As engineered flooring requires no time to acclimatize, it can be used straight out of the pack. It also has the benefit of being easy to fit, particularly when floated over underlay. Whilst engineered boards are extremely stable, we still recommend an expansion gap of 10-15mm. If fitting to screed, please ensure sufficient drying time has been allowed. In certain environments a damp proofer may be required, such as Lecol's PU280 Primer.