Wooden floating floor


Postby geoff1964 » Fri Aug 03, 2007 5:26 pm

Hi,
I'm in the process of fitting my own conservatory (lean-to) and have an original concrete base which slopes away from the house and is below the level of the new floor. I wish to install a floating wooden floor. I will be laying a damp proof membrane over the existing concrete and inserting insulation slabs between the floor joists.

The span of the joists is 2100mm. Would 47x100mm joists at 400mm centres be sufficient to support the floor?

I intend to run a joist along the dwarf wall and original house wall, which will support the joists with hangers. As this is below the dpc, will I need to fit a barrier between the dwarf wall and the timber?

Is there a need to install cavity closures around the dwarf wall opening for the door, as I intend to line the reveal with Upvc?

Thanks for your great site.

Geoff
geoff1964
Posts: 3
Joined: Fri Aug 03, 2007 5:05 pm

Sponsor

Simply Build It

Postby thedoctor » Fri Aug 03, 2007 7:43 pm

See our project on floor joist spans it has the building regulation tables in there for safe spans on different size timbers
thedoctor
Site Admin
Posts: 2200
Joined: Sat Apr 08, 2006 12:15 pm


Postby geoff1964 » Sat Aug 04, 2007 1:36 pm

Hi Doc,
thanks for that, but would you have any info on the cavity closures and the need for dpc between joists and wall?

Geoff
geoff1964
Posts: 3
Joined: Fri Aug 03, 2007 5:05 pm


Postby thedoctor » Sat Aug 04, 2007 4:26 pm

Anywhere timber needs to be protected from the possibility of rising damp should have a DPC. Its not a bad idea to close a cavity on a dwarf wall even if only for strength, but when it is closed a vertical DPC should be inserted to stop damp travelling from the outer skin to the inner.
thedoctor
Site Admin
Posts: 2200
Joined: Sat Apr 08, 2006 12:15 pm


Postby geoff1964 » Sun Aug 05, 2007 6:54 pm

Cheers Doc

thanks once again.

geoff
geoff1964
Posts: 3
Joined: Fri Aug 03, 2007 5:05 pm


Display posts from previous
Sort by
Order by


 


  • Related Topics

cron