Best way to fix wc to chipboard floor

[Hotwire]

I have just had a chipboard floor replaced in the bathroom sadly with more of the same. In a couple of weeks i will be installing a new wc in the mean time the old pan has been put back and secured to this sad flooring material with four screws by the firm doing the job. It doesnt feel the securest of fixing jobs and the pan seems to move when you sit on it. What would be the best way to secure the new wc which only has 2 holes for securing it to floor, ive consdered using toggle bolts which seem to be a good idea.

 

[masona]

They do screws for chipboard, called chipboard screws!

I don't know why the wc pan is moving, is the screw hole too big?

Also are you having floor tiles, if so, best to put exterior plywood down first.

 

[Hotwire]

I think thats what they have used (screws for chipboard). To be fair the cistern isnt on the stabelest backboard but this will be getting rectified tomorrow. The cisterns coupled to the pan with two bolts, it never felt that secure before the floor was renewed. I just dont have much faith in chipboard, hardly renowned for its ability to hold screws securely. Ive thought of using adhesive on the screws when i fit the new pan but the toggle bolt thing is still banging around my head. There are a few doubts i have though about going the toggle bolt route:

1. Once the holes drilled for these bolts theres no way of going back.

2: Theres also there strength to consider, i mean what sort of force will they take before they fall apart.

Any views on it?.

 

[masona]

1. Once the holes drilled for these bolts theres no way of going back.

Depends what type of toggle fixing you use, a bit awkward this way though.

2: Theres also there strength to consider, i mean what sort of force will they take before they fall apart.

Should only be hand tight with a rubber washer protecting the screw head.

I think your best bet is to cut out a small section to the nearest to the centre of the floor joists under the floor pan and renew with exterior plywood for better fixing.

 

[Hotwire]

Cheers for the info masona, Ive decided im going to let the job get finished and take it from there. Ive thought i might install the new wc and cistern and once its screwed into place it could be solid, So no point in worrying about something that might not be. But seeing as youve mentioned ply, i originally asked for the floor to be replaced in 3/4" ply but was told by the building firm this would cotravene the health and safety laws . This was because it wasnt t&g, bullsh*t me thinks especially since the schedule of works says all unsupported joints will have a noggin used. Unfortunately though looking at this chipboard crap floor noggins seem to be a bit scarce .

 

[sidecar_jon]

when i replaced our WC i had no confidence in the fixings either, so i marked the position of the bolts on the floor, drilled out a bog hole (spade bit usualy used for fitting front door locks) and drove a short bit of broomhandle wood with glue in to the hole and used long stainless steel screws into that.

 

[notb665]

What is under the chipboard?

If there are floor joists, I would cut away the chipboard to the nearest joists (halfway into them so that the original floor covers half the joist). Screw down any border areas, obviously.

Then I would put strong wood battens/cross-joists/noggins where the screws for the pan are going to go. Then re-chipboard mostly with the chipboard you just cut out (save the whale and all that). Then put your nice covering on.

 

[Slugbabydotcom]

I use a line of silicone around the base of the toilet

 

[TexMex]

Personally, I'd be inclined to put up with the wobbly seat for a couple of weeks. When you're ready to do the tiling, remove the toilet, fix the ply, tile, then finally fit the toilet properly on top of the tiles (using screws through the tiles, ply AND chipboard). You should also have a gasket between the toilet and the floor. If you haven't, a beed of silicone will stop the nasties getting underneath, and also add to the stability of the toilet.