Floor preparation - suspended floors

[Rookery]

I would if they ask but they rarely do. Obviously the Hardie is put down as a tiling substrate, not a bounce basher, though it generally does add a bit of stiffness...
Ooooer Missus

 

[Paul R Cox]

The job I've been pricing is natural stone so I'm more concerned. Problem is they have an existing wooden floor down so it makes it more difficult to judge

 

[J Sid]

I would if they ask but they rarely do. Obviously the Hardie is put down as a tiling substrate, not a bounce basher, though it generally does add a bit of stiffness...
Ooooer Missus

sorry, the way i read you other post I thought you we're saying by fixing Hardie it would have eliminated the bounce

 

[J Sid]

The job I've been pricing is natural stone so I'm more concerned. Problem is they have an existing wooden floor down so it makes it more difficult to judge

ok, what size is the floor? Is it ground floor ?

 

[Old Mod]

You mean they have something like an engineered timber floor overlayed which has to come up first?

 

[peteablard]

My house has a suspended floor and after much head scratching I fitted Karndan throughout!! Have converted a few customers to that after explaining the hassle/cost of sorting out deflection

 

[Paul R Cox]

yes

 

[Paul R Cox]

yes to the timber floor question that is!

 

[Old Mod]

All I would do is put a clause in my quote saying..,

After removal of the existing floor, remedial works may be required to strengthen the substrate before installation of new stone floor.
This will be subject to the amount of deflection present, and will be priced on site and will incur an additional cost.

Or something similar, but price for overboarding and inclusion of a decoupler anyway.
It's stone, you will need one regardless.

That's how I'd handle that.

 

[Paul R Cox]

Great, thanks. Sounds reasonable. If using backer and matting would you be inclined to use 6mm backer or thicker?

 

[Paul R Cox]

Is it a floating floor?

Don't believe it's floating but always hard to see when there's an existing covering. If it's floating I wouldn't touch it.

 

[Paul R Cox]

ok, what size is the floor? Is it ground floor ?

Ground floor approx 27m2

 

[J Sid]

Ground floor approx 27m2

probably floating floor then, if so it will need a different method from just over boarding imho without seeing it.

 

[Dumbo]

probably floating floor then, if so it will need a different method from just over boarding imho without seeing it.

How did you work that out based on size

 

[Andy Allen]

I would say 99% of ground floor chipboard substrate I've come across have been floaters..