Mc9

Hi guys. Had loads of hold ups but I'm finally going to start insulating tomorrow starting with the floor and I've got a quick question. It's a tounge and groove floor and I have a 63mm timber frame on top. Question is, do I put my 50mm cellotex in touching the floor or do I leave a 13mm air gap between the floor and the cellotex. What would be most effective?

Thanks for the replys guy's. Hi @PeterW The reason I was asking how resistant these plastics may be to fire is there will be quite a few arcade machines in there so I guess there would be more potential for something going wrong with old electronics like a spark from a dodgy crt etc. I just don't want to do anything daft and all this isn't my area of expertise. No I won't be generating any steam etc I was just wondering if condensation may be more likely to form on plastic than ply or mdf etc once the temperature goes from warm to cold at night. Having said that, I am planning to use a dehumidifier as much as needed in there and will no doubt be asking questions doon about ventilation in the appropriate section on here. Thanks @Ferdinand I will look further into shiplap in more detail as recommended. I shouldn't need to decide for 2 or 3 weeks yet but I'm sure I'll think of other silly questions to ask in the meantime

Can anyone recommend a good place to get plastic shiplap if I decide to use this internally over the top of the insulation? I've had a look and there are a lot of places selling it but I don't know if some are better quality than others or if some are more fire resistant than others and safe around electris etc? Also does anybody know if plastic shiplap would me more or less likely to attract condensation?

Thanks guys I really appreciate the replys, that's given me more to think a out. I never thought about hollow plastic ship lap, that would mean I could get get a couloured ship lap and not worry about painting. Although I do want to keep the shed at 18' wide so I'd need a join as 5m is just over 16'. That leads to another question. Does it not really matter what material you line the inner walls/floor/ceiling regarding insulation benifits?In other words, once I've fully insulated and put foil tape over joints etc is it just a matter of using whatever material I prefer as it won't really help insulation further if it's ply/plasterboard/plastic etc? What about the air gap then. Obviously this is just essentially a shed but I've read so many people saying you must have an air gap then other people say it will be ok so I'm a bit confused. I'm going to keep some arcade machines in there so want it done as well as I can and keep on top od moisture with the help od a good dehumidifier to protect the electronics. I've read you definitively need a decent air gap in the roof particularly but does it really not matter to much if I don't have one in the walls or floor? Even though it's much more expensive I will go for the foil faced PIR but thanks for the link Ferdinand and no I don't have any 3 letter internet domains

Hi, sorry I know these are probably silly questions and pretty basic but I've seen different answers given and I just wanted to get some expert opinions so I know what to do for the best. Thanks

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