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Housing - Renovation: Wood Fibre Insulation - Plaster Thickness?

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    • CommentAuthorlngn2
    • CommentTimeJan 16th 2023
     
    We have recently installed 60mm of Steico wood fibre insulation across a large portion of our ongoing renovation project. Instructions and guidance advise use of a levelling coat underneath when walls are uneven which we've done. We took this at face value and have parged with sand/lime across most walls and then boarded. Since then we've realised that although the walls are flat, they're not necessarily vertical which presents challenges around door linings, window reveals etc. With hindsight we should have used the parge coat to make this up, but as neither of us are plasterers we didn't see the problem until it was too late.

    Question - has anyone else had a similar issue and how did you resolve it? Options as I see it are:
    1. Remove the boards and make up. Not going to happen as we can't afford to waste the materials, don't have the time etc.
    2. Live with wonky walls and make up as best we can around verticals (the doors etc).
    3. Use the top-coat plaster to make up - but will the boards cope with the required thickness of plaster hanging off them? Could be an inch or more in some places. The supplier isn't sure, so anecdotal evidence would be much appreciated!

    Thanks
  2.  
    You don't say what type of building it is - although I suspect it is an old (+100 years) and possibly stone?

    Anyway I have a stone built house with walls that start of 80cm thick and by the time you are at 1st floor level the walls are 60cm. Having renovated this house I would go for your option 2.

    What I did was put beading on the door / window framework edge so that it oversailed onto the wall then filled behind the beading at plastering time. Looking face on the wonky-ness is barely noticeable, from the side of course you can see it but with beading and filling painted to match it tends to disappear. I used a decorative beading rather than square PAR timber because this better matched the other woodwork.

    If you have an old property that is all out of square IMO it is best (and easier) not to try to make it straight and square like a flat pack construction kit.
    • CommentAuthorlngn2
    • CommentTimeFeb 7th 2023
     
    Update on this - builder has managed to 'make up' around the doorways and feather-in elsewhere. A huge amount of huffing and moaning but he's done a nice job, though unfortunately won't be finishing it as he was taking the **** on hours (9-3.30 'days' and several trips out for coffee as well as lunch). :sad:
    • CommentAuthorArtiglio
    • CommentTimeFeb 7th 2023
     
    Ingn2, welcome to the world of using more niche products and trades who are inundated with work. My first plasterers were recommended by the baumit rep, didn’t go well and we parted company, started having a go myself but decided i was just too slow, so found some other plasterers willing to give it a go, they did a good job on first visit, next phase was testing to say the least, i ended up as their hospital job and progress slower than i’d managed. So they’ve been nrb’d and i’m doing it again. Takes me an age and lots more filling when it comes to decorating, but there’s no excuse if i’m unhappy with the finish.
    I have now found someone who specialises in baumit/secil products, they are going to quote for the next section if my enthusiasm is diminished.
    • CommentAuthorlngn2
    • CommentTimeFeb 7th 2023
     
    Artiglio - that's the odd part about it - he didn't have much other work ahead. Think that after 9 months here he was beginning to see us as a free meal ticket (it wasn't so bad early on!)
    • CommentAuthorArtiglio
    • CommentTimeFeb 7th 2023
     
    But you’ve found out why he doesn’t have work ahead.

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