Chimney Cap Installation in Van Nuys - Custom Fit, Lifetime Warranty

A single-flue stainless steel chimney cap on a typical 1950s or 1960s ranch-style home in the Sherman Oaks flats runs $160 to $635 installed, depending on flue dimensions and whether the existing crown needs minor patching first. Multi-flue caps, common on the two-fireplace floor plans along the Van Nuys border, cost more because they require custom measurement and a wider mounting frame. Galvanized steel saves about 30% upfront, but we don't recommend it here. Studio City sits close enough to the Sepulveda Pass approach that moisture-laden marine air funnels through the corridor, and galvanized caps corrode within three to five years. Stainless with a lifetime warranty is the better investment.

When a Level 2 inspection is triggered during escrow, the scope of a cap install often expands. NFPA 211 requires a camera scan of the full flue interior, and if that scan reveals cracked liner tiles or deteriorated mortar joints, the appraiser may flag the chimney as a safety deficiency. We see this regularly on mid-century masonry chimneys in Studio City where decades of minor earthquake movement have opened hairline cracks. In those cases, the cap installation becomes part of a broader chimney repair package. If you're buying or selling, scheduling the inspection and cap work together saves a second truck roll and keeps escrow on schedule. Wilson & Son Chimney Contractors handles both under one estimate.

The technician starts on the roof with a visual crown inspection. On homes near the Sherman Oaks flats and across the Van Nuys border, we commonly find crowns poured thin during original construction, with weather cracks that let rain pool around the flue tile. If the crown is structurally sound, we clean the surface and move to measurement. The flue opening gets measured at both the interior and exterior edges because older clay tiles aren't always perfectly square. We also measure the wind exposure. Properties along the Sepulveda Pass approach catch stronger gusts during Santa Ana events, so caps installed there need mechanical fastening with masonry screws rather than friction-fit clamps. Every cap we install includes a mesh spark arrestor screen that meets Los Angeles fire code, which requires openings no larger than half an inch to block embers and keep raccoons, birds, and squirrels out of the flue.

Once measurements are confirmed, we dry-fit the cap before any permanent attachment. The technician checks that the mesh screen sits far enough above the flue opening to avoid restricting draft. On a standard 13-by-13-inch flue tile, that means at least five inches of clearance between the screen top and the flue edge. After the fit is verified, we apply a bead of high-temperature silicone to the mounting base and secure it with stainless steel screws into the crown. The final step is a ground-level draft test with the fireplace damper open to confirm the cap isn't causing smoke rollback. We document every measurement and photo for your records, which is especially useful if you're going through a chimney inspection for an upcoming sale. Wilson & Son Chimney Contractors provides a written report you can hand directly to your agent or escrow officer.