Wall Insulation in Sacramento

Plenty of Sacramento homes — especially mid-century builds — have little or nothing inside their wall cavities. Cold walls in winter, hot walls in summer, rooms that never match the thermostat. The fix doesn’t require tearing out drywall. Get your free estimate — free matching, no obligation.

How It Works

Dense-pack blown-in cellulose or fiberglass: small holes (about 2 inches) are drilled in each wall cavity — usually from the exterior — insulation is blown in under pressure until fully packed, and the holes are plugged and sealed. Most whole-house wall jobs take 1–2 days.

What It Costs

Most Sacramento whole-house wall projects land between $2,000 and $5,000. Exterior access (through siding or stucco) is usually cheaper than interior access (through drywall, which then needs patching and paint).

Why It Matters in Sacramento

Wall insulation slows heat pouring through sun-baked exterior walls in summer and stops drafts in winter. Homes with empty walls often see the biggest comfort jump from this single upgrade — particularly west- and south-facing rooms.

Dense-Pack vs. Injection Foam

Dense-pack cellulose/fiberglass: the standard retrofit — cost-effective, fills around wiring and pipes, no demolition.

Injection foam: liquid foam injected into cavities that expands and hardens — better air-sealing, higher cost. Worth discussing for problem walls.

Wall insulation qualifies for the 25C tax credit: 30% back on materials and labor, up to $1,200/year.