What kind of maintenance should you do?

Regular maintenance can be carried out at any time. A finished product treated with paint/preservativees will usually last for 3-5 years on a exposed wall. On a well-screened wall and on the side of the house, it may take 6-7 years or more before a similar treatment is required. Similarly for transparent oil bees (lasur), 1-3 years in a hard place and 5-6 years in a sheltered place.

Untreated windows and doors are fitted with temporary protection. This treatment protects the products for a short construction period. You should therefore brush or paint as soon as possible and no later than 4 months after installation. The exterior should be brushed with a wooded steel brushed so that loose wood and residual bees are removed before new paint / preservative is applied. Required internal maintenance is carried out by following instructions on paint, paint or stain packaging.


Handicap thresholds do not require maintenance. Hardwood thresholds in oak, should be treated 1-2 times a year, with water-repellent oil for treating outdoors (eg, North Sea Tinova Traditiona Premium Wood Oil).


The wood must be allowed to "breathe". Therefore, a diffuser hood should be used / cover coat / paint that allows moisture to escape. Keep in mind that a transparent beech is broken down faster by the sunlight and will require more maintenance. We recommend light colours because this gives a lower heat absorption, which means less movements and lower temperatures in the wood. NB! Do not use paint outside.


Make sure the wood is dry before treatment. If the product is untreated you should first prepare it. We also recommend that you use anti-fungicides before priming. Make sure that joints and ends on the frames and frames are covered well with priming. In these places it draws moisture. If you use paint, apply a minimum of two, preferably 3 coats and not too thick layers. We also recommend that you add a lot of paint / preservative on the lower part and on the lower frame of the window.


Avoid preventing child safety restrictors from staining, which may put them out of order. Also make sure that there is no paint / preservative in the sliding rails. Remove sealant so that it is not painted or stained, it may make it porous.



These products make external maintenance almost unnecessary. Remove dust and dirt with ordinary detergents.



In some cases, residue or a "film" may appear after the labels on the glass itself. Try with soapy water mixed with eg light detergents to remove the glue residue.



Tips & advice on glass



The first cleaning of the glass after installation is completed must aways be carried out with plenty of water. It is important to avoid scratches by dust, sand, mortar etc. Labels are removed by soaking them with water. Remains of labels or other impurities on the surface may be removed with careful use of ceramic cleaners for stove tops.

NB! Read maintenance tips for Bioclean glass here

Surface damage that is attributable to cleaning frees the manufacturer from liability.



• Caused by external stresses such as impact, impact or vibration.

• Caused by changes in the structure of the building due to the movement of the ground or in the building.

• Thermal fracture due to critical temperature differences on the glass surface that may be due to:

      - External blinds are delved down.

      - The interior shield (blinds/roller blind) is very close to the glass with poor airing.

      - Internal shielding (blinds/roller blind) only covers parts of the glass.

      - Foil / labels attached to larger parts of the glass surface.

      - Random objects placed against the glass surface (insulation, etc.).

      - Heat radiators that provide radiant heat must be at least 30 cm away from the glass. For tempered glass apply 15 cm.

      - Heating elements that do not emit radiation (throughput furnaces) can normally be placed 15 cm apart from glass.

Damage caused by the above items is not warranted. Read more about measures you can take against thermal fractures here.



Drainage from concrete and wall, as well as from chemicals containing air, can etch the glass surface so that it becomes matt. This type of damage can be polished with appropriate means under certain conditions.
Welding splashes and sparks from angle grinders burn into the glass and damage the glass surface. This type of damage to the glass cannot be removed without compromising the optical properties of the glass.
Glass is a natural product consisting of sand, soda and lime. Although the raw materials are carefully cleaned, it cannot be avoided that in some cases there may be small dots in the glass.


Brewster stripes

Brewster stripes appear as irregular, rainbow-colored inscriptions in isolation routes. They are difficult to spot and are generally seen in reflection only. It is characteristic that the strips "wander" when pushing the route easily.


Colour Shades

Clear glass has a barely visible tint. The colour tones are more clearly visible in coloured glass than in clear glass. It is more prominent the thicker the glass is. Coated glass, for example, for sun protection and for energy saving, has different colour and reflection depending on the thickness of the glass, product type, manufacturer and production time.

Optical phenomena as mentioned above are usually no cause of complaint.


Newton's ring

Newton's rings appear like rainbow-colored rings in the middle of the isolerglas route. Newton's rings are caused by a manufacturing error.



This is defined in a Norwegian and a European Standard NS EN 1096-1. In the standard it stands; "Inspection shall take place at least 3 m in normal daylight". The definition of common daylight is: "Daylight lighting is a uniform, cloudy sky without direct sunlight."

Impurities, shields and other faults that are not clearly visible in normal daylight lighting from this distance do not provide a legitimate basis for complaint and compensation. Uncleanness, shields and other errors that are visible only in a particular season, in a particular light or at a certain time of the day, will not be accepted as a complaint.



The air gap spaces separating the glass from each other in an insulation route are hermetically sealed. Varying air pressure and temperature as well as altitude may affect the insulation or bend of the insulation. Too big differences in air pressure outside of the isolation route and in its air gap can cause leakage in edge sealing or that the glass bursts. When mounting insulation routes to mountains (over 800 meters), contact for dimensioning. Please note that small routes are most exposed. Kitts Probes can not be delivered on products that must be pressurized. 



This type of glass must be labelled. The same applies to frame/frame. The products are certified and special rules apply to the assembly and use of this type of glass.