In the Vintage grade wood’s natural grain pattern, significant colour variations, and – in addition to natural knots – knots and cracks that are filled with dark filler, as well as round knot patches and oval patches, are allowed for the grade. The colour varies naturally from a light yellowish tone to a reddish colour, and the rustic appearance of the grade evens out the variation.
NOTE! Larch is characterised by its knottiness and significant colour variations. The colour of larch naturally varies from a light yellowish to a reddish colour. The tone does not change evenly over time throughout the floor, but the difference in tone between the different boards can be very strong. Indoor air that is too dry may create hairline or other types of cracks on the surface of the product, but such cracks usually closes with moisture over the time.
Larch is not recommended for installation with underfloor heating, unless a relative humidity between 40–60 RH can be constantly guaranteed. In drier conditions, cracks may appear in the wood material in question. With this being considered, larch floor can also be installed with underfloor heating.