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

THIS WEEK WE DO THE SLAB ON OUR AWKWARD EXTENSION JOB.
WE COVER EVERY STAGE FROM LIFTING THE FLAGS TO TROWELING UP THE CONCRETE INCLUDING HARDCORE, SAND BLINDING, 1ST VISQUEEN LAYER, INSULATION, 2ND AND MAIN VISQUEEN LAYER . WE ALSO SHOW BARROWING THE CONCRETE IN , LEVELLING IT , TAMPING IT AND FINALLY PUTTING A TROWEL FINISH ONTO IT ....ENJOY
#CONCRETEFLOOR #PREPERATION #BRICKLAYING #FATHERANDSON
Business only contact : e mail .. [e-mail]
Instagram .. steve_and_alex_bricklaying

[@boris100ish]

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.

[@SteveAndAlexBuild]

bamboo bushcraft Cheers Pete , half the battle is caring about your work and enjoying it helps too . This was a tough job from start to finish but very rewarding 🧱👍🏼

[@nareshmaharaj8755]

One of the best explaining the slab from kitchen extension

[@SteveAndAlexBuild]

😁🧱👍🏽

[@abderelhoudaigui6283]

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

[@SteveAndAlexBuild]

Abder Elhoudaigui . Thanks pal , keep it simple and things will go smoother Thanks for watching and commenting pal 👌🏼🧱👍🏼

[@sara-el404]

Hi dad

[@joebrown9901]

Llama Wolf /

[@seanolaoire7781]

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

[@SteveAndAlexBuild]

Sean Olaoire . Lol , absolutely , just after it takes a dump in the sand bag 🤢😂😂🧱👍🏼

[@equinox747]

i know the feeling, I've got 30 doves, I've got to remember to lock them in the night before. or I could leave the 'dove effect print' haha well done,

[@SteveAndAlexBuild]

Graham Markham Damn pesky animals 😂😂😂🧱👍🏽

[@thatowllookshappy]

Hihi, yeah! Then jump a mouse which just gave birth to a bunch of em' lol😋

[@dragonfitter]

I worked for a women that had 38 cats! I layed a massive concrete shed base and believe it or not there wasn’t a single paw Print

[@Bobthebrickie]

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👍🏻👍🏻👍🏻👍🏻👍🏻

[@SteveAndAlexBuild]

Bob Hendry . Cheers Bob , he’s a natural on that float , hardly any practice . Last slab we did we were short so made sure we had plenty in this time . The barrow lads were great , just worked to our pace ( slowish 🙄😂) . A lot of Barrow services just want to lash it in and get away .🧱👍🏼

[@davidflavin]

Love that smooth finish

[@SteveAndAlexBuild]

😏👌🏼🧱👍🏽

[@christophersluce3291]

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

[@SteveAndAlexBuild]

Thanks Christopher 🙏🏽🧱👍🏽

[@jayluas7626]

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

[@SteveAndAlexBuild]

Jay jay Bee . Nice one thanks pal 👌🏼🧱👍🏼

[@DevilishHunk]

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

[@SteveAndAlexBuild]

Trumpton Boff . Ah the back was fine after this , wait till you see the steels video 🥵😬😳🧱🧱👍🏼

[@zulu59blue27]

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

[@SteveAndAlexBuild]

zulu59 blue Thanks pal, we are glad you enjoy the channel 🧱👍🏼

[@farmergoggin2102]

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

[@SteveAndAlexBuild]

Chris Jones . Thanks Chris , we nearly forgot them and had to get them in quick before the concrete arrived 😬🧱👍🏼

[@farmergoggin2102]

@@SteveAndAlexBuild easier done. Seen so many missed off

[@SteveAndAlexBuild]

Chris Jones 🧱👍🏼

[@barneykennett9282]

Great attention to detail...👍

[@SteveAndAlexBuild]

Barney Kennett Cheers pal , thanks for watching and commenting too 🧱👍🏼

[@philglover2973]

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🇬🇧🇬🇧🇬🇧🇬🇧

[@SteveAndAlexBuild]

Phil Glover .Thanks pal , we are glad you enjoy the Channel 🧱👍🏼

[@rodfair5698]

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

[@SteveAndAlexBuild]

Rod Fair . There are worse habits 😂, best thing for it is to watch a few more 👌🏼🧱👍🏼

[@honorkemp]

loved it becoming a big fan

[@SteveAndAlexBuild]

Thanks a lot 🤜🏽🤛🏽🧱👍🏽

[@scoyle1750]

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 👍

[@SteveAndAlexBuild]

wheaten bread . Nice one thanks for the tip pal 👌🏼🧱👍🏼

[@chriswhitehead8746]

Lovely stuff boys

[@SteveAndAlexBuild]

Chris Whitehead Nice one thanks Chris 🧱👍🏼

[@patrykgadomski4951]

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

[@SteveAndAlexBuild]

Thanks patryk 🧱👍🏽

[@brickbybric]

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 .

