A fantastic UK Handfinished Natural Oak Rustic Brushed and Oiled engineered wood flooring. Each individual board is 260mm (26cm), the overall thickness of the planks is 18mm (1.8cm), including a top 6mm layer of an oak veneer. The 6mm wear layer enables you to sand down and refinish the surface up to 6 times. This shouldnƒ??t be necessary for the first 10-15 years in most domestic environments. Engineered flooring, such as this, is highly resilient to temperature and humidity changes meaning they can be laid in most rooms in the home, including conservatories, with the only exception being the bathroom. Due to the stability of our engineered flooring products laying the flooring in rooms heated with water based underfloor heating is not a problem. The surface temperature cannot exceed 28?øc. The warranty is not applicable to electrical based underfloor heating. Each board is manufactured with a tongue and groove profile, so each board can simply be glued together. The grade of this oak is rustic mixed, meaning it will contain some knots as is typical with oak products. We are very pleased to offer a 25-year warranty, so you can be safe in the peace of mind this product will last. The product cannot be damp cleaned for 14 days, so to not affect the two coats of hardwax oil. This engineered oak would usually be fitted as a floating floor installation, where an underlay is laid onto the subfloor beneath the flooring, this gives added protection from any damp and will act as a sound barrier and insulator.