Altadena has the oldest wood walls we work on. The Craftsman bungalows and Spanish houses west of Lake Avenue were sided in redwood lap and shingle a century ago, over board sheathing and a single layer of felt, and most of that redwood is still there: dry, split at the ends, nail heads rusted through, and in surprisingly good shape where the paint was kept up. East of Lake the 1940s and 50s ranch houses are stucco over the same board sheathing, and the sills behind the stucco are where the water has gone.
The January 2025 fire changed the neighbourhood, and we talk about it plainly. On the standing houses, smoke and ash on the exterior is a cleaning and refinishing question first, and a re-siding question only where the finish and the paper behind it are gone; we assess wall by wall and say which. On the rebuilt lots the cladding is set by the plans and, on the foothill parcels, by Chapter 7A, and we build it as the exterior trade under the rebuilding contractor's permit.
Up against the San Gabriels the walls also take wind. Santa Ana gusts drive rain under lapped siding on the north and east faces, which is why the weather-resistive barrier, lapped and taped, matters more here than the choice of board. Matching a Craftsman profile is routine; getting the barrier and the window flashing right behind it is the job.