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Soundproof existing 7 × 7 wall by adding a Type X layer

Project 003Minnetonka, MN 55343Posted 15 days ago
Open for estimates
Estimates close
Oct 7
Estimates
9 estimates
Work type
Labor only
Preferred timeframe
October 9–17, 2026
Project area
Minnetonka, MN 55343

Scope of work

Add soundproofing layer

  • Install owner-provided 5/8" Type X drywall over the existing 7' × 7' laundry room wall (49 SF), staggering new seams from existing seams.
  • Apply owner-provided Green Glue Noiseproofing Compound between layers and fasten the new drywall into framing with appropriately sized screws.

Close ductwork openings

  • Cover existing oversized openings with new drywall fitted closely around HVAC ductwork, leaving approximately a 1/4" perimeter joint for owner-provided Green Glue Noiseproofing Sealant.
  • Cut and fit the new 5/8” Type X drywall closely around the existing HVAC ductwork to close the oversized openings.
  • Seal completely around the ductwork with owner-provided 3M Fire Barrier Sealant CP 25WB+, applying a continuous bead on the perimeter.

Finish and prime

  • Tape, mud and sand the new drywall smooth using owner-provided tape and joint compound.
  • Apply one coat of owner-provided primer over the finished 49 SF wall.

Final scope of work to be confirmed and agreed upon by the homeowner and service provider before work begins.

Contractor-provided materials

2" drywall screws, 1-lb box1 box

Estimated quantities are preliminary and subject to field verification.

Main product(s) for this project

purpose Waterpurpose WaterLowe’sQty: 1 quartView product
USG Sheetrock Brand 5/8 in. x 4 ft. x 8 ft. USGUSG Sheetrock Brand 5/8 in. x 4 ft. x 8 ft. USGHome DepotQty: 2 sheetsView product
SHEETROCK Brand 1.75 Pints Premixed DrywallSHEETROCK Brand 1.75 Pints Premixed DrywallLowe’sQty: 2 pailsView product

Approximate project location

Approximate project area: Minnetonka MN 55343