Tony,

You mentioned your windows were Alu-Clad timber, I wondered if yours had insulation between the Alu Cladding and the timber frame. The model we are looking at doesn't and another manufacture suggested this was bad practice as you get condensation form on the inside of the Alu cladding which will cause problems long term but no idea if this was just sales talk?

Appreciate anyone else's experience of Alu Clad Timber windows with no insulation?