Who triple glazing genuinely suit, and who they do not
- Exposed, north facing and rural elevations that never get sun
- New build and retrofit projects aiming at a low energy standard overall
- Rooms where the wall insulation is already good, so the glass is the weak point
- Homes where the heating is being reduced or replaced with a heat pump
- The weight needs hinges and frames rated for it, and a triple unit in a frame designed for double is how sashes drop
- It is not automatically quieter, an acoustic laminated double unit often beats a standard triple for noise
- If the walls, loft and floors are not insulated, the money almost always does more good elsewhere first
