Doing house renovation and will have External Insulation and new Windows and in particular two curved bay window sections at the front. uPVC are our preference on cost as Aluclad are very expensive and not within our budget. The Aluclad supplier has stated that he will not provide a quote for uPVC as they will not work with the External Insulation as below he states reason for Aluclad use...
The new Alu-Sills are definitely NOT just an aesthetic cover. They are an integral part of the building structure. They are they to ensure that your building does not suffer water ingress at the bottom of the window. Such ingress could cause a failure of the external insulation system. The connection between Window and sill is a critical one, even more so in the case with faceted junctions for your corner windows.
We always prefer to fit both window and sill, as this insures that we have control and responsibility of this junction.
Any advice please from anyone with expertise in this area..........
The new Alu-Sills are definitely NOT just an aesthetic cover. They are an integral part of the building structure. They are they to ensure that your building does not suffer water ingress at the bottom of the window. Such ingress could cause a failure of the external insulation system. The connection between Window and sill is a critical one, even more so in the case with faceted junctions for your corner windows.
We always prefer to fit both window and sill, as this insures that we have control and responsibility of this junction.
Any advice please from anyone with expertise in this area..........