DIYnot
Local | Network
   DIYnot > Forums
Local | Network
DIYnot Network Local DIYnot Network Local  
  Forum IndexForum Index     RulesRules    HelpHelp     Join FREERegister Free     About CookiesCookies     SearchSearch     LoginLogin 

why has my floor sunk?

Goto page 1, 2  Next
 
Post new topic   Reply to topic    DIYnot.com Forum Index > Building
Search this topic :: View previous topic :: View next topic  
Author Message
matty0908

from United Kingdom

Joined: 21 Jan 2007
Posts: 23
Location: Bedfordshire,
United Kingdom

PostPosted: Sun May 27, 2007 3:12 pm Reply with quote

Hi,

I had a double storey extension built over a year ago. The floor used for the 1st floor is 18mm or 25mm chipboard (ok, its cr@p), this is nailed to very large joists supported by an RSJ one side and hangers the other. This was all approved by the building regs inspector.

The 1st floor floor is now approx 1/4" lower than when it was built!!!!! There are 1/4" gaps under the architrave. The bathroom tiles not longer touch the tiles bathroom floor by 1/4". The new floor is now 1/4" lower that the old floor!!!!

There are no cracks either upstatirs or downstiars!!!

I'm gonna get the builder back, but any ideas what is going on here??

Cheers,

Matt.
Back to top
 Alert Moderators

If you do not want to see this advert, click here to login or if you are new click here to join free.
FredFlintstone

from United Kingdom

Joined: 19 Jan 2007
Posts: 543
Location: Cheshire,
United Kingdom
Thanked: 1 time

PostPosted: Sun May 27, 2007 3:57 pm Reply with quote

Just a thought, and I doubt it could account for a 1/4" drop, but could it be because the "very large" joists hadn't been dried properly before being installed and as such, have now dried fully and shrunk, hence the lower level of floor?

Regards

Fred
Back to top
 Alert Moderators
Softus

from United Kingdom

Joined: 21 Oct 2004
Posts: 19558
Location: United Kingdom
Thanked: 9 times

PostPosted: Sun May 27, 2007 4:32 pm Reply with quote

Has it sunk by 1/4" all round. i.e. is there a 1/4" gap under the skirting board on all walls, uniformly?
Back to top
 Alert Moderators
^woody^

from United Kingdom

Joined: 03 Sep 2006
Posts: 12977
Location: Birmingham,
United Kingdom
Thanked: 1255 times

PostPosted: Sun May 27, 2007 7:36 pm Reply with quote

1/4 inch is nothing in shrinkage terms after a year. I would say acceptable.

In any case, skirting and architrave should not touch the floor, and neither should wall tiles.

If I was the builder, I would say it is natural shrinkage, and I could not be reasponsible for your heating patterns or lifestyle - which would have affected the humidity in the property.
Back to top
 Alert Moderators
The-brickie

from United Kingdom

Joined: 28 Feb 2007
Posts: 396
Location: Essex,
United Kingdom
Thanked: 10 times

PostPosted: Mon May 28, 2007 9:30 am Reply with quote

^woody^ wrote:


In any case, skirting and architrave should not touch the floor, and neither should wall tiles.



So when a carpenter stands/kneels a bit of cut off skirting to make it follow the floor I should say "your not supposed to let the skirting touch the floor "^woody^" from diynot told me" and I wont look a tit?

7mm is not a massive amount of settlement, cant you (or get the builder) seal it with a 10mm bead of flexible sealant?
Back to top
 Alert Moderators
matty0908

from United Kingdom

Joined: 21 Jan 2007
Posts: 23
Location: Bedfordshire,
United Kingdom

PostPosted: Mon May 28, 2007 10:07 am Reply with quote

Thanks for the responses!!

What is this amount of settlement due to then? as only the 1st storey is affected? Is it the wooden joists? as it it was the foundations, bricks, etc......then i woud have seen cracks all over?

This still leaves me with a really bad squeaky 18mm chipboard floor!!! Ive added extra screws with no joy, i.m gonna rip it up.......whats best to replace with and whats the cost (18m^2)........?

Sure i can add a 10 mm flex sealant, and thats OK in the en-suite as its fully tiled. The sink pedestal is now not in contact with the wall mounted basin due to the shrinkage!!

Also, i prefer my architrave to touch the floor!!!!!
Back to top
 Alert Moderators
Robert too

from United Kingdom

Joined: 05 May 2007
Posts: 129
Location: Berkshire,
United Kingdom

PostPosted: Mon May 28, 2007 10:23 am Reply with quote

Make sure you have doubled joists , bolted togethor , under the partitions and also under any bath .

Check also that there are solid blocking pieces between the joists , depending on the span , 2 rows may be needed ..

As for creaking floor boards , a chippie i was with last week is now instructed , ( by a major house builder ) to lay new boards on a seam of gripfill and then screw them down to stop creaking .

God help anyone having to get them up att a later date
Back to top
 Alert Moderators
Softus

from United Kingdom

Joined: 21 Oct 2004
Posts: 19558
Location: United Kingdom
Thanked: 9 times

PostPosted: Mon May 28, 2007 10:59 am Reply with quote

The-brickie wrote:
So when a carpenter stands/kneels a bit of cut off skirting to make it follow the floor I should say "your not supposed to let the skirting touch the floor "^woody^" from diynot told me" and I wont look a tit?

You're already on the journey to Tittown with that remark. Why not just ask ^woody^ for his reasoning?

