Chimney Damper Repair and Replacement in Delaware County and the Main Line

Your fireplace was built with a damper plate just above the firebox. When the fireplace is in use, the damper opens to let smoke and hot gases up the flue. When the fireplace is not in use, the damper seals the chimney so conditioned air stays in the house and outside air, water, and animals stay out.

When the damper stops doing that job, the chimney becomes a hole in your house. Heat escapes, cold air pours in, and the energy bill climbs. Lou Curley’s Chimney Service can repair or replace your damper with the right unit for your setup. Our team is CSIA and F.I.R.E. certified, our founder Lou Curley is an NFI Master Hearth Professional, and on masonry fireplaces we install top mounted dampers, either a standard top damper or a top damper with a damper cap.

Call 610-626-2439 or request an appointment online.

What Does a Chimney Damper Do?

A damper has a job both when the fireplace is in use and when it is not. When the fireplace is running, the damper opens to let smoke and combustion byproducts up the flue, and it can be adjusted to help control the burn. When the fireplace is off, the damper keeps conditioned air inside the home and blocks drafts, water, debris, and animals from coming down the chimney.

So when homeowners ask whether a damper is really necessary, the short answer is yes. It is one of the components that lets you actually enjoy the fireplace without paying for it every other month on the energy bill.

Why We Install Top Mounted Dampers

Most older fireplaces in our service area were built with a throat damper, the cast iron plate that sits just above the firebox. Throat dampers do the job at the bottom of the flue, which means they have to handle the full heat of the fire. Over time the plate warps, the frame rusts, and the metal-on-metal seal gets sloppy. Even a new throat damper leaks some conditioned air up the flue, because the seal is never airtight. That is why we do not replace throat dampers.

On masonry fireplaces we install a top mounted damper instead. Top-mount dampers sit at the top of the chimney, look similar to a chimney cap, and operate by a cable that runs down through the flue to a handle near the firebox. They include a built-in rubber gasket, so when they close they form a true airtight seal. That means 100% of the heat and conditioned air stays in the home, not up the flue.

There are two versions, and the difference is simple. A standard top damper and a top damper with a damper cap both keep water, animals, and debris out of the chimney when they are closed. The damper cap version adds a screen, which means the flue stays protected while the damper is open and the fireplace is in use. If you need a chimney cap anyway, that is usually the version worth having.

One limitation worth knowing up front: we do not replace dampers on factory built fireplaces. On prefabricated units there is usually no approved replacement part available, and fitting a component the manufacturer has not listed for that fireplace is not something we will do.

Signs Your Damper Needs Repair or Replacement

Because the damper is in the path of fire, smoke, and weather, it wears down. A few signs it is time for our team to take a look:

• You are having trouble opening or closing the damper.
• You feel more downdrafts in the home than you used to.
• You smell smoky odors in the house even when the fireplace is not in use.
• You hear clanking or banging from the chimney on windy days.
• It is harder to keep the home at a steady temperature in winter or summer.
• Water has been leaking into the fireplace.
• It is harder to start fires than it used to be.

These are also the kinds of issues our team catches during an annual chimney inspection, which is why we recommend yearly inspections for every fireplace in our service area.

Why Our Team and Why Not DIY

A damper is not a homeowner-grade install. Wrong size, wrong fit, or a missing seal at the top of the flue can mean smoke spillage, carbon monoxide entering the home, persistent water damage, or a damper that simply does not work. The Chimney Safety Institute of America (CSIA) exists in part to make sure this kind of work is done by trained pros.

Our team holds CSIA and F.I.R.E. certifications. Our founder, Lou Curley, is Pennsylvania’s first CSIA Master Chimney Sweep, and the company has built its reputation in Delaware County and across the Main Line on getting installations like this right the first time.

Call 610-626-2439 or request an appointment online to schedule a damper inspection or replacement.

Stainless Steel Top Mounted Dampers, Backed by a Lifetime Warranty

A lot of the top mounted dampers on the market are built from inferior aluminum. We install stainless steel, and we install the damper cap version when a screen is what the chimney needs. Like our chimney caps, our dampers are backed by a manufacturer’s lifetime warranty.

Ready for a New Damper? Call Our Team

If your damper is damaged, is not functioning, or you would like to move to a top mounted damper, call 610-626-2439 or fill out our contact form.

Our chimney and fireplace repairs team also handles related work like chimney leak repairs and chimney cap installations. Contact us today to find out more.