Just been out looking at new carpet for bedroom.... I'd originally thought I'd get them to fit over the old underlay.... but most of suppliers say you should buy new underlay as old will have flattened etc...
Hmmm.... I've removed old carpet ... Current underlay is somesort of brownish fibre (actually green squared pattern on floorboard side and brown matt fibres on top side...) and about 5+mm thick ... staple thru Its at least 8 years old (we moved in) ... and less than 25 years old (house built)....
Underlay costs seem to be between £2 sqyd (fibre) and £5(foam) sq yd... Do I need new ... Would it help / be advisable to put the new layer (say fibre) of underlay over the old and get them to staple top layer thru bottom to floorboard ... or will this cause trouble... Should I just throw out old underlay and replace with new (I wouldn't want to throw out good stuff and replace with inferior just meet some sales guys quota).. What say you ...? thanks Andrew