The Loft - who owns it?

The loft may be individually owned in some cases.  However repairs to the loft are a common responsibility. 

Often, the loft space belongs to the flat immediately below it - but as always, check your Title Deeds.  If the loft is not in common ownership, some owners of top floor flats feel able to expand into the roof space. This however requires consent.

Altering your flat - what you can and cannot do

Repairs to the timbers in the roof and other parts that form the structure of the building are almost always common repairs.

Installing loft insulation is defined as being maintenance and if the loft is common property, installation of loft insulation can be seen as a common responsibility.