Signs you need this
- Heating bills have crept up year on year
- Rooms feel cold near windows even when the heating is on
- Condensation forms on the inside of the glass in winter
- The double glazing is more than fifteen or twenty years old
- You want to upgrade ahead of an EPC inspection or sale
Heat goes out through windows and doors faster than through any other part of the building envelope. Old double glazing was a big step forward from single glazing in the 1980s, but a 30-year-old sealed unit is doing nowhere near the job of a modern energy-efficient one.
Modern insulating glass uses a low emissivity coating on the inside of one of the panes that reflects warmth back into the room. The cavity between the panes is filled with argon gas, which is denser than air and slows heat transfer. The result is a unit that keeps rooms warmer in winter, helps with overheating in summer, and reduces condensation on the inside of the glass.
Window Energy Ratings
Modern glazing is rated A++ down to E, the same way fridges are. Most replacement units we fit are A or A+ rated. We can quote A++ if you want the absolute best, but the cost difference rarely pays back inside ten years.
Triple glazing
We fit triple glazing too. It is genuinely better for thermal and acoustic performance, but it is heavier and not all existing frames will take the extra weight, so we check the frame first. For a typical Bristol terrace, upgrading from old double glazing to good modern A-rated double will give most of the benefit at half the cost of triple.
Areas we cover
Bristol, the South West and South Wales. We quote in writing, fit promptly, and leave the place clean.
What you get
- A-rated and A+ rated energy efficient sealed units
- Low emissivity coatings to reflect warmth back inside
- Argon-filled cavities for better thermal performance
- Triple glazing where the frame can take it
- Mixed acoustic and thermal units on the same job
- Written quotes with the energy rating spelled out
Common questions
Is triple glazing worth the extra cost?
It is genuinely better, but the payback time is long. For most Bristol terraces, a good A-rated double glazed unit gives most of the benefit at half the cost. We will be straight with you about whether triple makes sense for your house.
Why is there condensation on my new glass?
Condensation on the inside surface of the inside pane is a humidity issue inside the room, not a glass fault. Modern glass is so well insulated that any moist room air now hits a cold pane and gives up its water. Better ventilation usually solves it.
Will new glass really cut my heating bill?
If you are coming from old failed double glazing or single glazing, yes, noticeably. If you are coming from decent modern double glazing the change is smaller. Honest answer.
