❓ What is Part L?

Part L refers to a section of the UK Building Regulations that deals with the conservation of fuel and power in buildings.

It sets the standards for the energy performance of new and existing buildings.

For glazing, this mainly covers thermal efficiency requirements (U-values, g-values, and overall energy performance of windows, doors, and curtain walling).

The goal is to reduce carbon emissions and ensure buildings are energy efficient.

✅ Why it matters for glazing

Products must meet specific U-value targets (a measure of heat loss).

Installations need to comply with Part L 2021 (England), which has stricter standards than before.

Ensures homeowners and businesses benefit from lower energy bills and a more sustainable building.