Sound Lock™ Soundproof Double Door

Sound Lock™ Soundproof Double Door

The Sound Lock™ Soundproof Double Door is the high-end soundproofing solution for double doors. Engineered as a top-performance acoustic barrier, this dual-door system delivers STC ratings up to 56 in a refined, customizable design. From recording studios and control rooms to conference spaces and luxury interiors, every detail is crafted for durability, precision, and seamless integration with your architectural vision with a wide range of wood species, finishes, and view window styles.

Features

• Serious Sound Control – Achieves up to STC 56 for professional-grade noise isolation.
• Custom Fit & Finish – Choose exact sizes, wood species, finishes, and window styles.
• Pre-Hung for Easy Install – Ships ready to install and paint or stain for a perfect fit.
• Tough and Timeless – Solid wood construction built to perform and look great.
• Fire-Rated Option – 60-minute fire rating available for added safety assurance.
• Hardware Friendly – Compatible with standard, custom, or electronic locking systems.
• Made in the USA – Expertly crafted domestically for quality and quick turnaround.

Specs

Resources

Material Testing

Sound Transmission Class

All view windows use the same construction as our Tru Acoustics soundproof windows (STC 49) to maintain soundproofing integrity. 

Installation Instructions

Always read the full install guide prior to beginning installation! Each Sound Lock Soundproof Door weighs 350 lbs and is designed for top-end soundproofing. Installation should be done with tight tolerances and attention to detail.

1. Prep Rough Opening – Confirm the rough opening dimensions and ensure it’s double studded. Back steel studs with wood for added strength. The bottom seal must close against a solid surface—no carpet or soft flooring underneath.
2. Unpack & Position – Remove the bottom plate, verify door swing directions, and carefully place the double-door frame into the opening.
3. Shim & Secure Hinges – Shim behind each hinge on both doors, replace temporary screws with heavy-duty ones, and confirm both hinge jambs are plumb and aligned.
4. Align Meeting Stiles – Adjust each door leaf for a consistent 1/8" reveal where the doors meet. Fine-tune shims and strike alignment to ensure smooth operation and tight closure.
5. Jamb Extension (if needed) – Cut extension to fit jamb, then glue and nail securely in place.
6. Seal Door Frame – Insert backer rod, apply acoustical sealant along the perimeter, and reinstall trim for a clean, airtight finish.
7. Hardware & Seals – Install handle sets, flush bolts, and secondary seals. Adjust perimeter and bottom seals for even contact. Finish by adding the wood cap kit to conceal jamb seals and complete the look.

Detailed step-by-step instructions are in our Sound Lock Soundproof Door Install Guide.

Common Product Uses

To learn more about your options, check out our article on how to soundproof a double door.