The cap is the smallest part of a chimney and one of the most important, and on the open flues common across North Philadelphia it is often the cheapest fix with the biggest payoff. An open or missing cap lets rain pour straight down the flue, invites squirrels, raccoons, and birds to nest in the smoke chamber, drops leaves and debris into the passage, and lets wind gust back down into the house. FlueShield Chimney Sweep installs chimney caps across North Philadelphia that are sized to the flue they sit on, screened against animals, and set to keep water and weather out while the smoke still draws clean. It is a small job that prevents a long list of expensive ones.
- Cap sized to the specific flue, not a one-size guess
- Stainless or galvanized caps to suit the chimney and budget
- Animal screen to keep out birds, squirrels, and raccoons
- Rain kept out of the flue, damper, and smoke chamber
- Multi-flue and shared-stack caps for attached rowhomes
- Free measure-up and an honest written price
What an open flue lets into a North Philly chimney
An uncapped flue is an open pipe pointed straight at the sky, and everything that falls or climbs in does damage. Rain is the worst of it. Water that pours down an open flue rusts the damper, soaks the mortar between the flue tiles and washes it out, corrodes any metal appliance connection, and pools on the smoke shelf, and on these older North Philadelphia stacks that steady wetting accelerates exactly the freeze-and-thaw cracking that takes a chimney apart from the inside. A cap is the single piece that keeps the inside of the flue dry, and a flue that stays dry lasts dramatically longer than one that does not.
Then there are the animals. An open or screenless flue is prime real estate for squirrels, raccoons, and birds, which nest in the smoke chamber and the flue, and a nest is both a fire hazard and a draft blocker that can push smoke and carbon monoxide back into the house. We pull more than a few nests out of uncapped North Philadelphia chimneys every season, often from a flue the homeowner assumed was sealed. Leaves and wind-blown debris drop in the same way, narrowing the passage and feeding blockages, while an uncapped flue also lets gusts blow straight back down it, the cause of a lot of the smoky rooms and backdrafts people blame on the fireplace itself.
A cap fitted to your flue, not pulled off a shelf
A cap only does its job if it actually fits the flue, and the rowhome stacks across North Philadelphia come in a real range of sizes and configurations, from a single round clay tile to a wide rectangular flue to a multi-flue stack carrying a fireplace and a furnace in the same chimney. We measure the flue, or the whole stack on a multi-flue chimney, and fit a cap built to match it rather than forcing on a generic one that leaves gaps or blocks the draft. The cap has to clear the flue opening so the smoke draws freely, screen the opening against animals, and be anchored well enough to hold through the wind these tall stacks catch.
We fit stainless or galvanized caps depending on the chimney and the budget, and on the attached rowhomes so common here we handle the multi-flue and shared-stack caps that cover more than one flue on a single chimney, which is its own job to get right so each flue still drafts on its own. Where the crown the cap mounts to has already cracked, we will tell you, because a cap anchored to failing masonry will not stay put, and the crown is worth handling at the same time. The aim is a cap that keeps the flue dry and clear for years, asking nothing of you once it is on.
Small part, big return on an old stack
Of all the work a chimney can need, a cap is among the best values, precisely because it heads off the slow, hidden damage that nobody notices until it is serious. A cap costs a fraction of the crown rebuild, the reline, and the masonry repair it prevents by keeping water and animals out of the flue, and on a North Philadelphia chimney it also stops the downdrafts and the blockages that make a fireplace smoke and a furnace struggle. A good cap is quiet insurance for the whole stack beneath it.
We will measure the flue at no charge and tell you exactly what your chimney needs, with an honest estimate in writing. If your chimney is open at the top, or the old cap is rusted through, gone, or missing its screen, the fix is usually quick and inexpensive, and it is one of the easiest ways to add years to the life of the flue. A cap also pairs naturally with a crown repair or a sweep, since the crew is already up there, but it never has to wait on a bigger job. If the flue is open, capping it is worth doing on its own, before the next hard rain or the next nesting season.
Pulling your whole chimney project together
A chimney is a system, so chimney cap installation rarely stands alone, it connects to chimney sweeping service, pre-season chimney inspection, chimney leak repair, flue relining, masonry restoration, and our crew handles all of it under one roof. We bring the same service to Chimney Cap Installation in North Philadelphia, Chimney Cap Installation in Olney, Chimney Cap Installation in Logan, Hunting Park chimney cap installation and everywhere else across the Philadelphia area.
If you searched for local chimney service, you have reached a local crew, call 215-645-7630 any time. For background, read The Tall, Narrow Rowhome Flue: Why North Philly Chimneys Are Harder to Sweep Right on our blog, or head back to our Philadelphia home page to see everything we do.