Quote:
7mm is not a massive amount of settlement, cant you (or get the builder) seal it with a 10mm bead of flexible sealant?

Here's an example. I could just imply that you're wrong by suggesting that I'd look a tit if I told someone else that 7mm is normal, or I could ask you where you expect 7mm of settlement to occur.

Where do you expect 7mm of settlement to occur?
Back to top
 Alert Moderators
Nige F

from United Kingdom

Joined: 28 Jun 2005
Posts: 16162
Location: United Kingdom
Thanked: 803 times

PostPosted: Mon May 28, 2007 11:39 am Reply with quote

Robert too wrote:

As for creaking floor boards , a chippie i was with last week is now instructed , ( by a major house builder ) to lay new boards on a seam of gripfill and then screw them down to stop creaking .

God help anyone having to get them up att a later date
Why would anyone want to take them up icon_question.gif icon_lol.gif ...there`s an old song about houses being "little boxes made of ticky tacky and they all look just the same" icon_rolleyes.gif icon_lol.gif that`s what we`ve all got .......and the death of the Detatched is written on the wall too..........look around @ the garden grabbers and detatched houses being replaced with double the number of semis.......all because a garden is "brownfield" icon_rolleyes.gif
Back to top
 Alert Moderators
matty0908

from United Kingdom

Joined: 21 Jan 2007
Posts: 23
Location: Bedfordshire,
United Kingdom

PostPosted: Mon May 28, 2007 5:13 pm Reply with quote

some good replys amoungst the "tit" comments!! thansk guys!!!

i have checked the pics i took during the build & all looks in order, ie doubled up and bolted through joists under the stud walls, 2 rows of noggins (at least) across a 4m span.

so what is moving 1/4" in a 2 storey build with no cracks anywhere!!??
Back to top
 Alert Moderators
Robert too

from United Kingdom

Joined: 05 May 2007
Posts: 129
Location: Berkshire,
United Kingdom

PostPosted: Mon May 28, 2007 5:19 pm Reply with quote

out of interest , what size joists are in there ?
Back to top
 Alert Moderators
matty0908

from United Kingdom

Joined: 21 Jan 2007
Posts: 23
Location: Bedfordshire,
United Kingdom

PostPosted: Mon May 28, 2007 5:27 pm Reply with quote

atleast 2" Wide, 8" deep!
Back to top
 Alert Moderators
The-brickie

from United Kingdom

Joined: 28 Feb 2007
Posts: 396
Location: Essex,
United Kingdom
Thanked: 10 times

PostPosted: Mon May 28, 2007 6:20 pm Reply with quote

Softus wrote:


You're already on the journey to Tittown with that remark. Why not just ask ^woody^ for his reasoning?



He didnt say "I think" or "I prefer" he said that they SHOULD NOT TOUCH THE FLOOR, which by my reckoning is a way of saying that what he said was the right way of doing it.

I have never left a gap, nor has any chippie that has ever worked for me, always tight to the floor.

As to the reason why its dropped I couldn't say without seeing it, could be any number of reasons.

125mm x 22mm (or similar) t&g pine floor boards screwed down.
Back to top
 Alert Moderators
Softus

from United Kingdom

Joined: 21 Oct 2004
Posts: 19558
Location: United Kingdom
Thanked: 9 times

PostPosted: Mon May 28, 2007 6:37 pm Reply with quote

That's some pretty nifty back-pedalling you've done there.

Can you do it on this?

Back to top
 Alert Moderators
The-brickie

from United Kingdom

Joined: 28 Feb 2007
Posts: 396
Location: Essex,
United Kingdom
Thanked: 10 times

PostPosted: Mon May 28, 2007 8:09 pm Reply with quote

Back peddling no, disagreeing with what woody said yes.

Not sure what your on about with the bike but yes being that the front wheel is direct drive you can go back and forth.

You are probably from the same school of "I'm right and know everything" that woody went too.

Your question 'Where do you expect 7mm of settlement to occur?'

My answer is I dont know because I havent seen it, we could all give our thoughts on why and we could all be wrong.

Heres a question for you, why is your head stuck so far up your own a**e?
Back to top
 Alert Moderators
Moderator 4
Moderator Comment
Posted: Mon May 28, 2007 8:15 pm    Comment:

cut the abuse out. If there is a disagreement in thinking then discuss it in a civil way, so the subject of the thread does not get lost. DO NOT carry niggles across to other threads and confuse posters who have no idea of what is going on in this one. It
 
Search this topic :: View previous topic :: View next topic  
Post new topic   Reply to topic    DIYnot.com Forum Index > Building All times are GMT
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
Similar Topics   Replies   Views   Posted 
new extension - wooden joist floor has sunk 5 120 Fri Mar 02, 2012 1:53 pm
Ground sunk in last couple of days!! 3 360 Sat Sep 11, 2010 1:44 pm
New floor between old walls 3 60 Sat Feb 11, 2012 6:57 pm
Concrete floor 5 80 Sun Feb 12, 2012 9:33 pm
Supporting floor joists using hanging brackets of steel 13 180 Mon Feb 13, 2012 8:05 pm


 
DIYnot
Find an Expert | Find a Supplier | Search DIYnot.com
Network | Advertising | Newsletter
DIY | DIY How To | @home | DIY Wiki | DIY Forum
By using this site you agree to our Terms of Service / Disclaimer.
Please read our Privacy Policy. Copyright © 2000-2014 DIYnot Limited.