I Tiled On Tile This Week......

[Stewart]

Ban me now... I'm so ashamed......:ban:
Looked at this job a few weeks ago after it was installed by a national bathroom company that advertises on tv. Floor was made up 22mm chipboard, They then added 18mm chipboard (the small untreated boards you use in the attic) to make up fall for wet room. Heat mat installed and no tanking. Water pouring through after 2 weeks and its the only bathroom in a forth floor flat. Amazingly, the water was pouring through around the drain.
View attachment 28138 View attachment 28139 View attachment 28140 View attachment 28141
as you can see, they have cut two huge holes in the joist and this has to be replaced. They butchered the floor and just used 3x2 to support the chipboard. They refunded the full cost of the install and an additional amount to have it re-fitted. I had to do a temporary repair until the full re-fit can be done in August as its the only shower in the place for three adults.

 

[Stewart]

This is the first row of pictures....not sure why they didn't work.

 

[Ian]

If it doesn't leak and it's only temporary then its all good! You've saved lots of residents on the floors underneath getting unwanted showers!

 

[Brinkley]

huge hole through the joist is that allowed .

 

[user123]

It looks good, shame it's only temporary...

 

[Del W]

dont know much about building regs for joists but i think that size hole would make it as much use as a chocolate fireguard.

 

[hillhead]

Not allowed IMO, a smaller one would have been a lot safer.
Good strength needed above.

 

[widler]

the holes are fine,in these type of floor joists they are pre cut in some cases.
the joist are only made out of chipboard and softwood H sections.meant to be as strong as steel.

 

[DHTiling]

TGI joists have these service holes along their length , you simply just nock them out


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[Gall.B]

Thats the problem with these T.V. advertised company they have one installer doing all the jobs he's not qualified to do. Then charge you top dollar for it . Good they gave a full refund plus extra though.

 

[Dave Ramsden]

Utterly disgraceful! Clearly these BIG, WELL KNOWN bathrooms companies down vet there fitters properly!!
Always use local tradesmen!!

 

[Rob Z]

The odd thing about the manufactured I-joists is that everything that is acceptable with standard 2X framing lumber is not allowed with I-Joists, and vice versa.

For all the I joists with which I have worked, holes can be of any size (vertically and horizontally), as long as they don't intrude upon the chord on the top and bottom of the "I". THe holes can be placed anywhere along the length of the I joist, except the very ends close to the bearing points. Thris distance varies a bit from series to series.

When in doubt, before I cut or drill, I contact the manufacturer and they are happy to send out a PDF by email with the specs for the particular series of joists that are in the house where we are working.

 

[Aston]

I joists have huge structural capacities. usa and canada have been using these for years. now the uk is big into timber framed housing with external insulation and thin coat renders, you'll see a lot more of them.