[@SteveAndAlexBuild]

bric bybrick . 7 metres 😳. Thanks for the tip pal 🧱👍🏼👌🏼

[@arkansas1336]

Good looking concrete!

[@SteveAndAlexBuild]

arkansas13 Cheers buddy 🧱👍🏽

[@leetaaprayzaanio4751]

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

[@SteveAndAlexBuild]

No probs pal glad it helped 🧱👍🏽

[@seamusfoster]

Proper job 👌👌👌👌👌👌👌

[@SteveAndAlexBuild]

Sean .cheers Sean 🧱👍🏼

[@adis473]

Thanks for sharing

[@SteveAndAlexBuild]

🧱👍🏽

[@richie9777]

Great job lads

[@SteveAndAlexBuild]

Richard Powell Nice one thanks Richard 🧱👍🏽

[@MrJFoster1984]

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 👍

[@SteveAndAlexBuild]

Helicrete Sydney . That method you describe is how our firm does new build house slabs . They are reinforced and called a suspended slab 👌🏼🧱👍🏼

[@MrJFoster1984]

Bricklaying With Steve and Alex Correct mate. I know you know just like to share for the other watchers 👍

[@SteveAndAlexBuild]

Helicrete Sydney . Ah , I get you now pal . Thanks , that’s what the comments are all about 👌🏼👍🏽🧱

[@garyharrisonuk]

This method sound brilliant! Love the idea of the 'encased' slab. I wonder if UK Building Regulations would be ok with this method.

[@garyharrisonuk]

This method sounds brilliant!! Love the idea of the 'encased' and supported slab. Wonder if UK Building Regulations would be OK with this method.

[@borisapantelic7186]

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

[@SteveAndAlexBuild]

Thanks very much , and thanks for your support 🧱👍🏽

[@husseinmusa9332]

Aww thanks for the very good job. God bless. See you soon

[@SteveAndAlexBuild]

😁🧱👍🏽

[@daz3660]

We call it scurrying and tamping, great vids guys

[@SteveAndAlexBuild]

TehGoldfish - I thought we would all have different names for it 👌🏼, thanks for watching and commenting 🧱👍🏼

[@sydneyshinshi]

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.

[@SteveAndAlexBuild]

Michael Magill . 😂😂 Thanks pal , I’m sure granny would love that 👌🏼🧱👍🏼

[@MÃONAOBRACONSTRUÇÃOCIVIL]

🏘🏘🏘🏘🏘show

[@SteveAndAlexBuild]

MÃO NA OBRA MIRO STARSUPER 🙏🧱👍🏼🤝

[@markhep]

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

[@brickbybric]

Mark I know the feeling .That’s the concrete fever striking . having the right tools to do the job like a magnesium bull float and the American type concrete rakes keep the stress levels down . I’ve seen blokes go loopy at the sight of a concrete lorry arriving.

[@markhep]

@@brickbybric 👍 Yere and then you pull it back praying that you got the right amount your not short or not too much 😂😂😂

[@brickbybric]

Mark Hep spot on👍 . I subbed to your channel mark good stuff by the way.

[@markhep]

@@brickbybric thanks mate 👍

[@SteveAndAlexBuild]

Mark Hep . Yep ! No matter how prepared our are that wagon pulling up always gets the nerves twitching 😳😬🧱👍🏼

[@drewjamacdermid3737]

Great video. Seriously Great 👍

[@SteveAndAlexBuild]

Drew James Alexander MacDermid Thanks very much 🧱👍🏽

[@rodfair5698]

Nice one lads!

[@SteveAndAlexBuild]

Rod Fair . Cheers Rod . 🧱👍🏼

[@Dovachin]

Nice work fellas!

