Not when fitted properly. Modern bifolds use comprehensive weather seals and thermally broken profiles, which is exactly why professional installation matters.
Mon–Fri, 8am–5pm
No call-out charge · No deposit on residential work
The UPVC Doctor
Southwest Ltd
Window and door repairs and installations across Bristol, Bath, Keynsham and the surrounding areas.
FENSA no. 42325
Secured by Design
10-year guarantee
Repair services
Installations
Contact
27-29 Baldwin Street,
Bristol, BS1 1LT
Mon–Fri, 8am–5pm
Emergency repairs