PREPPING AND CONCRETING A 100 MM SLAB.. EXTENSION PART 5 

Thanks a million for simplifying, a good hard work, and no messing about, as some do

One of the best explaining the slab from kitchen extension

Nice job lads . Did 7 meters of it yesterday , stuff would drain you . I usually screw a bit of 2x1 either end of the tamp with 1 long screw holding them on .when you get out from the wall you can use the bit of 2x1 as a handle makes it easier to work .

Reminds me of my floor screeding days. My back aches just watching it.

Great video and it was good to see you included the upstands as well.

Great attention to detail...👍

Lovely stuff boys

Good looking concrete!

Little tip,next time put the 25mm upstands in first then use the floor insulation to hold it in place and stop it moving about 👍. Have you ever tried agilia concrete? I love the stuff

Great video, really helpful. Il b doing my kitchen extenion soon and this video has been really helpful.

Great video again lads. We used to build up to DPC on face work then leave the blockwork down the thickness of the slab, or there abouts, then take some polystyrene the thickness of the cavity and place against the back of brickwork. Pour your slab using top of brickwork to screed off with dpm over the brickwork. Next day fold your dpm back on to the slab and remove the polystyrene which has formed your cavity. Place dpc on top of dpm from concrete slab and lay your blocks on it. Later trim off excess dpm on inside of blockwork. Slab is stronger because it is sat on your blockwork which in turn goes down to footings. You won't get any lateral damp on the edge of the slab either because it's completely wrapped with dpm. Cheers 👍

Great videos as always lads 👍🏻

Nice and smooth! spot on lads! I'll get you guys to do mine next time 🤣👍

Great video. Seriously Great 👍

Hey guys great job. That said it's not screening its tamping and sawing. Screed is a sharp saint mix usually 75 mm thick on top

How satisfying does that feel when you get to that final bit of floating off. And I know we all work differently, but I like to get the superstructure up before I bosh the the floor out, apart from giving the concrete protection from the elements, you have somewhere to clean the mixer out at the end of the day, but nice job lads

Nice work fellas!

Great video this well done lads👍

🏘🏘🏘🏘🏘show

Great video of of best around , even talks about cold bridging which is vital . Would you do thiner screed if you use underfloor heating ?

Quality job as ever. Bet your never short of work. Wish all trades took such pride in their projects. Thanks for sharing. All the best Pete.

nooice

great film work alex

Very helpful. Cheers.

Brilliant work lads 👌 im looking at doing an extension soon im putting underfloor heating in though. Would this be fitted before the concrete is poured?

Thought the Visqueen under the insulation should lap into the brickwork as well as the top one, why no A142 mesh ? never do a slab without it .

Good, detailed, explanation - thanks for sharing 👍

Wish I had seen this a couple of years ago. Is there a special name for the big trowel with a curved and square end.

Boys when are you going to do a cement mixing video? Yours always looks proper buttery. Been watching a few of your videos- keep up the good work 👍💪💪 Cheers, Jonesy

Nice video, how come no re-bar?

Great job guys. Relaying my old 1930 kitchen floor next weekend. I was worrying now about how level the sand binding is and will my insulation move a bit. I could see yours moving a bit (if I squinted 😂). I’m guessing under 120mm of concrete it ain’t gonna go anywhere. But love your thoughts. Cheers

I'm starting to think about how to do the floor for a garage/workshop I'm building soon - I want to insulate it but it also needs to take a bit more weight than a domestic floor (cars, machine tools etc). Would a 6" slab with a bit of reinforcing mesh over dpm and 4" of insulation be about right? I've still got to work out what I'm doing with the pit too so I can work under the car!

Are you not require to add reinforcement to your footings and slabs?

Great job as usual, just wondering why you don't have to put in a Raydon sump? Or did you not film this?

Steve, how wide do you normally make the internal leaf blockwork reveal for a 'regular' external doorway when preparing the substructure pls?

Thanks for taking the time and effort in making all these videos. Which is the best hardcore for a concrete floor. Also, does the concrete floor meet the damp course or just below it.

Really enjoyed this video. Can I ask what's the difference between DPM (Damp Proof Membrane) and DPC (Damp Proof Course) and where do they go? Where are they placed? And what's the difference in materials?

Nice job ...but what a balls ache with the continuous DPM & INSULATION....:)

Hi , I know this is a while ago but would you happen to have the heights of all the different layers in the build up ?

Thank you for sharing such an informative video. Just about to have a conservatory built, & the builder has stated for the base - hardcore, sand, then polythene. So far so good. But then he states 100mm concrete on top with 100mm celotex, & finally 0.75 floor screed to finish. Sounds like an extra layer of concrete or screed to me? And no mention of polythene between concrete & celotex. I'd appreciate your thoughts, as I have no experience whatsoever. Many thanks.

Nice video, cheers. It's well shot and edited. One question from a noob: how long does the concrete remain workable from the time you barrow it in?

Can you sand up, visqueen, insulate and concrete in a day for a 13m x 6m area do you think?

No reinforcement mesh?

Don’t you need rebar or mesh?

Got a 3m by 3m extension to do but having trouble with the footings some people say put rebar in in others are saying do it like this I your video how deep does the concrete and the trench dug out have to be?

I've built an extension that is 25 metres by 6.5 metres and put down a 12 inches of concrete. I did it in 4 stages of 6 metres. Cost a bomb. But I thought best to be safe than sorry!??!

