Serving: WashingtonOregonIdahoMontana

(253) 271-7135

Service Area

Gypsum Concrete Underlayment in Seattle

Computer-batched pours, documented QC, and code-ready sound control for multifamily builders in Seattle.

Tight Sites. Tall Wood. Documented Floors.

Seattle multifamily is built on lots with no slack — a 5-over-1 shoehorned between an arterial, an alley, and a neighbor’s property line, with one curb lane for staging if the street-use permit gods are kind. Our batch plant was made for that reality. The Smart Batch® GC-1 is a single 25-foot trailer that sets up on its own hydraulic jacks in under 10 minutes, batches from enclosed supersacks with roughly 94% less airborne dust than bag-breaking (per Smart Batch Systems), and pumps to upper floors while occupying one parking strip. No batch-yard sprawl, no dust cloud drifting over the neighbor’s condo balcony, no second mobilization convoy.

Building in Seattle

Seattle’s upzones and its urban-village strategy keep the pipeline full of exactly the assemblies gypsum concrete exists for: podium and mid-rise wood frame over concrete, where every residential floor needs its UL-rated assembly and the IBC’s STC 50 / IIC 50 between units — ratings tenants in a hyper-competitive rental market will absolutely notice if you miss. Seattle projects also run design-heavy specs and closeout-heavy owners: our per-batch cloud QC reports give your closeout file a document trail most gypcrete subs cannot produce. On schedule-critical urban jobs, up to 40,000 sq ft/day of pour capacity means the floors are never the critical path.

Bidding a Seattle Project? Send It Over.

Plans, spec section, pour window — we respond with a number and a date. Request a Free Estimate · (253) 271-7135

Recent Work Near Seattle

Project photos from Seattle-area pours are being added. Want references for your project type? Ask us directly.

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Send plans, get a number. Multifamily underlayment, sound control, leveling, and elevated-deck waterproofing across WA, OR, ID & MT.