Questions about flooring prior to tiling

[Aspesim]

I'm Back.....

Yes it’s me... The guy who took six months to do his cloakroom (see previous thread 1st Job...... Six Months Later..... Never Again!!!

Never say, Never again!!!


I’m now doing my main bathroom (3x as big) which is on the first floor. I know I have to strengthen the floor before I can tile on to it but my first couple of questions are:

The joints are approx 370mm apart, how far apart should I put the noggins for extra support?
When I have installed the noggins what type of board should be put down first?
Once the floor is screwed down do I use Ditra Matting next?

(I think that’s it for now as it will take me months to complete this stage)
As usual thanks for all your help.

Regards
Simon.


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[Aspesim]

90 view and no replies?

Should this have been put in the flooring or builiding forum.
or maybe it was the way I wrote it or maybe the questions I asked!!!

[whitebeam]

How thick are your joists depth x width, your spacings between the joists are good are good...

[Aspesim]

Thanks Whitebeam
The depth of the joists are 195mm and the width is about 40mm.

[Aspesim]

After surfing the web I’m now thinking about going down the route of using 6mm Aquapanel Floor Tile Underlay. The Aquapanel technical data sheet suggests using either chipboard or OSB Sterling Board as the substrate (hope I’ve got that right!!

However, on contacting my local timber merchant they suggest using Spruce Plywood instead as it’s been waterproofed.

After researching this product I found this excerpt from a website: With a hydrophobic surface providing temporary protection from moisture, Finnforest Spruce WeatherGuard panels are also breathable so water vapor can flow freely, providing quicker construction and faster drying times for buildings. For contractors working to tight timescales, Finnforest’s Spruce WeatherGuard panels irrespective of inclement weather offer distinct time savings, allowing work to continue onsite unhindered. The result is improved build programming and a long-lasting, high quality finish.

An excellent sheathing solution unlike some alternative panels on the market, dimensionally stable, Finnforest Spruce WeatherGuard panels are not prone to warp or twist, so they are installed with ease and can be used as a safe working surface during roof installation too. Providing a smooth surface under roofing, installation of the final roof covering will be easier as a result

Although It sound better on paper, has anybody used this prior to tiling?

[Gazebo]

Lots of noggins,, 18mm wbp ply..screwed every 150mm. then 6mm hardibacker stuck down with one part flexi addy and screwed into the ply whilst addy is still wet.

dont forget to seal the underside and edges of the ply 1st. leave a couple of mm gap between boards and walls for any expansion.

hope this helps

Gary

[whitebeam]

If you do noggins keep them in a straight line, joists exceeding 2.5m in length should have noggins fixed anyway..usually with 6x2 timber