FREQUENTLY ASKED QUESTIONS

Our Kokowall (Lite) and Noise-Reducer noise barriers have been tested in the Delft-based Dutch testing institute TNO and have a sound insulation of 30dB.
The Kokowall (Lite) noise barriers have been shown to fall within the highest category for sound insulation, Cat. B3-EN1793-2. The BambooWall noise barrier has a sound insulation of 25dB. 

In practice it is important that the right height of noise barrier is chosen. This is different in every situation and depends on various factors such as the distance of the noise barrier from the noise source (road, neighbours) and the distance of the barrier to the place where the sound level has to be insulated the most. The ground level of the various areas also plays a role.
If you wish to receive advice regarding your own particular situation, you can come to us for an obligation-free quote for a noise barrier.

No, sound absorption only relates to the reduction of the reflection of the noise which comes against the barrier back to where it came from. 
A noise barrier with a high absorption  therefore means that of the sound that comes against the barrier less sound is reflected back to the sound source. 
This however says nothing about the degree to which the screen shields against noise  (insulates). In your garden behind the screen only the sound insulation is important for you; this indicates the degree to which the screen actually shields you from any noise. 
The Kokowall noise barriers do however have a good absorption of 7dB on the coconut side thanks to the uneven surface.

For noise barriers placed around equipment or machines that produce noise it is often important that they do have a good absorption, so that the noise does not go bouncing back and forth between the noise barrier and building against which the machine has been placed. 
Kokosystems has various types of noise barriers with an extra high absorption for this use. 
And of course these screens also have a high insulation value of 30dB.

Prices for noise barriers are upon request. When you are interested in a noise barrier you can request a quote by telephone, email or via our website. You will then be sent a detailed quote with a full materials specification. If appropriate we will pass on your request to the nearest dealer in your country.

The noise barriers are all sent on after having been made at our own factory in Poeldijk, the Netherlands.
The delivery time of the noise barriers is: approx. 4 to 5 weeks.

The noise barriers are transported on a pallet by an international haulier. If desired, a portable forklift truck can also be sent with the barriers so that they can be unloaded by machine.

The barrier that has been erected the longest was installed approx. 15 years ago. The barrier is still in perfect condition. Coconut fibre is very tough, comparable with tropical hardwood. Coconut fibres do however fade in colour due to the sun (as does hardwood). This happens, however, very gradually and slowly so you will not find this annoying. What’s more, we wrap a thick layer of coconut around the tubes so that if the outer layer of coconut breaks open due to the weather, a new, fresh layer of coconut appears. In addition, the Kokowall screens have an ideal surface for climbing plants. Once they are overgrown with climbing plants the screens are no longer subject to the influence of the weather, which helps to increase their life. We therefore advise you to allow climbing plants to grow on your Kokowall noise barrier. The frames of the panel are always made of galvanized steel, which gives the frames a very long life as well.

We do not install noise barriers outside the Netherlands. For this, please contact one of our international distributors or a local contractor.  
You can, of course, take care of the installation of the noise barrier yourself. A detailed installation manual can be downloaded here.

Only steel IPE poles can be used for noise barriers, as only these poles (H-shaped) achieve an airtight construction between pole and panel. We do advise, however, casting the poles in concrete for extra sturdiness.

By the noise barriers earth should be added up to the lower edge of the screen. This is to avoid any gaps through which sound can penetrate.

Cat lovers have regularly asked us this. We have never received any complaints or comments regarding this after a noise barrier has been delivered, so we assume that they can withstand cat claws. Should anything happen to your screen, the coconut tubes can be easily exchanged.

As no loose fibres protrude (both sides are clamped within steel frames) it is not tempting for birds and other animals to pull the fibres off the screens. The coconut is wrapped very tightly around the plastic tubes with 14 individual synthetic threads, making it very difficult for animals to pull out bunches of fibres. We have not yet had any bad experiences with this.

For an address near you where a noise barrier, garden screen or privacy screen has been installed, please feel free to contact us or an international dealer by email or telephone.

Yes, for the noise barrier we can supply a door with a cylinder lock in the same system. 
The standard width of a Kokowall Lite, Noise-Reducer or Bamboowall door is 90cm. Maximum width of a door is 120cm. 
For the double noise barrier we can supply a Meranti hardwood door in wooden frame or Aluminium door.

The maximum width of our noise barriers depends upon the project in question. The maximum height of a noise barrier panel is 250cm, but these panels can be stacked up to a screen height of, e.g. 6m!

When you tell us the size of your garden and which poles you wish to use, we can give you a personalised obligation-free quote / layout plan.

For a surcharge we can supply the frames powder-coated in any desired RAL colour. For further information regarding this, please feel free to contact us. 

The colour of the coconut can be kept for longer or the coconut can be made darker again by treating it with garden stain. The garden stain can easily be sprayed onto the coconut using a plant spray. We unfortunately do not stock garden stain amongst our product range, but you can easily buy this from your local timber yard or home improvement centre. 

The bamboo canes will after some time become duller and lighter in colour due to the influence of the weather. After a while they may also split vertically. The screens behind will, however, retain their natural look. If desired, you can treat the screens with a transparent varnish to give the bamboo canes extra protection and to rejuvenate the old colour and gloss.

The noise barriers can be combined with transparent noise barrier panels to give a beautiful result. These panels can be made as option of a galvanized steel frame, the same as the noise barriers, with a laminated & layered PMMA sheet. 

The Kokowall noise barriers are impregnated with the environmentally-friendly fire-resistant Firestop.