About Thermaseal Window Systems Ltd
Why Choose Us?
- Thousands of Customers Served Since 1987
- BFRCA-Rated Energy Efficient Products, including Double- and Triple-Glazed Sealed Units
- Factory-Trained Installers
- Unrivalled Customer Service and Guarantees
- Continuous Product Research and Development
Energy Rated Windows
Our Energy Rated windows are independently tested and verified by the British Fenestration Registration Certification Authority and recognised by the Energy Trust. All windows are available in a variety of energy-efficiency levels from A to C, conforming with or surpassing building regulations in current legislation.