Hello there all, Can I start by saying a huge thank you for even taking the time to read this - any advice/help is seriously much appreciated! I have recently bought 3 natural fibre carpets (2 sisal and 1 jute) and Duralay System 10 for the underlay. Our flat is Victorian and has wooden floorboards as the subfloor. The first carpet fitter to offer a quote has suggested that the floorboards should have a hardboard overlay prior to double-stick fitting - which almost triples the fitting cost. While I am resigned to accepting this if it is truly necessary I wanted to double check first. I gather from alternative sisal carpet sites that the Duralay can be stapled onto floorboards. My own layman thinking is that a combination of Syccobond F40, staples and blind grippers would be sufficient. ? The rooms are 3.5m x 2.3m, 4.3m x 3.6m and 5.4m x 3.7m so not a commercial scale. On the point of grippers. I gather that blind or short-pin are recommended. Any advice on either or whether these are totally needed. Many thanks. Liam