Custom Metal Chimney Caps for Sierra Nevada Homes: Protection That Fits

A chimney without a cap is an open hole in your roof. In the Sierra Nevada — where snow, rain, wind-driven embers, and wildlife are all real concerns — that's a problem waiting to happen. Stock chimney caps from hardware stores are sized to generic flue dimensions and rarely match the architecture of a custom home.

We fabricate chimney caps to the exact dimensions of your chimney, in the material and style that fits the build.

What a Chimney Cap Does

A properly designed chimney cap serves four functions simultaneously. It keeps rain and snowmelt out of the flue, which prevents moisture damage to the liner, damper, and firebox. It blocks embers from exiting, which is critical in WUI fire zones throughout the Tahoe basin and foothills. It prevents animals — birds, squirrels, raccoons — from nesting in the flue. And it reduces downdrafts caused by wind, which can push smoke back into the house.

In mountain communities where homes may sit unoccupied for weeks during off-seasons, a chimney cap also prevents debris accumulation in the flue that could create a fire hazard when the fireplace is first used.

Materials We Work With

Stainless Steel

304 stainless is the standard for residential chimney caps. It resists corrosion from flue gases and weather exposure. For coastal or extremely harsh environments, 316 stainless provides additional corrosion resistance.

Copper

Copper chimney caps develop a natural patina that complements stone chimneys and copper gutter systems. They're the premium choice for high-end residential projects where the cap is visible and contributes to the exterior design. Copper's natural antimicrobial properties also reduce moss and biological growth.

Painted Steel

Powder-coated steel caps are the most cost-effective option and can be color-matched to the roof or trim. For wood-burning fireplaces, the coating must be rated for the heat exposure at the cap level.

Spark Arrestor Requirements

In California — including Truckee, Lake Tahoe, and Placer and Nevada counties — spark arrestors are required on all wood-burning chimney caps. The mesh must have openings no larger than half an inch to prevent embers from escaping. On the Nevada side, Washoe County and local fire districts enforce similar requirements in designated fire zones.

Every chimney cap we build for wood-burning applications includes a code-compliant spark arrestor screen integrated into the design — not bolted on as an afterthought.

Single-Flue vs. Multi-Flue Caps

Homes with a single chimney flue need a single-flue cap sized to the flue dimensions. Homes with multiple flues in a single chimney chase — common in larger mountain homes with fireplaces on multiple levels — benefit from a multi-flue cap that covers the entire chase top. Multi-flue caps provide a cleaner look and better weather protection for the chase crown.

Chase covers (full-top caps that cover the entire chimney structure) are often fabricated in one piece for prefab chimneys. These are custom-measured and bent to include drip edges that direct water away from the chase walls.

Getting the Right Measurements

Chimney cap sizing isn't complicated, but it needs to be accurate. We need the exterior dimensions of the flue or chase top, the flue height above the crown, and any obstructions or offsets. Photos help — especially for multi-flue configurations and non-standard chimney shapes.

For contractors and builders, we can work from drawings or field measurements. Turnaround on most chimney caps is fast since they're fabricated in-house at our Reno shop.