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According to Which? Survey of 2155 people in 2018, 31% of people experienced problems after installation.
Here we run through a list of issues that are worth considering prior to installation.

Installation Issues

The most common fault was the windows or doors becoming difficult to open or close (10%). This was followed by them dropping over time so that they don’t fit as well (5%).The glass steamed up with condensation 3%, locks didn’t work 2%, the seal around the windows/doors went 2%.

In case of mild draughts, check to see that the two rows of seals around the frame have not been dislodged. You can push these lightly back into place. Trickle-vents (where fitted) are not designed to be air tight when closed.

Outward opening windows may occasionally cause a problem if something becomes stuck within the frame to prevent the window closing. Make sure the handle is in the fully opened position when opening the window.

Sliders are sometimes fitted with buttons to restrict the opening to 10’ to prevent accidents. Depress the button to allow the window to open fully (check both sides of the window).

If the window doesn’t stay in position then the adjuster screw on the hinge is too loose. Tighten with a screwdriver and presto! Do the opposite if the window movement is too restricted and apply a little oil on the hinges and mechanism.

Mist in the window glass. If this happens then it indicates that moisture has seeped into the insulating barrier of the glass and it will have to be replaced.

Persistent condensation or ‘steamed up’ glass indicates a lack of ventilation in the house or room. Consider air bricks or extractors. Air the room as much as possible or use a dehumidifier.

Occasionally, broken seals (gaskets)can be an issue. They can be replaced if they are they are separate from the frame, rather than built in. You should contact your supplier as soon as you experience any issues with the window glass. We’d recommend contacting the provider as soon as you notice the issue and doing so by calling or visiting the company, following up with it in writing.

Check your warranty. Many doubly glazing companies offer 10 or 20 year ones, but some lifetime. Check exactly what it covers and when until, as some only include hardware fixes within one to five years.

According to Which?, 80% of the people who experienced an issue went directly to the company they bought it from to get it resolved.The majority of the people who did get in touch with the company (75%) a resolution was reached.