Airtightness & pendant lights upstairs

[WWilts]

Cold roof, insulation in first floor ceiling/attic floor

For airtightness, want to minimise penetrating the ceiling

How to make pendant light fittings airtight,
or how to substitute pendants with something more airtight?

[saveasteading]

Drill the holes for the screws, pump in some silicon, screw fit as normal.

At the cable entry pump in silicon around the cable.

You could do ore from above if it is accessible.

 

[dpmiller]

where is the VCL?

[James94]

Cold roof insulation vcl and 50mm service cavity is the way we went for air tightness. No need for anything to penetrate vcl.

Regards  James

[PeterW]

Use offcuts of airtightness tape around the cables and behind the rose but the better option is just use service voids below the VCL/ACL where possible. 

[JohnMo]

30 minutes ago, James94 said:

Cold roof insulation vcl and 50mm service cavity is the way we went for air tightness. No need for anything to penetrate vcl.

Regards  James

+1