Had some work done in my loft recently and just found out when I went in to get the chrissie decs out, that the 'workers' had removed a lot of the existing fibre insulation from between the joists all about the loft (they were installing a new tank and pipes for a shower, also found they havent lagged the new tank or pipes but that's another story!).
When I inspected the insulation, a lot of it looks to have naturally compressed or, had been teased out to appear thicker by the original builder (hmmmm!). So, looks like I need to top up or replace the existing stuff.
So, has anyone 'topped up' their loft insulation ie more insulation roll on top of existing stuff or has it been a case of remove all the old stuff and put new insulation in? If so, did you use a different product? I notice places like B&Q now do things such as insulated timber boards, solid blocks of styrene and the like.