R7, part of The Residence Collection, is proving increasingly popular in chalk white and in premium foiled finishes.

Sarah Hitchings, sales and marketing director of The Residence Collection, said: “While much of the talk in the industry is about foils, the market for flat white or chalk white as we have branded it, takes account for over 50% of the market.

“The underlying catalyst for this is product differentiation, something that we have in abundance within The Residence Collection. R7 is a flush inside and out window that looks exceptional regardless of finish and at 75mm front to back with a seven chambered platform, it’s also a technical pioneer in the segment for energy efficiency and acoustic performance.”