Kitchen floor

[DavieA]

:loloint taken

 

[Scott]

It its a conventional floor it will be joists suspended over a void. It its joist sat on a concrete base with insulation between then its still floating. I have seen them done in conservatories with mixed results, some fail and some dont. The general concesnus though is to not tile them.

It its a suspended floor sometime there are brick piers under the joist to stop the deflection that can be packed out to stop it, or additional ones added in.

 

[DavieA]

Hi all, went to have a look at the 25m2 kitchen floor and the floor is not a floating floor and is of standard construction with chipboard nailed into joists. There is some squeeking and movement in areas but not a lot and the floor is made up of 3 rooms knocked through into one.

Travertine or slate is what the customer is looking to use and UFH matting.

My thoughts are to first,

Screw chipboard in areas of squeeking,
Lay 15mm Ply accross whole floor screwed at 300 centers to elimenate vertical movement and create one solid floor instaed of 3,
Bed UFH matting to PLy with a thin bed of SPF adhesive(keraflex most likley)and allow to go off,
Pour Mapei renovation screed SLC over mat to protect and give a good suface to tile on,

Not to sure wheither its recomended to put a Decoupler down ontop of SLC or is it over kill and will mapei SLC bond well to ply or is primer required?

Then tile as normal.

Correct steps?

 

[Mike]

be careful screwing the chipboard down if you don't know whats under there. there may be a notch out of the joist for pipes or cables causing the 'squeek' and you may hit them by screwing in that area. i know cos i've done it a few times :mad2:

 

[nybor62]

tiled some floating floors years ago , under instruction from the firm i worked for , we wire meshed all the floors first , and to be honest never got a call back

 

[DavieA]

The joiner will be doing the screwing and laying the ply

 

[Daz]

Given the choice, I would want the WHOLE floor screwed down and then overboarded with 18mm ply (15mm doesn't exist; it is actually 12mm). I would then fix the UFH and skim over the wires with a CHEAP RAPID SET FLEXIBLE adhesive before applying the slc.

As you are fixing stone, I think you will be mad not to use a decoupler.

Good luck and we look forward to the pics!

Daz

 

[DavieA]

Cheers Daz defo price in Decoupler, I thought it be a good idea but warned the customer its not cheap though but why skim over the wires with a CHEAP RAPID SET FLEXIBLE adhesive before applying the slc ?

 

[SandyFloor]

Cheers Daz defo price in Decoupler, I thought it be a good idea but warned the customer its not cheap though but why skim over the wires with a CHEAP RAPID SET FLEXIBLE adhesive before applying the slc ?

The wires have a tendency to float even with loads of tape or fixings and parts will be sticking above the slc when set. The addy holds it down better due to having a thicker consistency.

I'm thinking if there's a joiner on the job it would be better to uplift as much of the old chipboard as possible, reinforce the joists and replace with ply which would keep the floor level down.

 

[DavieA]

Ah right , the ufh is the type that is attached to the mesh and i usually just lay a thin bed of addy and roll out the mat bedding it into the adhesive so it shouldnt be able to move but ive heard of the wire that comes in a roll doing what you have discribed so that makes sense.

Suggested to joiner and customer lifting chipboard but neither wants to do so due to the kitchen having just be installed ontop of it:mad2:

 

[Gazzer]

Cheers Daz defo price in Decoupler, I thought it be a good idea but warned the customer its not cheap though but why skim over the wires with a CHEAP RAPID SET FLEXIBLE adhesive before applying the slc ?

But why risk using a cheap adhesive. Penny pinching IMO

 

[Rich]

I was just about to ask if there was any chance of removing the floor, then I read that the kitchen has been fitted. Why do people do that?

I havnt tiled onto a floating floor, I have ripped a couple out and started from scratch but I wouldnt want to risk it. Take in the advice from the guys above and try to follow it to the letter :smilewinkgrin:.

 

[Scott]

15mm ply does exist! !I use it a lot, its just not that popular. If you have a timber merchant that you use and you use enough of it they will get it for you.

 

[DavieA]

Advice giving is defo followed, that way I cant blame myself:lol:.

Ive ony come across 1 floating floor and I told him the risks and why I was not willing to tile it so they went down a diferent route. If its floating Im not touching it.

 

[kilty55]

hi davie,not a bad offer on at ctd at present on decoupler might help you out on this job