Hi. I have just bought an old house with a 1960s extension. I lifted the carpet and underlay in one of the rooms yesterday, to discover sheets of an odd material nailed to the floorboards. I have attached two photos. It has been severly dented by feet of bed etc, so is obviously a bit pliant, but quite firm to walk on. It has a plastic or foam look to it, but it clearly full of 'fibres'. Can anyone tell me what it might be made of please, and its purpose? Thanks in advance. Graham
thank you very much for this. Given the age of the extension, I was worried that the sheets might contain asbestos. Being for sound-proofing this is unlikely then, presumably? I'm going to lay new underlay and carpet. Because the fibreboard is so dimpled, I plan to remove it first. But can the hollows be filled somehow instead? Thanks again.