Siding in Bonny Doon, CA

Two stressors the wall has to carry together

Bonny Doon's ridge canopy keeps north and west elevations damp and slow to dry, while the same wooded slopes carry severe, CZU-demonstrated fire exposure. A re-side that hardens without a drying strategy traps the canopy moisture and rots; one that ignores fire leaves the ridge undefended. We resolve both deliberately — Class A non-combustible cladding and hardened eave, vent, deck, and ground transitions built over a rigorous rainscreen drying plane, so neither problem is traded away for the other.

Post-CZU rebuilds and surviving homes on the same ridge

The Bonny Doon ridge holds a mix of homes the CZU fire spared, structures lost and now rebuilding under strengthened WUI code, and older forest houses with pre-fire detailing intact. Each needs a different re-side conversation. Rebuilds get current-code ignition-resistant cladding from the framing out; surviving homes warrant aggressive retrofit hardening because the terrain that burned in 2020 has not changed. We say honestly which posture a given parcel calls for rather than wrapping every ridge house the same way.

Chapter 7A on an exposed mountain shelf

Because Bonny Doon sits inside a state-mapped Very High Fire Hazard Severity Zone, a re-side here is governed by California's Wildland-Urban Interface code, Chapter 7A, and that standard rewrites the whole spec. The combustible wood lap and shingle so common on these mountain homes gives way to ignition-resistant cladding — fiber cement, mineral board, or listed noncombustible panels that have passed the SFM 12-7A-1 exterior wall flame test. On an open ridge the wind-driven ember load is relentless, so the detailing matters as much as the panel. We close the bottom course with noncombustible flashing and trim so embers cannot lodge behind the cladding, harden the eave and soffit returns, and pair the new wall with ember-resistant venting where soffits and crawlspaces meet the siding plane. On a Bonny Doon parcel the cladding is one layer of a defensible perimeter that also runs through decks, the base of wall, and any rebuild-permit conditions left from the CZU recovery, so we coordinate the assembly with all of them rather than treating siding in isolation.

Remote ridge access off Empire Grade and Smith Grade

Bonny Doon's parcels are scattered along miles of narrow, climbing ridge roads — Empire Grade, Pine Flat Road, Ice Cream Grade, Smith Grade — often down long private drives with no flat staging and a fuel break of cut brush at the property line. That terrain drives real logistics for a siding job. Full lumber and pallet deliveries frequently cannot turn around on a one-lane forest drive, so material gets broken into smaller loads and staged or hand-carried, and scaffold has to be footed on sloped, root-bound ground rather than open lawn. The ridge canopy keeps walls shaded and slow to dry, so we sequence tear-off and re-wrap to avoid leaving sheathing open through a damp mountain night. Tree and root protection is part of the plan, since second-growth redwoods crowd many walls, and we confirm whether a parcel falls under county defensible-space clearance review before scheduling, because that can change how much vegetation must be cleared from the work zone before a crew can even set up.

Fiber Cement Siding for Bonny Doon homes

The full fiber cement siding approach — materials, weather-resistive detailing, and the manufacturer standards we install to — is covered on the main service page, then specified for Bonny Doon's conditions on this one.

Full Fiber Cement Siding details →

Our Bonny Doon process