Moved into my house in past year(60s build) and found that the loft is boarded with insulation (blanket insulation under the boards). I have been thinking that I would like to further insulate the loft and don't really need the boarded area at present. One option would be to pull up all the board and lay new insulation down. The negatives to this are the likelihood I may need the boarded space in the future and also the effort involved pulling up the boards. Anyway I just wondered if there is a bagged type insulation material I could simply lay over the existing boards and if so could anyone make a rec.on where to get OR is this idea a non-starter? I am prepared to accept a trade off between convenience vs insulation quality to a certain degree