What fitting a new cap involves
A chimney cap sits over the top of the flue. It keeps rain, leaves and animals out while still letting smoke and gases escape. Installing one starts with measuring the flue opening or the crown. Next comes choosing a cap that fits both the chimney and the appliance it serves. The cap is then fastened so wind can't lift it off. Before anything is mounted, the top of the flue is checked so a new cap doesn't go over damage that should be dealt with first. For materials, styles and the full process, read how chimney cap installation works.
Two El Cerrito requirements that involve the chimney top
Rental properties: vent caps are on the checklist
El Cerrito's Residential Rental Inspection Program checklist (EMC Chapter 16.30) asks whether all fuel-burning appliances, including fireplaces, terminate above the roof line and have vent caps. (Source: City of El Cerrito – Residential Rental Inspection Program, Rental Safety Checklist.)
This applies to owners of rental units covered by the program. A fireplace chimney with no cap fails a question the inspector will ask, so fitting the cap before the inspection removes one item from the list. The checklist item has two parts. A cap answers the vent cap part, but it does not change where the chimney ends in relation to the roof line. Commercial and property-manager work is offered, so landlords with more than one unit can arrange caps for several chimneys at once.
Roof work: the chimney top is part of the inspection
The City of El Cerrito Building Division's rooftop equipment inspection requirements state that a chimney spark arrester shall be installed with any repair, replacement or alteration to the roof of an existing structure. (Source: City of El Cerrito Building Division – Inspection Requirements: Rooftop Equipment, rev. 12.16.24.)
This applies to any existing home in El Cerrito that is getting roof work, not only a full reroof. The practical effect is timing. If a roofing project is coming up, plan the chimney top as part of it, so the arrester isn't left for the final inspection. Many chimney caps have a mesh screen around the sides. Whether a particular cap and mesh is what the inspector expects is worth confirming with the Building Division before the roof is closed up.
Planning roof work?
Mention the chimney when you request an estimate and say that roof work is planned. The cap and arrester can then be scheduled around the roofer rather than after them.
When a cap is the right job, and when it isn't
- The cap is missing, rusted through, dented or has blown off: a new cap is the job.
- A rental unit is due for inspection and the fireplace chimney has no vent cap: a new cap covers that checklist item.
- A roof repair, replacement or alteration is planned: the arrester requirement makes the chimney top part of the project.
- The chimney doesn't extend above the roof line: a cap won't fix that. It's a question of the chimney's height and condition, which can be looked at during the estimate.
- A fireplace is being added or swapped out: the venting and its cap are planned along with the unit, so start with fireplace installation for homes in El Cerrito.
If you're still unsure whether your chimney needs one, read a short guide on whether a home needs a chimney cap.
Booking a cap installation
Our chimney cap installation service covers the job in more detail. For other chimney, fireplace and dryer vent work we do locally, go to all our services in El Cerrito. When you're ready, call or request an estimate.
Sources (2)
The sources of the El Cerrito facts on this page.
- 1City of El Cerrito - Residential Rental Inspection Program, Rental Safety Checklist
- 2City of El Cerrito Building Division - Inspection Requirements: Rooftop Equipment (rev. 12.16.24)
