Window U value regulations for replacements in 2026
Replacing windows in 2026? The legal limit is a maximum U-value, not a target. Here is what Part L asks of a replacement, where the new-build rules differ and when to go further.
Draughty Windows: Find the Leak, Choose the Fix
Most cold air arrives past the frame, not through the glass. How to locate the real leak in a timber window, what each fix costs you in effort, and when to stop spending.
Dutch Windows: What They Are and Why They Look Like That
Why are Dutch windows so tall, so thick, and so uncurtained? A timber manufacturer explains the 17th-century logic, the leaning-house myth, and how the design meets UK rules.