I'm 26 years old, self employed and cover all internal plastering solutions. Including plasterboarding right through to the skimmed finish. I also have my level2 In Carpentry, so things like stud petitions and all trypes of flooring from laminate to oak floor is no problem! We are fast, clean and very reliable to work with.
Iv been working in the trade sector for 10 years. Iv been plastering since 2010 and carpentry since 2011. Iv worked on many incredible jobs including a Statley home in Cowbridge. Iv never had any bad feed back from my customers which is a plus!
Hey! regarding your question check out the photos on my profile, iv just completed a loft conversion. depending on the size it shouldn't take that long if your living in a average sided house. i done one in a stately home in cowbridge and that took 12 weeks, and there was no access to it before we started!
once the attic is cleared you can start framing the frame of the roof in no time, then it's down the the insulation, boarding and skimming before adding the finishing touches like your wet room ect :)
Regarding your question, most tradesman should be able to measure and cut plasterboard. i do it on a daily basis along with skimmed finished :) cheers