Glasswise

Glasswise are London's leading secondary glazing specialists, established in 2014 and backed by over 30 years of industry expertise. As manufacturers and installers, every unit is built in-house to exact dimensions — no subcontractors, no compromises. Specialising in acoustic and thermal secondary glazing for listed buildings, period properties and conservation areas, Glasswise provide solutions that silence traffic noise, eliminate draughts and cut heating bills without altering a single original window. Rated Excellent 4.8 from 184 reviews. Nationwide installation service available. Best price guaranteed on all like-for-like quotes. Free site survey across London and the UK — call 0203 627 0198 or email [email protected].