[@SteveAndAlexBuild]

Thanks pal 😁🧱👍🏽

[@FPDEVELOPMENTSLTD]

Great videos as always lads 👍🏻

[@SteveAndAlexBuild]

Cheers pal have a good weekend 🧱👍🏼

[@RodianBuilds]

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

[@SteveAndAlexBuild]

Ha just sat watching you get piss wet through on roof 😬. Slabs can be very easy occasionally!😬 most of the time they can be awful to do . We prepped this one night in the week so we weren’t flapping in the morning of the pour . This one went well , glad you like it 🧱👍🏽

[@shaun2049]

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

[@SteveAndAlexBuild]

Shaun Dalton . Thanks pal , it’s just duff info I’ve picked up over the years we’ve always just called it screeding and tamping . Cheers pal 🧱👍🏽

[@johnpeplow3985]

Lovely bit of screening.

[@SteveAndAlexBuild]

Cheers John. 🧱👍🏽

[@dannywilkins887]

Wow! Smooth as a runway lads😅

[@SteveAndAlexBuild]

danny wilkins . Nice one cheers Danny 🧱👍🏽🛬😂

[@rossmale8715]

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

[@TurinTuramber]

Think they cut 100mm into 25mm rips. If using 25mm sheet then totally agree. 👍

[@rossmale8715]

@@TurinTuramber yeah I thought that,but then the foil is facing the wrong way.doesnt make all that much difference though to be fair unless you've got underfloor heating

[@SteveAndAlexBuild]

Ross Male . Yes we just ripped the 100 mil into strips , I like the 200 mm strips in first idea though , thanks .🧱👍🏼

[@mattcartwright8272]

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

[@SteveAndAlexBuild]

Matt Cartwright . Your spot on mate it really takes it out of you 🥵🧱👍🏼

[@tomgazebobob1503]

Hard hacker lads. Well done.

[@SteveAndAlexBuild]

Cheers Tom 🧱👍🏽

[@fuzmaginty5822]

Great video this well done lads👍

[@SteveAndAlexBuild]

Cheers Rod 🧱👍🏽

[@keithwhittaker7628]

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

[@SteveAndAlexBuild]

Good ideas 🧱👍🏽

[@fruitgums]

I am not sure I've ever seen that. However for garage conversions the 100mm insulation means you do not need a DPM at all, either on the floor or the walls, but check that with B/C but mine said it was unnecessary.

[@chompyb]

@@fruitgums Surprised at that from BC. How do they know what damp proofing is under the garage floor? Any mention of taping the pir board joints?

[@leeknifton648]

Very helpful. Cheers.

[@SteveAndAlexBuild]

😁🧱👍🏽

[@Ratsotone]

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

[@SteveAndAlexBuild]

Always great to get it done 👌🏼🧱👍🏽

[@jayfallows5749]

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

[@SteveAndAlexBuild]

Jay Fallows . Cheers pal ....... duff information from back when I was an apprentice 😬🧱👍🏽

[@lincordery2506]

great film work alex

[@SteveAndAlexBuild]

Lin Cordery Cheers 🧱👍🏽

[@MrJohnnynapalm7]

Good, detailed, explanation - thanks for sharing 👍

[@SteveAndAlexBuild]

Cheers Paul 🧱👍🏽

[@ConstructionChannelLuxembourg]

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?

[@SteveAndAlexBuild]

Construction Channel Luxembourg Thanks glad you enjoyed it . No re bar because it’s not a suspended slab 🧱👍🏼👌🏼

[@joun456]

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

[@SteveAndAlexBuild]

Joun456 . Thanks pal , now you’ve requested it we will get one done when we get chance . Thanks for watching and commenting 🧱👍🏼

[@selfsovereign1995]

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

[@SteveAndAlexBuild]

Not needed 🧱👍🏽

[@zalkhirsan9481]

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

[@SteveAndAlexBuild]

Z Alkhirsan Thanks very much pal , I’m not sure as we’ve never done a slab for underfloor heating 🧱👍🏽

[@jameshazelip3998]

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?

[@SteveAndAlexBuild]

Thanks James . Don’t know anything about under floor heating unfortunately 😬🧱👍🏽

[@jameshazelip3998]

@@SteveAndAlexBuild no worries thankyou for the response 👍

[@SteveAndAlexBuild]

Good luck 🧱🧱👍🏽

[@norfolkngood244]

Subscribed

[@SteveAndAlexBuild]

Thanks pal and welcome to our channel 🧱👍🏽

[@sarahyarwood3743]

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 .

