Glazing - Colin's Sash Windows

Published on January 26, 2026 11:23 AM

A U value measures how much heat passes through a building element such as a window, door, or wall. For windows and doors, a lower U value means better insulation and less heat loss. In the UK, U values matter because they affect: How warm your home feels near windows Heating bills and energy efficiency […]

Published on January 22, 2026 1:23 PM

Argon-filled double glazing is the modern standard for energy-efficient windows, replacing ordinary air between glass panes with dense, non-toxic argon gas. By slowing heat transfer, these units achieve superior U-values (typically 1.1 to 1.5), significantly reducing home heating costs for a negligible increase in upfront price. In this guide, we break down how the technology […]

Published on January 21, 2026 12:43 PM

  Double glazing typically lasts 20 to 30 years, but its lifespan depends on the quality of the sealed unit, the frame material, how well it was installed, and exposure to weather. In most cases, double glazing fails because the seal breaks down, not because the glass itself wears out. How long does double glazing […]

Published on September 12, 2025 7:17 PM

When planning a renovation or choosing glazing for a new build, you’ll likely come across two popular options: frosted glass and obscure glass. At first glance, they might look similar. Both allow natural light through while protecting your privacy. But there are key differences that can affect how your home looks, feels, and functions. In […]