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South Berkeley custom office build by Beyond Green Construction

South Berkeley

Detached office in South Berkeley with new shou sugi ban siding

South Berkeley Office

A 160 sq ft detached office in South Berkeley that doubles as a guest room. It’s built to be cheap to heat and cool: 9-inch double 2×4 walls insulated to R-40 (R-15 is standard), 7 inches of closed-cell spray foam in the roof for R-49 (R-28 is standard), and an insulated 6-inch concrete slab. The siding is shou sugi ban from Nakamoto Forestry: Japanese cedar, charred the traditional Japanese way so it lasts outdoors. It’s still under construction. Finished photos are coming.Learn more about this project

Location
South Berkeley, Berkeley
Project
Detached office
Year
2025–2026 · In progress
Size
160 sq ft · Office and guest room
Liquid applied WRB on the walls of the South Berkeley office, with the first courses of charred cedar siding going on below
Behind the WallsThe story behind this job, in two partsProsoco: The Best In-Wall WaterproofingWhy we rolled a liquid applied WRB onto the walls instead of stapling up house wrap, and how taped ZIP sheathing alone kept the roof dry through two big storms.Read part 1 →
  1. 1Prosoco: the best in-wall waterproofing5 min read
  2. 2ZIP sheathing: what is it, and why do you want it under your roof?6 min read

Construction

22 photos
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