We are a specialist company with 25 years experience of working on low energy homes and buildings and combine technical expertise with outstanding personal service and aftercare.
21° offers a wide range of products and services, including triple-glazed timber & alu-clad windows and doors (everything from inward & outward opening windows, entrance doors, French doors, lift & slide doors to bi-fold doors) and advanced MVHR heat recovery ventilation, specialist airtightness & insulation products, and consultancy and building services.
We also offer a wide range of FREE talks and technical resources on Passivhaus and radical retrofit projects.