part l

  1. O

    U-value for new external wall on a new small extension

    Hi, I want a small extension to accommodate a 2x1m bathroom (internal area) and a 1.5x1m service area. I'd like an external brickwork, in terms of appearance, to blend with the rest of the house (cavity wall from 1970). What is the U-value requirement for the new external walls, please? Am I...
  2. A

    Part L regs and extensions off of existing property?

    Searched a lot on the internet, but the regs don't see overly detailed in explaining the answers to my queries. I have a 1960s built 3 bed house which is on a generous corner plot, the hillside is wrapped around the house making the front a two storey home and the back more like a single storey...
  3. V

    Solid Wall insulation internal - without buildings regs

    I know how stupid this is, but naively we installed internal wall insulation in several rooms (external walls). Solid wall house. Had no idea there were regs for this, just thought that adding insulation was a "good thing to do" (yes, ... I know better now). We used Kingspan materials and it...
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