New build floor slab

[Jimoz]

Ive always used self compacting concrete for mine with 10mm agg. Started out as Agilia with Lafarge but they are gone now. Even with beam and block or ground bearing slab ive used this.

Just been past an extension where the lads were packing up the pump. They reckon 185 m3 plus VAT. Didnt seem too bad to me I paid 145 5 years ago. They charge 500 for the pump and laying which seems a bargain considering pump hire alone can be over 300. Said they always like to lay once the shell is up and roof is on so doesnt dry out too fast. Ive always preferred doing it once upto dpc level. Easier to link dpm in to walls and nice floor to build on. What do you guys do?

 

[DaveDCB]

Slab in at dpc - 125mm c25 then insulate/wet screed ontop once weathertight.
No need for self compacting as run beam screed over it - but I do see the advantage of just pump or spoon in with bucket self compacting and dapple!

 

[Jimoz]

Slab in at dpc - 125mm c25 then insulate/wet screed ontop once weathertight.
No need for self compacting as run beam screed over it - but I do see the advantage of just pump or spoon in with bucket self compacting and dapple!

Yeh I've always put in at dpc but speaking to those guys did make me think. I like self compacting as I never need a screed on top and easy labour. This one will have uhf as well so there is another dimension to think about. Manifold supported on temp board of ply where a wall is going if slab at dpc. No biggie seen in done enough. Or wait till shell is up and fit ufh and slab once the lid is on. Going to staple the ufh to bottom of slab I know some prefer it in middle but will have 250mm eps insulation. Won't lose much heat out bottom but will be a long reaction time. 125mm slab 250mm eps works guage to 375mm.

 

[DaveDCB]

If your going that route build a ply box for the manifold to protect it

 

[V8Druid]

some'll find this an interesting watch ...... **** up USA style

Reckon they're gonna pressure grout under it and re-screed on top ????

 

[Smiffy]

some'll find this an interesting watch ...... **** up USA style

Reckon they're gonna pressure grout under it and re-screed on top ????

Think persimmons have gone international

 

[Jimoz]

What about this one being underpinned on a site I was on few years ago think I already showed you guys

 

[V8Druid]

What about this one being underpinned on a site I was on few years ago think I already showed you guys

cheaper to knock it down, surely -- underpinning a new build FFS ..... that is some **** up ..... God help whoever bought that

 

[Jimoz]

They should have been made to disclose that when selling but I bet they didnt. Imagine signing up to a mortgage to pay for that.

 

[Jimoz]

Got to 2nd fix before they figured out it needed doing too

 

[V8Druid]

Got to 2nd fix before they figured out it needed doing too

and the building inspector didn't pick up on it before that ???????

 

[Jimoz]

The garage started to fall down then they realised they were building near where they'd put a big drain in at beginning of the job. 6m deep iirc so think it was made up ground

 

[charlie2]

some'll find this an interesting watch ...... **** up USA style

Reckon they're gonna pressure grout under it and re-screed on top ????

surprised more like this does not get publisised. i have seen loads of so called groundworkers just chuck the fill in and race over it with a little pissquick petrol wacker and believe they have compacted it. and fully think they have done a proper job. really takes the piss, a building inspector very rarely ever sees the fill/hardcore just the membrane covering it before the slab gets poured. even if i had the means i would not buy any house built after the 1950s/mid 60s. just chucked up and done as quickly as possible. there are lots of guys i have worked with over the years that did do a decent job. but many more who could not give a flying f#ck. the nhbc pride in the job was a fkn pisstake. the last guy i worked for didnt give a f#ck i had many blow ups with him over the wankers he took on. but he was just driven by getting it done as quickly and as cheaply as possible if he was subbing for someone else. his own work got a lot more attention and was mostly done right. hard to get your head around really as we were all on hourly pay but any subbing jobs were price to him. it really used to piss me off that he saw nothing wrong in working like that. in the end i gave up and stopped working before i was due my pension, used up savings and private pension for five years but felt much more stressfree and relaxed about everything. shot myself in the foot a bit really but felt like a weight had been lifted from me. i know there are plenty of guys that do a decent job, but there are far more that just dont give a s**t. glad i am out of it really and get by ok without all that s**t going on. i allways tried to do a job that i would be happy with myself. might be wrong to some but thats how i saw it. i am sure most of the guys on here would be pretty much the same.

 

[Smiffy]

surprised more like this does not get publisised. i have seen loads of so called groundworkers just chuck the fill in and race over it with a little pissquick petrol wacker and believe they have compacted it. and fully think they have done a proper job. really takes the piss, a building inspector very rarely ever sees the fill/hardcore just the membrane covering it before the slab gets poured. even if i had the means i would not buy any house built after the 1950s/mid 60s. just chucked up and done as quickly as possible. there are lots of guys i have worked with over the years that did do a decent job. but many more who could not give a flying f#ck. the nhbc pride in the job was a fkn pisstake. the last guy i worked for didnt give a f#ck i had many blow ups with him over the wankers he took on. but he was just driven by getting it done as quickly and as cheaply as possible if he was subbing for someone else. his own work got a lot more attention and was mostly done right. hard to get your head around really as we were all on hourly pay but any subbing jobs were price to him. it really used to piss me off that he saw nothing wrong in working like that. in the end i gave up and stopped working before i was due my pension, used up savings and private pension for five years but felt much more stressfree and relaxed about everything. shot myself in the foot a bit really but felt like a weight had been lifted from me. i know there are plenty of guys that do a decent job, but there are far more that just dont give a s**t. glad i am out of it really and get by ok without all that s**t going on. i allways tried to do a job that i would be happy with myself. might be wrong to some but thats how i saw it. i am sure most of the guys on here would be pretty much the same.

I threw a site manager off my site last year as he could not grasp compaction. It was a full depth road reconstruction for a very very heavily used industrial site and he couldn't get it. We had stacks of drawings with engineers notes as well as copies of hauc spec and the design manual for roads and bridges. He couldn't understand how I had come to the conclusion about what machines could be used on what material. I told him to go and read the stacks of paperwork in the office but he would rather argue the point so I told him to do one. Apart from everything else he was just joking to roll up as close as the roller would go the the gully pots. Which bear in mind we where 1m down was not very close and then just leave it. He couldn't grasp that a trench compactor had to be used to get up close.

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[charlie2]

and the building inspector didn't pick up on it before that ???????

no surprise to me at all. loads of paper qualifications not many practical ones.

 

[DaveDCB]

I threw a site manager off my site last year as he could not grasp compaction. It was a full depth road reconstruction for a very very heavily used industrial site and he couldn't get it. We had stacks of drawings with engineers notes as well as copies of hauc spec and the design manual for roads and bridges. He couldn't understand how I had come to the conclusion about what machines could be used on what material. I told him to go and read the stacks of paperwork in the office but he would rather argue the point so I told him to do one. Apart from everything else he was just joking to roll up as close as the roller would go the the gully pots. Which bear in mind we where 1m down was not very close and then just leave it. He couldn't grasp that a trench compactor had to be used to get up close.

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Thought that it was a landdrain run across a farmers field by the sounds of it!