast, wind-driven rain enters any open flue top. A top damper closed between fires keeps that water off the smoke shelf and the old throat damper frame.

In O'Neil, that also protects the crown joint around the tile from water getting in from above.

10% off any service booked within 72 hours of inspection

The damper, the cable and the fitting are all discounted.

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How a top damper meets the damper rule

Under R1001.7.1 of the Florida residential code, a masonry fireplace needs a ferrous metal damper set 8 inches or more above its opening. That damper may be placed low in the fireplace or high in the chimney serving it, as long as its control reaches the room.

Because it sits in the chimney and is worked from the room by cable and handle, the top damper meets the rule. The throat damper it replaces is then removed or fixed fully open so it cannot close across the flue. A throat damper left able to close would give the fireplace two dampers, and the one out of sight is the one that gets forgotten.

Keeping animals out of a closed flue

A closed top damper shuts the flue opening, so birds and animals cannot move in while the fireplace is idle. While the lid stands open during a fire, heat and smoke keep animals away from the flue.

Anything already living in the flue has to be removed before the damper is fitted, and some birds and bats are protected by wildlife rules that set the timing. We check the flue before fitting and tell you if that step comes first. Where the chimney also carries an appliance flue, that flue keeps its own screened cap against animals.

Looking after the gasket

The gasket between lid and frame is what makes the seal. Over years of heat and weather it can harden, compress or tear, and a worn gasket lets air slip past a closed lid.

Makers sell replacement gaskets for their models. We check the gasket whenever we work on or sweep a chimney with a top damper, and fit a new one from the maker once the old one has lost its spring. A quick test is to close the lid on a strip of paper and pull it; a gasket that lets the paper slide out easily is worn.

What we check before fitting a top damper in O'Neil

Frame set in the maker's adhesive, with the cure time written down
Every flue identified, with the damper on a fireplace flue only
Decorative gas appliance in the firebox checked for conflicts
Make, model and flue size written down for your records

Before the damper is ordered

Can you fit a top damper the same day in O'Neil?

The measurement can happen the same day when the schedule has room, but the damper is ordered to fit your tile. We install it once it arrives, and the adhesive then needs its set time.

Can a top damper go on any chimney?

It needs a masonry fireplace flue with a sound tile standing high enough above the crown. Flues for other appliances and listed metal chimneys are handled differently, and we tell you which applies.