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Call us on 0208 123 9710 | Email us at info@soundstop.co.uk
Call us on 0208 123 9710 | Email us at info@soundstop.co.uk

Joist Cap 2m

£6.25
Original price £6.25 - Original price £6.25
Original price
£6.25
£6.25 - £6.25
Current price £6.25


  • Low cost and effective

  • Designed to fit standard 50mm joists

  • Delta Lw 15-17dB

The Joist Cap is the first acoustic joist treatments which combines low cost with effective sound attenuation.


The joist cap is extruded from a low density high attenuation foam based on a combination of polyolefin and specialist additives to produce foam which exhibits superior acoustic characteristics.


The Joist Cap profile has been scientifically designed so that one size fits tightly over a rough cut or planed standard nominal 50mm joist resulting in a stable floating floor surface, completely isolated from the rest of the structure.

The castellated top contact surface optimises the acoustic attenuation properties of the foam. By moving the mass layer above the resilient layer the floating element forms a stiffer structure spreading the load and lessening the diaphragm affect, whilst the resilient layer acts to dampen and absorb the sound energy.

Product Application

Where you are looking to create a floating floor working directly off joists then the joist cap is very cost effective means of doing so.

The joist caps fit snugly onto the existing joists up to a width of 50mm. A floating tongue and groove floor(typically tongue and groove chipboard) can then be installed on top of it. We would recommend the use of angled flanking band in this set up to effectively seal the sides of the floating floor.

A superb, easy to fit, Direct To Joist System, engineered as a Part E compliant acoustic joist treatment, to save the developer time and money. It can be used in both new build and refurbishment projects for timber and masonry builds.

This product, used upside down, can also provide the resilient layer required for customers to make up their own resilient battens.

If the product is used in this manner, on a concrete floor, impact improvements in the order of:

  • Delta L w22dB with a standard batten
  • Delta L w24dB with a deep batten can be expected
  • Robust Details only require an improvement of Delta L w17dB

If the product is used in this manner, on a timber floor, improvements in the order of:

  • Delta R w+C; tr14dB
  • Delta L w20dB can be expected

Robust Details only require an improvement of:

  • Delta R w+C; tr13dB
  • Delta L w15dB
Please contact our team if you have any questions about this product

Here are the main details for this product:

Dimensions: 50mm x 2.0m

Thickness: 12mm

Pack Size: 1 Length

Weight: NA

Density: NA

Coverage: sqm

Fire rating: NA

Thermal Conductivity:

Visit our Fitting Instructions section for more detailed instructions relating to your specific application.

Please contact our team if you have any questions on this product.

Looking for a complete soundproofing solution?

If your looking for soundproofing for a particular situation or application, then the best place to start is with our soundproofing solutions that cover walls, floors, ceilings and reducing echo. Select the relevant application below to find out more.

Wall Solutions

Floor Solutions

Ceiling Solutions

Echo Solutions

Instructions for use

Care should be taken to comply with all relevant Safety and Building Regulations.

The Joist Cap can be fitted from either above or below the joists and even before the joists are fitted.

The jaws of the caps are slightly tapered in to ensure a tight friction fit. Simply open the jaws and sit the cap over the joist ensuring the base is located tightly with the joist surface.

In all applications, our perimeter isolation strip must be used so the floating floor is fully isolated for the structural floor and walls.


Visit our Fitting Instructions section for more detailed instructions relating to your specific application.

Check out our Soundproofing Guides for more information, advice and tips on all aspects of soundproofing.