uPVC repairs

Misted double glazing

Fog or droplets trapped between the panes mean the seal has failed. We replace the glass unit and keep your frame.

Book a repair

Typical visit

Two short visits. One to measure, then one to fit once the glass is made. Fitting usually takes under an hour per unit.

AWhat you notice

  • Fog or water droplets between the two panes that won’t wipe off from either side
  • A milky haze, white streaks or tide marks inside the glass
  • It looks worse on cold mornings or when the sun comes round, then partly clears
  • The window looks dirty even straight after you’ve cleaned it

BLikely causes

  • The seal round the edge of the unit has broken down, so damp air gets in between the panes
  • The drying crystals inside the spacer bar are full and can’t soak up any more moisture
  • Water sitting in the bottom of the frame because the drainage is blocked, which attacks the edge seal
  • Age, plus years of heating up and cooling down in direct sun

CHow we fix it

  • We check the frame, beads and drainage first, so we know the fault is the glass and not the frame
  • We measure the unit and have a new one made to size, matching the glass thickness, spacer colour and any obscure pattern or Georgian bars
  • On the day we unclip the beads, lift out the old unit, pack the new one square in the frame and re-bead it
  • Optional upgrades include Low-E glass, argon fill, warm-edge spacers and toughened or laminated safety glass
  • We take the old unit away with us
Before we visit

Worth knowing

Wipe both sides of the glass. If the mist stays, it’s between the panes and the unit needs replacing.

Condensation on the room side of the glass is not a failed unit. It comes from moisture in the room, so keep trickle vents open and use extractor fans.

Condensation on the outside of the glass on a cold morning is normal. It shows the glass is keeping the heat in.

Send a photo of the misted pane with a rough width and height. That’s usually enough for us to give you a price.

Questions

Common questions

Do I need a new window for misted glass?

Almost never. If the frame opens, closes and locks properly, we only replace the glass unit. That costs a fraction of a new window.

Can the moisture just be dried out?

Some firms drill the glass, dry out the unit and plug the holes. That doesn’t repair the broken edge seal or put back the insulating gas, so the mist often returns. We replace the unit instead.

Will the new glass match my other windows?

We match the glass thickness, spacer colour, any obscure pattern and any Georgian bars. If you choose Low-E glass, it can look very slightly different from older clear glass when you compare them side by side.

Other repairs

We also fix

See all repairs
Door locks & mechanismsHandle won’t lift, key won’t turn or the door won’t lock. We repair gearboxes, multipoint locks and cylinders. Handles & hingesWindows that drop, slam or won’t stay open, and handles that are loose or snapped. Hinges and handles replaced. Dropped & misaligned doorsA door that scrapes, catches or needs a shove to lock has usually dropped. We lift it, re-pack it and adjust it. Draughts, leaks & sealsCold air round the edges, whistling in the wind, or water on the cill after rain. We fix gaskets, drainage and sealant.

Free survey · written quote · no obligation

Send a photo, get a price.

A photo of the problem and your postcode on WhatsApp is the quickest way to get a repair booked.

Build your quote Or call07411 496356