Chimney cap installation in brief
A chimney cap is the metal hood that sits over the flue opening at the top of the chimney. Installation means measuring the flue, choosing a cap size and style that fits, fastening it securely to the flue tile or crown, and confirming the screen leaves the flue clear to draft. A cap keeps out rain, debris and animals, and a chimney nest is one of the most common reasons a homeowner calls. For sizing, materials and the full process, read how chimney cap installation works.
What Oak Park's preservation rules mean for a new chimney cap
About a third of the Village is in a historic district
Oak Park has three historic districts: Ridgeland/Oak Park, Frank Lloyd Wright-Prairie School of Architecture, and Gunderson. Together they cover approximately a third of the Village, and all three are locally designated and listed on the National Register of Historic Places (source: Historic Preservation, Village of Oak Park). If you aren't sure whether your home is inside one of them, find out before you choose a cap. The answer can affect which style is appropriate and whether the project goes through review.
The guidelines call for a cap that suits the building
The exterior maintenance section of Oak Park's Architectural Review Guidelines recommends installing a chimney cap appropriate to the building style (source: Village of Oak Park Historic Preservation Commission Architectural Review Guidelines, adopted 12/03/2024). In practice, the cap is chosen for how it looks from the street as well as for its fit on the flue. A bulky or oversized cap can look out of place on an older masonry chimney, so profile, size and finish matter as much as the measurements.
The same guidelines pair the cap with masonry and liner work
In the same section, the guidelines recommend re-pointing open chimney mortar joints and installing a chimney liner if wood-burning fireplaces are used or if masonry inside the flue is crumbling. They also note that replacement may require rebuilding the chimney from the roof surface up (source: Village of Oak Park Historic Preservation Commission Architectural Review Guidelines, adopted 12/03/2024). For a cap job, that means looking at the whole top of the chimney before anything is fastened. Open joints, a cracked crown or a deteriorating flue should be dealt with first, because a new cap does not fix any of them.
Review for homes in historic districts and for landmarks
Oak Park's Historic Preservation Commission reviews building permit applications for exterior alterations and for full or partial demolition of properties in historic districts or designated as landmarks. A Certificate of Appropriateness review applies to landmarks and to full or partial demolition in a historic district (source: Historic Preservation, Village of Oak Park). If your home is a landmark or sits in one of the three districts, check with the Village before the work about whether your cap project needs a permit application and review. That matters most when the job grows beyond the cap itself, for example into rebuilding the top of the chimney.
Before the cap goes on
- Confirm whether the home is in a historic district or is a designated landmark
- Choose a cap style and finish that suits the building, not just the flue size
- Check the mortar joints and crown at the top of the chimney for open gaps or cracks
- Clear out any nest or debris already in the flue
- If you burn wood, have the condition of the flue and liner looked at
When a cap is the right job, and when something else comes first
- Animals or a nest in the flue: the nest and debris come out first through chimney animal and nest removal, then a screened cap keeps animals from coming back.
- Open mortar joints, a cracked crown or loose brick at the top: the masonry needs attention before a cap is fastened to it. Start with chimney repair for homes in Oak Park.
- A framed or boxed chimney instead of brick: the top is usually sealed by a chase cover rather than a masonry-style cap. Our guide to chimney cap vs chase cover explains the difference.
- Wood-burning fireplace with crumbling masonry inside the flue: the flue may need a liner, which the Village guidelines recommend in exactly that case.
- An existing cap that is rusted, loose or the wrong size: this is a cap replacement rather than a first-time installation.
Booking a cap installation
You can read the full chimney cap installation service details, or look over everything we do in Oak Park.
Free estimates.
Request an estimate for a chimney cap sized to your flue and chosen to suit your home.
Sources (2)
The sources of the Oak Park facts on this page.
- 1Historic Preservation | Village of Oak Park
- 2Village of Oak Park Historic Preservation Commission Architectural Review Guidelines (adopted 12/03/2024); Historic Preservation | Village of Oak Park
