Vertical sliding sash windows with authentic aesthetic appeal, providing all the low maintenance and high performance advantages of 21st century PVC-U window design.
Incorporating brush seals around the openings for effective weatherproofing and draught exclusion, Evolve VS sash windows have an A window energy rating (WER) as standard and optional A+, B or C WER ratings can be specified.
Synseal windows enable you to install new windows that blend into their surroundings – city or countryside, commercial or residential. Our heritage vertical sliding sash windows are perfect for conservation or traditional projects,
a classic look with modern advantages.