Misted double glazing repair
London.
Condensation trapped between the panes is one of the most common things a survey flags, and one of the cheapest to put right. It is usually quoted as a bigger job than it needs to be.
You do not need
new windows.
Condensation between the two panes means the sealed unit has failed. The gap is meant to be sealed and filled with dry air or argon. Once the perimeter seal goes, damp air gets in, and every cold night it condenses inside the glass where you can never wipe it off.
The frame is a separate thing from the glass. A failed unit is a glass problem, not a window problem, so the sealed unit is measured and swapped while the existing frame stays exactly where it is. Replacement window companies rarely lead with that.
Signs a unit has gone are easy to spot: fogging that comes and goes with the weather, a white bloom or streaks inside the glass, or droplets you cannot reach from either side. It works the same on uPVC, aluminium and timber frames, on casements, tilt and turn windows, French doors and conservatory roofs, provided the frame itself is sound.
A misted unit
has stopped insulating.
When the seal fails the gas fill goes with it, so the unit is no longer performing thermally. It costs you on heating as well as looking poor, and the glass often stains permanently on the inside if left for years.
New units can be specified with better glass than the originals: low emissivity coatings, warm edge spacers, toughened or laminated glass where the regulations call for safety glazing, and obscure glass for bathrooms. The frame stays, the performance improves.
It is also the less disruptive option. There is no making good to reveals, no plaster to patch and no decoration to redo, and for a flat or a rented property the work is done in a single short visit once the units are ready.
Sashes, putty
and broken panes.
On timber sash windows the problem is different. The putty or bead fails, water sits in the rebate, and the bottom rail starts to rot from the inside. That needs catching early, because once the joint has gone the repair moves from glazing to joinery.
Cracked or broken panes, failed beads and rattling sashes are all repairs rather than replacements. Where the frames themselves have reached the end of their life, our replacement windows page covers the certified route.
On a period terrace it is worth repairing original sashes where you can. Spliced sills, new cords and draught seals can give old frames decades more life, and in a conservation area the council often prefers it.
Most internal damp
starts outside.
A blocked or split gutter delivers water to one spot on the wall every time it rains. Look under a joint after heavy rain: a dark vertical stain or green growth means that wall is being soaked. Solid brick that stays saturated brings damp through to the inside, people replaster, the damp comes back, and nobody looks at the gutter.
Cast iron gutters fail at the joints rather than along the run, which is a repair, not a reason to swap to plastic on a period elevation. A downpipe discharging onto the ground instead of into a gully puts water straight against the base of the wall. Fascias and soffits behind the gutter are covered on our fascias and soffits page.
A misted unit replaced,
in simple steps.
1. Survey and measure
Each failed unit is checked and measured, with the glass specification noted.
2. Fixed quote
A written price per unit, so you can do the worst ones first if you prefer.
3. Units made
The new sealed units are made to size, usually within a couple of weeks.
4. Fitted in your frames
Old units out, new ones in, beads and seals refitted and the glass cleaned.
Questions we get
asked most.
Get a written
price.
Monday to Saturday 9am to 8pm, Sunday 9am to 3pm. All London boroughs.
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Often needed
alongside this.
Areas we cover.
We take window and gutter repairs across all 32 London boroughs. Most of our work is in west London, in Shepherd's Bush, Hammersmith, Fulham, Kensington, Chiswick and White City, and in south west London, in Putney, Wandsworth and Wimbledon. We also work in south east London, in Greenwich, Blackheath and Lewisham.
If your property is outside these areas, call us anyway. We travel across London and will tell you honestly if a job is too far to price properly.