Home  5  Books  5  GBEzine  5  News  5  HelpDesk  5  Register  5  GreenBuilding.co.uk
Not signed in (Sign In)

Categories



Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

Buy individually or both books together. Delivery is free!


powered by Surfing Waves




Vanilla 1.0.3 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to new Forum Visitors
Join the forum now and benefit from discussions with thousands of other green building fans and discounts on Green Building Press publications: Apply now.




  1.  
    Padstones both in and everything supported ready for beam tomorrow.

    I am getting many conflicting methods from my research, even building inspectors are differing.

    The 1st floor joists will be sitting onto the steel, after removing the top few courses of bricks the original timber wall plate has remained attached to the joists so I am planning to let that sit on the RSJ as it will keep everything in position. My question is with regards to the packing.

    I am all levelled and set with teh pastones and have left around 10mm to allow for any shims on pastones. My two conflicting methods are as follows.

    1 - Top the RSJ with a semi dry strong mortar and use props either end to bed it up to the floor plate, let that harden and then shim the gap between steel and padstone with slate, (or steel?). Then remove all props.

    2 - Use props each end to sit RSJ up against the floor plate and then shim between steel and padstones. Any remaining gaps between along the length would then also need to be shimmed under each joist.

    I am more inclined to use method 1 as it should be a more even and accurate way of leveling any slight undulations of the timber above.

    Can anyone recommend the best route?
    • CommentAuthortony
    • CommentTimeJun 23rd 2014
     
    I would wind the RSJ tight up against the plate then pack that if and where necessary with narrow slate bits pointing with 1:c sand and cement after semidry pack ramming the gap between the RSJ and the padstones and flaunching it.

    Take out props after a couple of days :wink:
    • CommentAuthorCWatters
    • CommentTimeJun 25th 2014
     
    Not sure Building Control allow slate to be used for packing any more between rsj and padstone. Have heard some want steel shims for that.
  2.  
    Thanks Tony. Everything went to plan and there was only a small amount of slate needed on the padstones. Props came out just now and all is solid, no sign of any plaster cracking or tiles moving above, so all looks fine.

    Building Control were happy with the slate used in the previous opening earlier in the year so hopefully fine when they check this week. May use steel next time as it is a bit more precise than finding the exact width of slate each time. Plus I need to keep a few spare slates for the roof!

    Last RSJ question. Where the end is pocketed into the solid stone wall, what is the best way to deal with the it. Will insulation or expanding foam be any help to prevent thermal bridging or is that not really worth worrying about with solid walls. At present there is just a gap either side of the steel, am I best bricking either side for plastering and leaving the rubble/air cavity around the end of it?
    • CommentAuthorjfb
    • CommentTimeJun 25th 2014
     
    definitely insulate around the ends and a little way along the rsj if you can
  3.  
    Expanding foam the best approach? I will be boxing it in so can bring it along a bit too. Is there any risk of condensation on the steel if I do or don't insulate in a certain way?
Add your comments

    Username Password
  • Format comments as
 
   
The Ecobuilding Buzz
Site Map    |   Home    |   View Cart    |   Pressroom   |   Business   |   Links   
Logout    

© Green Building Press