What Causes UPVC Windows and Doors to Look Dirty or Discoloured?
UPVC windows and doors are popular across UK homes because they are durable, practical and relatively easy to maintain. Their smooth finish can look bright and clean when properly cared for, but outdoor exposure gradually takes its toll. Over time, white UPVC frames can develop dark marks, green staining, dull patches or a generally weathered appearance.
Discolouration does not necessarily mean...
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