Industry News: The Future Homes Standard 2025 & What It Means for Your Windows

Category: Industry News / Regulations
Reading Time: 4 Minutes

The window industry is undergoing its biggest shake-up in decades. With energy prices remaining high and the UK government pushing hard for “Net Zero” carbon emissions, the Future Homes Standard (FHS) is changing how we glaze our homes.

While the full force of the standard applies primarily to new build properties, the “ripple effect” is already changing Building Regulations (Part L) for renovations and replacements in Hampshire. Here is what homeowners need to know in 2025.

1. The Race to 0.8 (U-Values)

The most significant change is the target U-value. The U-value measures heat loss—the lower the number, the better the insulation.

At KJM, we are already ahead of the curve. Our Triple Glazing range comfortably meets these ultra-low U-values, future-proofing your home against further regulation changes.

2. Ventilation is Mandatory (Part F)

Since the 2022 update to Approved Document F, ventilation has become strict. The rule is simple: “You cannot make a building more airtight without ensuring adequate ventilation.”

If you replace windows today, you almost certainly need to install Trickle Vents (small controllable vents in the frame), even if your old windows didn’t have them. This prevents “Sick Building Syndrome”—the buildup of condensation, mould spores, and CO2 in modern, airtight homes.

3. What About Historic Buildings?

This is where the biggest conflict lies: How do we make a Grade II Listed building “Net Zero” without ruining its look?

The industry solution is shifting towards Retrofitting rather than replacement. This means:

• High-Performance Secondary Glazing: Adding a secondary layer to achieve U-values of 1.8 W/m²K or better without touching the historic fabric.
• Vacuum Glazing: Using ultra-thin (6.7mm) glass that fits into historic sashes but offers the performance of triple glazing.