Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi all! We have been experiencing an issue on site where threads have been missing the latest postings. The platform host Vanilla are working on this issue. A workaround that has been used by some is to navigate back from 1 to 10+ pages to re-sync the thread and this will then show the latest posts. Thanks, Mike.
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Attic Insulation

  • 30-09-2009 4:00pm
    #1
    walnuts
    Closed Accounts Posts: 10 ✭


    I plan on flooring my attic. The joists are 150mm. I have been advised to use 175mm of rockwool between joists to achieve an A3 rating. If I put in 175 mm and then put in the floorboards 25 mm of the rockwool will be squashed. I’m wondering will this have any implications for the ceilings underneath? Will it cause cracks? Has anyone here every done it? if so how did it work out?


Comments

  • #2
    sinnerboy
    Closed Accounts Posts: 5,433 ✭✭✭sinnerboy


    you can't get an A3 rating based on part of your building alone

    you will need 300mm to meet minimum b regs

    you probably only need to floor the middle 1/3 of the attic ? - if so run 150 x 50 joist across the existing to give you the 300mm

    NB - this will not be strong enough to "live" on - too weak . storage only


Advertisement