Ceiling System 2 Timber Joist Soundproof Kit

Materials supplied with this system:

• Acoustic insulation 100mm/60kg/m3 – High-density sound insulation slabs
• Soundbreaker Bars 3m
• Noisestop 1 Plus Panel 18mm –  12.5mm soundboard laminated with 10kg mass-loaded vinyl 1200mm x 1200mm (1.44sqm)
• Acoustic sealant 310ml

Select the required Total Ceiling Area from the dropdown box at the top of the page to see the quantities supplied with this system.

We recommend ordering areas individually and adding them to the basket rather than adding them to one large area. You can order multiple areas in the same order.

Quantity of materials supplied in your order

• System thickness 35mm (from the ceiling joist)
• Fire thirty minutes

Thermal Resistance R:

• Acoustic plasterboard 12.5 mm = 0.050 m2 K/W
• Mass-loaded vinyl 0.14 m² K/W
• Acoustic insulation 2.90 W/mK

Thermal Conductivity λR:

• Acoustic plasterboard 0.25 W/mK to BS EN 12524:2000
• Mass-loaded vinyl 0.037 W/mK
• Acoustic insulation 0.034 W/mK

Reaction to Fire

• Acoustic plasterboard 12.5mm & 15mm Euroclass A2-s1, d0
• Mass-loaded vinyl 10kg EN 13501-1 B-s2,d0 (2)
• Acoustic insulation EN13501-1: A1

Airborne Data

Untreated Ceiling Airborne DnT,w

18mm chipboard floor, 200mm joist and 12mm plasterboard ceiling 38dB

Treated Ceiling Airborne DnT,w

Ceiling System 2 58dB

Improvement DnT,w

Noise reduction with treatment 20dB

Impact Data

Untreated Ceiling Impact LnT,w

18mm chipboard floor, 200mm joist and 12mm plasterboard ceiling 80dB

Treated Ceiling Impact LnT,w 

Ceiling System 2 59dB

Improvement LnT,w

Noise reduction with treatment 21dB

Note: Every 10 decibels(dB) reduction in noise level is roughly perceived as a halving of the perceived loudness. So, for instance, if you have a sound that measures 70dB and it decreases to 60dB, it would sound about half as loud to the human ear. Decibels Explained.

Ceiling preparation

Before work can commence on installing Ceiling System 2, you must remove the existing plasterboard. Once the ceiling has been removed, you will be left with exposed ceiling joists. You are now ready to fit Ceiling System 2.

Step 1.

Infill the existing ceiling joists with the 100mm acoustic insulation slabs between them. Using a serrated knife or an old bread knife to cut the insulation slabs slightly larger than the opening between the joists will allow you to push the slabs between the joists to friction fit in place. Cover the whole ceiling area, ensuring no gaps are left between the insulation and between the insulation and the joists.

Step 2.

Fit the Soundbreaker bars to the underside of the ceiling joists at 400mm centres. Screw the soundbreaker bars into the joists using the pre-drilled holes that run along the edge of the bars; use 25mm self-drilling 25mm for this. The wider corrugated section of the Soundbreaker bars should face down into the room when attached.

Step 3.

Fit the soundproof panels to the soundbreaker bars using self-drilling drywalls. Fix the panels into the bars by screwing them into the corrugated section of the Soundbreaker bar with self-drilling drywall screws. You will not need to pre-drill holes to fasten the boarding. You should have four bars per board to fix into. When you fit each board, ensure they are tightly butted together, and apply a bead of acoustic sealant along the edge of the panels to ensure they are acoustically sealed. You can also apply sealant once you have installed all of the boards around the perimeter of the ceiling and between the edges of the panels to fill any small holes that might be left.

Allow a small gap between the panels and the walls around the edge of the ceiling. This will reduce sound vibration through the walls and ceilings. Use the acoustic sealant to fill in the gap.

Step 4.

Finish off your ceiling with either a plaster skim or taping and filling the tapered edge of the panels.

Product Brochure

Product Performance

Due to the nature of our materials, most orders are delivered on pallets. Each order is securely wrapped and palletised to ensure it arrives in perfect condition.

Deliveries are made Monday to Friday between 8:00 a.m. and 6:00 p.m., and goods will be dropped as close to the property as possible. Please note, drivers are unable to carry items indoors.

Palletised deliveries are charged at a flat rate of £60 + VAT, regardless of how many pallets are required. Smaller orders under 20kg are sent via courier at £20 + VAT.

We hold high stock levels and aim to deliver within 3–4 working days. Once your order is placed, you’ll receive confirmation of the expected delivery date. Please ensure someone is available to sign for the goods.

Need a specific delivery date or have questions? Contact us or call us on 01423 339163 – we’re happy to help. For full details, please review our delivery terms.