Traditional lye treatment should only be performed on solid flooring of coniferous wood, for example. douglas, lighthouse and fir. Treatment on lamellae is discouraged and should be done at the factory.

Hardwood treatment of hardwood should be done with deciduous woodwood, which is usually not based on lye but on acidic agents, e.g. oxalic acid, and has a bleaching effect. They are not dealt with in this guide and reference is made to the supplier's instructions.

Softwood flooring can be purchased ready-mixed or made according to the recipe in WOOD 63 Wooden floors.

Lud aims to open the pores of the wood and reduce the tendency of the wood to yellow. The treatment gives the wood a characteristic white-gray color. Lying can never stand alone, but must be protected by a soap treatment or possibly an oil treatment

Lud is a pretreatment

Hardwood flooring has the primary purpose of reducing the tendency to yellowing.

The treatment cannot stand alone, and must always be supplemented with either a soap treatment, an oil treatment or an oil foundation with subsequent soap treatment.


Lying can be done on new untreated boards. If the floor does not appear completely flat, it should be sanded. On older floors, the boards must be sanded to clean wood before the lye treatment can be carried out, see TRÆfakta 10 Wooden floors - Grinding

The floor must appear completely flat and well-groomed to avoid difficulties with handling and maintenance. The wood moisture should be between 8 and 10% and in any case must be below 13-14% to minimize the risk of the wood rejecting the treatment.

The building must be closed, dry, heated and free of building moisture. The room temperature should be between 18 and 25 ° C. The humidity must be between 30 and 65% RH, but best approx. 50%.

Protective gear

Since lye is highly alkaline and can cause corrosion, the Labor Inspection Regulations should be followed. In particular, eyes and skin should be protected with e.g. goggles and suitable rubber gloves

Application of lye

Shake the can with ready-mixed lye so that the pigments are evenly distributed. Pour the lint into a plastic bucket and stir regularly throughout the treatment.

Apply the lint with a lint swab, brush or roller, and apply wet in wet to avoid streaks and shadows in the treatment.

Apply abundant lye and pull off excess lye in the longitudinal direction of the boards. It is most easily done with a whip swab for every half meter application, so that the lye treatment appears smooth and uniform. Use shoe covers so that marks and dirt are not deposited in the lye layer during application.

After approx. 6 hours drying time at approx. 20 ° C and 50% RH (relative humidity), the floor is easily abraded with a grain 180 grit grinder and hand grinded to the required extent in corners and edges. Abrasive dust is removed with a vacuum cleaner

soap Treatment

The treatment can be done with pre-mixed soap, either natural or white pigmented, depending on which end result is desired. The soap treatment can also be carried out with soap scraps, possibly in combination with e.g. bibs to make the floor more whitish, see WOOD 63 Wooden floors

Shake the can with the pre-mixed soap so that the contents of the soap mixture are completely distributed without precipitation in the can.

Use the soap and water soap mixture as stated in the supplier's instructions and wash the floor at least twice to saturate the surface.

Wash the boards in the longitudinal direction with a lint swab, floor cloth or mop. Also wipe lengthwise with a floor cloth or mop.

Other soap treatment can be done 20-30 minutes after the first treatment.

After 3-4 hours, the floor is polished with a green polishing pad to give the floor a more uniform appearance.

Experience shows that the treatment can be repeated to obtain a better saturation before use.

Seal with oil

Soil treatment, which is performed where the floor will be moisture-loaded, can be advantageously primed (sealed) with an oil treatment before finishing with soap.

oil Treatment

An oil treatment can be used instead of soap to seal the floor surface against dirt. A curing oil is used, either natural or white pigmented, depending on which end result is desired.

When using white pigmented oil on especially older, ground floors, a uniform result cannot always be obtained, and it is recommended that the supplier be consulted.


After lye treatment and drying, see laceration, apply two layers of flooring wet in wet. Other oil treatment can usually be done after approx. 30 minutes. The oil is applied with short-haired roller, applicator or polisher with white pad, so that the floor saturates. Any excess oil is dried off.

After a maximum of 30 minutes and always before the oil dries on the surface, the floor is polished with a polisher attached to cotton cloth. Then the oil treatment should harden for 24-36 hours. The floor must not be walked during this period.

End Treatment

The floor is easily sanded with a polisher and green polishing pad. The floor is vacuumed to remove all abrasive dust.

Apply at least one layer of oil with polisher applied to cotton cloth until the floor is saturated with oil. After approx. 30 minutes, the floor is polished with a polisher attached to cotton cloth. Avoid excess oil drying on the surface. If the floor is not completely saturated, repeat the treatment.

The oil should dry for 24-36 hours and should only be used after approx. 72 hours to harden and achieve maximum durability.

Cleaning and maintenance

Lime-treated floors, which are soap-treated, must be maintained with soap-and-water at least once a week at normal use (housing, etc.).

For larger loads, e.g. at entrance areas, in shops, assembly rooms etc. the floor should usually be washed at least twice a week and always as needed.

Lime and oil treated floors are maintained with care oil. For normal residential purposes once a month, if floors are vacuumed and wiped with a damp floor cloth weekly or more often as needed.

With heavily loaded liquor / oil treated floors, it may be necessary to maintain with care oil weekly in combination with daily cleaning, so that dirt and particles that wear the surface are removed from the floor.