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Technical Information

Some General Guidance for Fitting

Solid Boards

Boards up to 150mm wide can be secretly fixed down to timber subfloor, either plywood or timber joists Boards over 150mm wide need to be face fixed down, 2 fixings either side of the board will be required at regular intervals down the length of the board. Fixings should be either nails or screws with pellets. We would only recommend boards 140mm and under to be glued down and only with glue recommended by Lawsons

Engineered Boards

These can be either glued or fixed and this applies to wider boards too. Also can be used over underfloor heating but guidelines still need to be followed

The maximum temperature at the point of contact (where the heating meets the underside of the floor) is 27 oC. In order to ensure that this is adhered to, we recommend the use of an underfloor heating system that controls this temperature by way of floor sensors (a probe).

The radiant heating system must not exceed 8 watts/sq.ft; heating capacity and the running water temperature should range between 38-49 oC at the most.

To preserve the integrity of the flooring the room temperature must not vary more than 9 oC between seasons and the humidity must be maintained between 45 and 60% relative humidity throughout the year. A humidifier should be used to maintain relative humidity if necessary.

During the heating period small hairline cracks may appear. These hairline cracks are generally evenly spread and are not cause for concern. They may also appear under rugs and furniture.

Pre-Installation Requirements

Before installing the Flooring radiant heat slabs must be activated to normal living temperatures for a minimum of 21 days. This will ensure that the slab is dry. During this period the temperature should be gradually increased until the maximum recommended temperature is reached. The maximum temperature should be maintained for at least a week.

Before installation reduce the temperature gradually by 5 oC per day. At the time of installation the subfloor temperature should be between 16– 18 oC.

The installation can now be carried out.

After installation the temperature of 16–18 oC should be maintained 3 – 4 days before it is increased gradually over a further 3 – 4 days to the recommended subfloor surface temperature of 24– 27 oC. Despite the season the recommended temperature of 24– 27 oC should be maintained for a further 3 – 4 days. Please keep a daily heating log during the installation period; this may be useful at a later date.

After Care

We only use Bona products on our wooden floors, they have been around a long time and we feel the best in floor coatings. They may bit a bit more expensive than other companies but in our minds the piece of mind is worth it

This is their recommended guide to maintenance, you can also download it from their own website Maintenance Guide for Lacquered Wooden Floors

Preventative Maintenance

Abrasive particles of dirt and grit trafficked on to a wooden floor finished with lacquer can be very damaging and seriously shorten the lifespan of any treatment. The floor’s surface will quickly become dull due to scratches and the wood may be affected by the ingress of moisture and stains. Matting placed at external entrances can be highly effective at prolonging the appearance and life of the floor whilst reducing the frequency of refurbishment. It is important that matting is of a type which allows abrasive particles to drop through it rather than remain on the surface where it can then be tracked on to the sealed floor. Matting should be large enough, ideally, to allow two steps across it, but, as a general recommendation, the mat should be as large as is practical. Periodically matting should be thoroughly cleaned. A dirty mat is ineffective and can act as a ‘reservoir’ of abrasive particles.

How to look after your floor

An effective maintenance programme will keep the floor clean and looking as good as possible. The following information is designed to provide a starting point for such a programme and is appropriate for both commercial and domestic floors. However, all floors are unique and will require individual assessment because the factors affecting them will vary. Changes in traffic levels and seasonal changes will also need to be taken into consideration; for example, additional matting may be required during periods of snow or heavy rain. The frequency of any maintenance should reflect the use of the floor, and should be altered accordingly.

An effective maintenance regime should consist of:

  1. Dry Cleaning: Floors should be cleaned daily using dry cleaning methods, such as vacuum, scissor mop or soft broom. It is important to remove any abrasive particles of grit and dirt which may scratch the floor seal when trafficked under footwear, chair legs, and other items moved across the floor.
  2. Damp Cleaning: Soluble dirt should be removed by cleaning using a spray-buff system or scrubber drier (large floors), or by mop and bucket (small, domestic floors). Diluted Bona Cleaner should be used as a cleaning agent. When using a buffing system the machine should be fitted with a tan pad. A red pad can be used on floors that are very dirty. Coarser pads should be avoided as they may damage the floor seal. All cleaning materials should be replaced periodically to ensure effective maintenance.
  3. Additional Cleaning: Wooden floors in commercial areas which may often become contaminated with grease from food, sweat, or residue from other sources, may require additional cleaning to removethese materials. Cleaning using Bona Remover will remove these non-soluble materials and restore the slip resistance of the floor seal.
  4. Further Protection: Traditionally floors would be treated with wax-based polish to offer additional protection to the floor seal. However once this has occurred the floor cannot receive further coats oflacquer without sanding the floor back to bare wood. An alternative is Bona Freshen Up. This polyurethane maintainer should be applied, by mop or cloth, when the floor seal appears dull due to minor scratches. This should be used following regular cleaning. On a new or recently re-finished floor Bona Freshen Up would be applied when the first signs of wear become visible (i.e. a dulling of the surface).

Newly Finished Floors

A floor coated with any Bona floor finish is usually touch dry within approximately 3 hours. However it continues to cure for approximately one week. The floor may receive light foot traffic 8 hours after the final coat of finish but full heavy use should be avoided for 72 hours. Furniture may be returned to the room after 24 hours but should be fitted with protective pads. The floor should not be covered with any protective sheeting/polythene or rugs/carpets for the first week after finishing. Similarly the use of maintenance products should be avoided for this period.

Oiled floors should be kept saturated. Use a designated floor cleaner such as Bona Oil Cleaner, which will clean and preserve the surface. Do not clean the surface with “all-purpose” cleaners that remove the surfaces’ natural fat. For daily cleaning, use dry cleaning methods such as a vacuum cleaner, a soft broom or a Bona Dusting Pad. To avoid oiled floors becoming dull and dry, apply a coat of Bona Oil Refresher regularly to increase the floor’s resistance to water and dirt. For best results, start the maintenance before the floor is starting to look dry, not after.

  1. Clean the floor using Bona Oil Cleaner and a Bona Pad.
  2. Dampen a Bona Pad with Bona Oil Refresher.
  3. Spray Bona Oil Refresher onto the floor and distribute with the pad. Apply one even coat over the whole floor. Let dry for at least 2 hours.


Periodically it will be necessary to re-finish previously lacquered floors. If the floor has been maintained using wax-based polish or similar, the floor will have to be sanded back to bare wood prior to lacquer application. If just Bona Freshen Up has been used or Bona Cleaner it is possible to apply further coats of finish without heavy sanding. The floor must be cleaned using the Bona Prep System and lightly abraded using the Bona Scrad System prior to applying further coats of finish.

If information is not available regarding the previous maintenance products used on the floor, an adhesion test should be made to determine compatibility. An area should be cleaned by hand, lightly abraded, and a coat of finish applied. After 48 hours the surface should be rubbed with the edge of a milled coin – such as a ten pence piece. Adhesion is satisfactory if the lacquer remains intact.

The Life Cycle of the Floor

Bona offers a range of compatible products, which, if used correctly, will lessen the disruption and expense produced by the full refurbishment of a floor. By frequently assessing the floor’s condition and applying Bona Freshen Up regularly, and adding further coats of finish to the floor before wear has progressed back to bare wood, it should be possible to avoid ever having to sand the floor back to bare wood again.

All the above are only guidelines and all fitters should be aware of them