Dont forgot to clean the patio door

I have done a 1.5 x 1.5mete extension. I poured in 50mm concrete after 100mm insulation then DPM. Is 50mm thick concrete ok? Please advise. Really appreciate your videos

Poor installation. DPM below the PIR should be lapped to DPC to protect the edges of the insulation from moisture and an insualted perimeter strip should be fitted prior to pouring the concrete to prevent a cold bridge from wall to floor. All in all 4/10.

The most expensive 8’ x 12’ add on ever.

I've watched a few of your videos, I have to say alex is one lazy bollox. He wouldnt take the Barrow or take to give you a break. Always let's steve do the hard work.

Good work lads don't no what it is with concrete it always gets my ticker racing when it turns up

All ya need now is the neighbours cat to walk all over it 😂😂 Top job lads 👍

I have to give it to you pommies you sure do a good job. If that was in Australia i would wack some wooden piers down, treated pine bearers and joists some yellow tongue flooring covered it with cheap carpet and wacked my grandma in there as a bedroom.

A great video, thanks! It's very soothing, probably because I'm not actually having to do all that work. Why do you not have any rebar in the concrete?

Good job boys👍🏻nice too see Alex on the float👌🏼👌🏼👌🏼and you Steve going like a 20 year old when he barrow boys are pumping the gear at you👍🏻👍🏻👍🏻👍🏻👍🏻

Bit of a tip when laying concrete as you know yourself concrete is the same as plastering or jointing brickwork for that matter it is all about timing the finish so I tamper it, screed excess of as you were doing and don't touch it with a float till water starts evaporating of the top as the action of tampering causes water to rise to the top (capillary action) so usually I clean up first to allow water to start evaporating and then either bull float it or screw your trowel to a lath at a angle to act as a long handle and then float it in long strokes, perfect job every time and easier than doing little sweeps with your arm and trowel, but as per usual good tidy work 👍

Live in Africa, and I keep seeing videos like this, and no one uses steel in the concrete. Is there a reason why?

Loved it great video that's one clean building site 👍💪

Good job just l point screening is when you put a screed sharp sand and cement over your concrete

Awesome job lads love watching the videos ☺☺👍👍👍👍

Would you recommend sealing down/taping the edges/joins of the DPM below the insulation so there is no moisture seepage into the insulation, which would reduce its efficiency. Would also suggest taping the edges and joins of the insulation

Proper job 👌👌👌👌👌👌👌

24 ft Timber …?

Another good video well done top team awesome thanks it's nice to see someone who knows what they are doing it gives me inspiration when I have a go🇬🇧🇬🇧🇬🇧🇬🇧

Great job lads

I have no exp. but curious as to why 'no rebar'? in the concrete pour?

Love that smooth finish

Nice one lads!

loved it becoming a big fan

Thanks for sharing

Pour day = Gym day. You earned a few beers after that..

Wow! Smooth as a runway lads😅

Can you put thicker insulation down if needs be..??

Great work lads. Make it look really sexy!

Rather than cut thin slithers, you should have cut the main insulation board to give at least 300mm of infill...never mind, you’ll know next time...!!

Ok an amateur here but can I just ask a silly question. How on earth does that insulation hold up over time? Would the concrete not sink very slightly over time? Surely it would. I told you it was a basic question.

Hi great content thankyou, have you got a video of the stage before this I.E. digging out and filling foundations and building up to dpc?

Really ??? NO REBAR REINFORCEMENT in the concrete floor ??? Really ??? WHY ???

Excellent workmenship, It's grate to see you taking such pride in your work. Thanks for sharing.

Nice job mate, I never thought about trowelling as you go.

Can an insulated pad be built up to ground level or is the starting point always from ground up? I ask I have a granite, 1870's cottage with floors at ground level and want to add a small rear extension, ideally level with the existing internal floors

I think I am sick. Addicted to Bricklaying with Steve and Alex!

Thanks for the video spot on 🤙🏼 just a quick one don’t know wether you will answer back just a wonder i am doing a slab for out house i have got everything sorted ready for the pour in a couple of days i put blinding of sand down i had to tamper by hand will this matter ? And it has got wet because of the heavy rain does this matter thanks in advance

Hello. I noticed the house we purchased the extention attached to the house - the flooring does not have insulation. There is a membrane and 4" concrete on the floor. However is there an option i could insalate the floor before we decide to put either laminate or carpet down? Thanks in advance

We call it scurrying and tamping, great vids guys

Doesn't the DPM act like a pond liner and fill up with water before you finish building the extension?

Lovely bit of screening.

Hard hacker lads. Well done.

What footprints did you have in the morning? Cat? Bird? Or worst of all, size 9?

Frustrating when only one of you know what your doing

Love the channel, the music and how in-depth you go in your videos explaining each steps to us that’s very important! Thanks 👍🏻

Probably a really dumb question but is the second DPM necessary?

why 2 dpm?

No steel mesh.

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How much hardcore and how much sand should be put down in mm 👍

Nicely done guys Screeded or tampered ? I wouldn’t know 🙈 I believed screeded concrete was a polished concrete ? I wonder why such finish needed ? Is the finished floor coming straight on it 🤔 ? Or is it just you wanting it to look perfect ? 😅😎👌🏻👌🏻👌🏻

Good work Steve and Alex pukka🔥 ❤👌. Always nice to see tidy work. Are them belle barrows any good? Great day for it again 🌞 enjoy your evening both of you 👍👊

Made hard work of that should done half screed down middle