Hz PLUS – PERFORATED PLASTERBOARD SYSTEM
Hz Plus is an acoustic ceiling that looks like an ordinary plasterboard ceiling. Perforated plasterboard with acoustic fleece is fixed to timber or steel battens and finished with Hz Acoustic Plaster instead of paint. The result is the same homogeneous, white surface, but with effective sound absorption in the construction. Installation follows the fitter’s usual sequence.
Panel thickness
12.5
mm
Sound absorption class
C–D
EN ISO 11654:1997
Variants
1
Panel variants
PRODUCTS IN THE Hz PLUS SYSTEM
Hz Plus comes as a single board type, screwed onto timber or steel battens and finished with Hz Acoustic Plaster. Choose between a smooth or textured plaster.
Perforated plasterboard pre-finished with acoustic fleece. It goes on ceilings and walls as the outermost layer, finished with acoustic plaster.
| Variant | Thickness | Dimensions | Perforation | Sound class | Standard |
|---|---|---|---|---|---|
| VariantHz Plus 027+ | Thickness12.5 mm | Dimensions1200 x 600 mm | Perforation23 % | Sound classC - D | StandardISO 354:2003 |
Hz Plus is fixed to timber or steel battens with staggered joints, exactly like a conventional plasterboard ceiling. No new construction, and no added build-up height beyond the 15 mm the board and plaster take up together. The difference lies in the board and the finish – not in the process.
That makes Hz Plus the obvious choice in new-build and refurbishment where the plasterboard ceiling is already specified. The acoustics come with it, with no rethink of the ceiling construction.
Sound measurements for the Hz Plus acoustic panel
INSTALLATION GUIDE
Installation is split between two trades. The project’s carpenter puts the boards up in the sequence already planned for the plasterboard ceiling. The acoustic contractor then takes over the surface.
Timber or steel battens are built up to carry the boards and the mechanical fixing. The cavity behind the boards is best filled with insulation.
The boards are screwed up with screws suited to the substrate and fixed with staggered joints. The acoustic fleece faces downwards and forms the surface.
Joints, edges and screw holes are filled so the surface is ready for plastering. From here the acoustic contractor takes over.
Hz Acoustic Plaster is sprayed onto the whole ceiling in three coats, concealing the perforations. Hz Acoustic Plaster 03 is then sanded completely smooth.
Spotlights, lighting tracks, ventilation and curtain tracks are built directly into the ceiling during installation. Hz Plus is designed to house them discreetly.
See the whole sequence from battens to finished ceiling: fixing the Hz Plus boards and applying Hz Acoustic Plaster 03.
THE DECISIVE FINISH
Hz Acoustic Plaster is the finish that ties Hz Plus together. It is sprayed across the whole ceiling and is acoustically transparent; sound passes freely through to the acoustic board behind. With Hz Acoustic Plaster 03 the surface is sanded at the end to a completely smooth finish.
This is what sets Hz Plus apart from conventional acoustic ceilings: the surface looks like an ordinary ceiling but performs like an acoustic ceiling. Hz Acoustic Plaster can be maintained, repaired and transformed – and it keeps the ceiling looking good for years.
INDICATIVE PRICES
Hz Plus is priced differently from our other systems, because the boards are put up by the carpenter already attached to the project. We supply the materials to site and carry out the plastering.
Prices are indicative and depend on the scope of the project and its specific conditions. All prices are excluding VAT and freight, and do not account for special details. The price of the carpentry work varies between contractors and is an indicative figure only. Contact us for an accurate quote for your project.
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FAQ
Do you have a question that is not answered below?
See our general FAQ or contact us directly.
The construction is the same: boards on battens with staggered joints. The difference: the Hz Plus board is perforated and backed with acoustic fleece, and the ceiling is finished with acoustic plaster instead of paint. Visually the result is a smooth, white plasterboard ceiling. Acoustically it is a different room.
The extra cost is the difference between an ordinary plasterboard and a perforated acoustic board, and between paint and acoustic plaster. The construction and the work sequence are the same, so no extra ceiling is added to the budget. See the indicative prices above.
The boards are fixed by the carpenter attached to the project, as part of the work sequence already planned for the plasterboard ceiling. An Hz Acoustic installer then takes over the ceiling surface and carries out the filling and plastering. The acoustics therefore add no new trade to the programme.
Both systems give the same smooth, seamless ceiling. The difference is in sound absorption, build-up and price. Hz Dual has a thicker absorbent layer and gives higher sound absorption. Hz Plus builds lower, sits in an ordinary plasterboard ceiling on battens and is the cheaper of the two. Where the project sets specific reverberation requirements, Hz Dual is usually the answer. Where a good acoustic ceiling is enough, Hz Plus is the simpler, cheaper route. See indicative prices for both systems under Price.
Hz Acoustic Plaster 03 gives a smooth, sanded surface and the most even absorption across the whole frequency range, including the speech range. Hz Acoustic Plaster 09 gives a textured surface and absorbs more strongly in the low mid-range. The choice should follow the function of the room. Contact us for advice.
Yes. Neither the acoustic boards nor Hz Acoustic Plaster absorb moisture, so the system can be used in damp rooms such as bathrooms, wellness areas and pool areas. The surface should not be exposed to direct water, as this can leave marks in the plaster. This applies to both Hz Acoustic Plaster 03 and 09.
Yes. One of the major advantages of Hz Acoustic Plaster is the option of local repair. Damage can be repaired locally and even transformed completely if a different color or texture is required.
PROJECTS
Hz Plus is used in architect-designed homes, offices and refurbishments that keep the classic plasterboard ceiling as an expression, but not as a sound environment. Here is a selection of our projects.
TECHNICAL DOCUMENTATION
Download the product data sheet and installation guide for Hz Plus 027+ here.
Find an approved Hz Acoustic installer in your area, or contact us directly for advice, sample boxes or a non-binding quote.