[@SteveAndAlexBuild]

Sarah Yarwood . Don’t do a lot of slabs so never realised the Bottom visqueen neeeded to lap up . As for mesh the slab doesn’t need it as it’s not a suspended slab . Thanks for watching and commenting 🧱👍🏼

[@itsmewayne428]

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

[@SteveAndAlexBuild]

Wayne Bailey .Cheers Wayne , that 1st DPM is a pain because it didn’t need blinding before we had to start putting it in . Apparently moisture doesn’t agree with the insulation 😬🧱👍🏽

[@garvielloken3929]

nooice

[@SteveAndAlexBuild]

Cheers 😆🧱👍🏽

[@barryjervis1893]

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?

[@SteveAndAlexBuild]

Loads mate , we have over 200 videos just have a scroll through 🧱👍🏽

[@janmurdoch7986]

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

[@SteveAndAlexBuild]

Your right , once the concrete is on top and cured that insulation ain’t going anywhere 😉🧱👍🏼

[@mickbroadbent6750]

how relaxing guys good job ,,,, I thought screeding was a nearly dry mix for floors which you could easy walk on instantly am I wrong cheers

[@SteveAndAlexBuild]

mick broadbent . Your probably right pal , I was told just the action was screening 🙄🧱👍🏼

[@MrJFoster1984]

That is a different mix for laying other floor finishes on top say timber/laminate flooring or tiling etc. The action of using a straight edge to level it is screeding, same as a plasterer screeding off a wall 👍

[@SteveAndAlexBuild]

Helicrete Sydney 🧱👍🏼

[@chemistrykrang8065]

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!

[@SteveAndAlexBuild]

Sounds good , a pit complicates things 😬. Good luck 🧱👍🏽

[@Forest_Ry]

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 👍👊

[@SteveAndAlexBuild]

RJM Bricklaying & Outdoors . Evening pal , never used one ourselves, probably because they are £150 ! 🤯. The barrow lads use them for the concrete, have a good n too pal 🧱👍🏼

[@Forest_Ry]

@@SteveAndAlexBuild Evening to you too pal 🌞.... £150 for a barrow 😱, no chance, it should be good plated for that 😂. Enjoy your evening guys 👍.

[@SteveAndAlexBuild]

RJM Bricklaying & Outdoors you too pal 🧱👍🏼

[@janetstone236]

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

[@SteveAndAlexBuild]

Janet Stone As it’s not a suspended slab there is no need for it . 🧱👍🏽

[@philij83]

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

[@SteveAndAlexBuild]

High Phil I’m not sure what you mean mate 😬🧱👍🏽

[@philij83]

@@SteveAndAlexBuild So normally (what I've seen) the sub structure is blockwork to ground level and a couple of courses of brickwork and the pad is built up flush to that level, however back in the 1800s it appears there wasnt much thought about damp and so my floors are level with the ground outside. Do I just need to wrap/extend the dpm up the sides of the blockwork to prevent damp penetration with damp course on top to prevent any wicking through the brickwork?

[@SteveAndAlexBuild]

@@philij83 it’s a tough one that . Play safe and ask your local building control 🧱👍🏽

[@fonzynaitor]

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

[@SteveAndAlexBuild]

No it should be ok . Rain on sand compacts it and has probably helped , good luck 💪🏼🧱👍🏽

[@fonzynaitor]

@@SteveAndAlexBuild thanks alot for replying much appreciated 🤙🏼

[@SteveAndAlexBuild]

@@fonzynaitor . 😁🧱👍🏽

[@crazygeorgelincoln]

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.

[@Mark-gf7yw]

Flooring trowel

[@crazygeorgelincoln]

@@Mark-gf7yw Cheers!

[@SteveAndAlexBuild]

crazygeorgelincoln . I was told many moons ago it was called a “Big Ben “trowel , I’m sure it’s got different names wherever you go . Thanks for watching and commenting 🧱👍🏼

[@JayKTS]

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 ? 😅😎👌🏻👌🏻👌🏻

[@SteveAndAlexBuild]

Hi Jay, it’s the finished floor . The floor covering goes straight onto it 👌🏼🧱👍🏽

[@MrFlynnytwo]

Jay Puyenbroeck screeding is laying screeds of concrete or mortar using a straight edge plasterers use screeds on walls to bring the mortar true and plumb

[@-nj-6213]

Nice video, how come no re-bar?

