Wooden windows in Hertfordshire — the problems we get called about
Period wooden windows are essential to a Hertfordshire property's character — and the county has a lot of them. But ageing frames lead to draughts, peeling paint, poor insulation, and rising heating bills. The older the house, the harder those problems are to ignore.
We specialise in sympathetic restoration — traditional joinery alongside discrete modern improvements that preserve the original window whilst making the rooms easier to live in. Twenty-five years of work on sash and casement frames, mostly across Hertfordshire and the surrounding Home Counties.
What we see most often in Hertfordshire houses:
- Rotten window frames where rain has worked its way into the cill or the bottom of the stiles.
- Heat loss through single glazing — a typical U-value around 5.0 W/m²K, against a modern wall at ~0.3.
- Persistent draughts and rattling from worn parting beads and seals.
- External noise from the M25, the A1(M), the railway lines through the county.
- Condensation buildup on cold internal glass, leading to staining and decay around the cill.
Restoring wooden windows in Hertfordshire
When sash windows start showing the signs — drafts, rot, outdated glazing — it's time to act before the damage compounds. We focus on sash and casement repairs and upgrades, blending traditional workmanship with modern energy-efficient materials.
Bay window repair & restoration
Bay windows are prone to sagging frames, cracked panes, and condensation on single glazing. We repair the rot, reseal the joints to stop leaks, and reinforce the structural integrity of the frame. Where the brief calls for it, we retrofit double glazing into the existing sashes.
Draught-proofing wooden windows and doors
Brush seals and weatherstripping fitted into the stiles, meeting rails, and cills. Done well, the rattle goes and the heat stops leaving through the gaps around the sash.
Rotten window frame repair
We splice-repair decayed timber: cut out the rot back to sound wood, scarf in matched joinery, treat the surrounding timber, prime and paint. The window is structurally the same window, with a new section spliced in where the old one had failed.
Double-glazing retrofit for Hertfordshire sash windows
Many Hertfordshire homes with traditional sash windows still run on single glazing. Heating bills creep up every year; comfort goes the other way. A double-glazing retrofit drops the U-value at the glass from ~5.0 to ~0.7 W/m²K — triple-glazed thermal performance inside an 8 mm vacuum-insulated unit, with the original sashes left in place.
Vacuum double glazing vs single glazing
Vacuum-insulated glass is a slimline upgrade over traditional single glazing. Two panes separated by a hard vacuum — drastically less heat loss, meaningful reduction in external noise, no visible change from inside or out. Single glazing provides limited insulation and shows up as draughts, condensation, and rising energy costs.
Our service area in Hertfordshire
We cover the whole county. The towns where we work most often:
- Watford
- St Albans
- Hemel Hempstead
- Stevenage
- Hertford
- Harpenden
- Berkhamsted
- Hitchin
- Bishop's Stortford
- Ware
Outside Hertfordshire we cover the neighbouring counties too — Buckinghamshire, Berkshire, Bedfordshire, Cambridgeshire, Essex, Surrey — and the London catchments to the south.
Frequently asked questions
Will reglazing reduce condensation on my windows?
Yes. Reglazing with vacuum or double glazing significantly reduces condensation by improving insulation — the interior glass stays warmer, so moisture in the room air doesn't condense onto the pane.
What hardware options do you offer — locks, handles, pulleys?
Traditional sash locks, handles, and pulleys in brass, chrome, antique, and bronze finishes. We match to the original ironmongery of the house, or to a brief you bring to the survey.
What's the cost of upgrading existing windows with double glazing?
Retrofit pricing depends on window size, condition, and the glass specification. As a guide, the full package — refurbishment plus the retrofit — runs from £1,200 per window, typically £1,200–£1,700; the survey produces an itemised written quote for your specific property.