Thanks for the link and the advice re BC. Yes its a timber frame but built on site. I paid builder to put up the frame and then intend to bring in the trades as i need them but insulate and plasterboard ourselves. Builder thought that 100mm insulation and then 35mm insulated plasterboard was...
Hi I am project managing my new extension - frame is up and we are now ready to start insulating and plasterboarding. Plans specify 100mm thick Kingspan TW55 between the joists then 35mm K18 Kingspan insulated plasterboard. How-To books and telly projects only seem to use 12.5mm plasterboard...