SubPrimo - Installation Guide
SubPrimo
Total Party Floor Solution
Maxi 60
SubPrimo is supplied in 1150x950x6mm sheets, and is simply loose laid onto the existing floor in a brick pattern. SubPrimo can easily be cut and shaped using a standard trimming knife. It is important to ensure that the SubPrimo is installed tight up to or, if possible, under the skirting and that no gaps occur between the sheets as they are installed.
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SubPrimo Installed Beneath a laminate Floor Finish
The timber floor finish is then installed directly onto the SubPrimo, as with conventional underlays.
It is important to leave an expansion gap between any timber floor finish and the perimeter. Direct contact between the floor finish and the beading or skirting should be avoided. The skirting board should sit on a length of SRS Soundseal acoustic sealing gasket - grade 15 2/10. The Soundseal will help isolate the floor from the wall construction.
As with all floating floor installations, no fixings should be allowed to penetrate the resilient layer.
General Installation Notes
There are a vast number of floor finishes available, and, as such, the installation guidance shown is given in good faith and to the best of our knowledge. The final decision regarding the compatibility of any floor finish installed onto SubPrimo must remain the responsibility of the flooring contractor / installer. If in any doubt, please seek advice from the floor finish manufacturer.
Due to the popularity of timber floor finishes in flats and apartments, and the need to meet the acoustic standards of Approved Document E, SRS have designed a ‘Total Party Floor Solution’ that will enable clients to install any floating timber floor finish whilst maintaining a high level of acoustic insulation. The SRS ‘Total Party Floor Solution’ requires SubPrimo to be installed onto the floors and SRS acoustic building board, Maxiboard, to be used in the ceiling construction.
The system exceeds the requirements of Building Regulations Approved Document E, and also achieves a 1hr fire rating. By installing SubPrimo onto the floor above, the Total Party Floor Solution is ready to accept any timber floor finish and still give good performance on impact noise.
To install the Maxi 60 ceiling, 100mm thick 45kg/m3 mineral fibre slabs are first friction fitted between the joists. SRS resilient bars are then fixed to span the timber joists across the full width of ceiling, using 70mm x 5mm wood screws. They are fitted at the edges of the ceiling and at a maximum of 300mm centres in between. The Maxiboard panels are fixed into the resilient bars using 30mm x 3.9mm Maxi screws. The panels are secured in a staggered half panel overlap. The screw fixings are at a maximum of 300mm centres, positioned 20mm from the edges of each board and at the midpoint, ensuring the screws are fixed into the resilient bars above, and do not touch the timber joists.
A bead of Gripfix is applied to each panel's shiplap edges prior to installation. The shiplap edge adjacent to any perimeter should be removed, and a bead of SRS acoustic sealant applied to the edge. It is essential that no gaps occur between the panels.12.5mm fire rated plasterboards are then fixed through the Maxiboard and into the resilient bars using 50mm drywall screws, again ensuring the fixing does not touch the joist.
The SubPrimo is installed onto the floor above as per previous instructions.
Maxi 60 ceiling system
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