Energy Efficiency Guide
Energy efficiency is not just about a headline U-value. Real comfort comes from a combination of glazing choice, thermal breaks, installation quality, and how the whole opening is sealed and finished on site.
Quick checks before you decide
- Review glazing, frame, spacer, and sealing details together.
- Identify the coldest rooms and the elevations most exposed to wind.
- Compare performance claims with the way the opening will actually be installed.
Performance is a full-system decision
Frames, glass, warm-edge spacers, trickle vent choices, and installer detailing all influence the finished result. A strong product can underperform if the survey or installation is loose.
- Double and triple glazing should be chosen based on project conditions, not assumptions.
- Thermal comfort often depends on air tightness as much as glass specification.
- Room orientation and shading matter when balancing winter comfort with summer overheating.
Use the survey to prevent weak points
Thermal bridging, awkward reveals, and inconsistent sealing are usually easier to solve before manufacture than during installation. A detailed survey protects performance and reduces call-backs.
- Confirm reveal depths, cill details, and interface conditions early.
- Ask how installer sealing and finishing are handled around each opening.
- Pair performance upgrades with realistic ventilation planning.
Common questions
Do I always need triple glazing?
No. Some projects benefit greatly from it, but others are better served by a well-specified double-glazed system with strong sealing and the right frame.
Can installation quality really affect efficiency that much?
Yes. Poor sealing, weak interfaces, and rushed finishing can erase a lot of the performance gains promised by the product specification.