[@SteveAndAlexBuild]

N-J eff . Thanks pal no need as the slab isn’t suspended 🧱👍🏽

[@davidtonge6534]

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

[@SteveAndAlexBuild]

Yes David, you just dig deeper 🧱👍🏽

[@pgtips4240]

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.

[@SteveAndAlexBuild]

PG Tips good question we just need to have faith in the manufacturers guarantee 😬🧱👍🏽

[@MrOitoyboy]

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

[@SteveAndAlexBuild]

MrOitoyboy . Funny enough it’s one of the first with no footprints the day after 🧱👌🏼👍🏼

[@MrOitoyboy]

Bricklaying With Steve and Alex NO WAY! I don’t believe you 😂

[@SteveAndAlexBuild]

MrOitoyboy 🐈🐈👣👣👣👣👣👣👣😂😂😂

[@rishidoshi7280]

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?

[@SteveAndAlexBuild]

Dpc is used mainly in brickwork and is placed in at 150 mm above ground level . It Is made from wpquite thick plastic . DPM is also made form plastic but comes in 4 m wide rolls . It is used under insulation then under concrete floors to stop rising damp . Hope that makes sense 👍🏼🧱

[@rishidoshi7280]

@@SteveAndAlexBuild Thank you very much. One last question: on a trench fill foundation, how high should you fill the trench? What's the minimum space you should allow from the main surface level of the house in order to allow for drainage and other services?

[@SteveAndAlexBuild]

@@rishidoshi7280 No probs . I think it’s about 450 mm 🧱👍🏽

[@antonios4926]

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.

[@SteveAndAlexBuild]

We use MOT . It compacts really well and the floor is level with the existing floor never just follow the dpc 🧱👍🏽

[@antonios4926]

@@SteveAndAlexBuild Thanks for the reply

[@SteveAndAlexBuild]

@@antonios4926 . No probs 😁🧱👍🏽

[@geze4137]

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

[@SteveAndAlexBuild]

No never heard of one of them🙄🧱👍🏽

[@richardadams2877]

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.

[@SteveAndAlexBuild]

All sounds good 100 mm in the minimum so you are getting a good floor there . As long as there is a Dpm in there somewhere it good to go 👌🏼🧱👍🏽

[@richardadams2877]

@@SteveAndAlexBuild Thank you, much appreciate you taking the time to help out.

[@SteveAndAlexBuild]

@@richardadams2877 No probs good luck with the build 🧱👍🏽

[@Inquisitive37]

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

[@SteveAndAlexBuild]

I don’t think there is much you can do to insulate the floor now as there isn’t much room . 😬🧱👍🏽

[@Inquisitive37]

@@SteveAndAlexBuild thanks for the reply man. So would we simply put 12mm underlay and carpet? Or am I missing something else

[@SteveAndAlexBuild]

@@Inquisitive37 I’m not too sure . Maybe ask at a builders merchant or a carpet shop they will know of any products that may help 🧱👍🏽

[@Carl-yu6uw]

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

[@SteveAndAlexBuild]

We just return the block to close the cavity at the same width as the door 🚪 🧱👍🏽

[@Carl-yu6uw]

@@SteveAndAlexBuild Figured so😁 having that measurement is handy yeah!

[@SteveAndAlexBuild]

Definitely 👌🏼🧱👍🏽

[@Charlie-rk9xx]

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

[@SteveAndAlexBuild]

No not under a certain size 🧱👍🏽

[@stun9771]

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...!!

[@SteveAndAlexBuild]

Stuart Nagle . Don’t understand what you mean 🤔

[@garyharrisonuk]

Is using 300mm minimum infills a building regulations requirement or your personal recommendation? Thanks

[@trevorkeast]

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

[@SteveAndAlexBuild]

If you left it yes but the idea is to prep the floor and concrete it straight away 🧱👍🏽

[@trevorkeast]

@@SteveAndAlexBuild do you have to bring the liner up the sides of the brick? Can't you just cut it flat flush with the sand layer?

[@SteveAndAlexBuild]

@@trevorkeast The Dpm needs to Lap up and under the dpc of the internal skin 🧱👍🏽

[@diluxe]

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 ?

[@SteveAndAlexBuild]

Hi Robin . We put in 150 mm hard core ( compacted with Walker plate ) 20/30 mm sand blinding ( whacked again ) 1st visqueen (Dpm) 125 mm polystyrene 25 mm strip around the perimeter 2 nd visqueen 100 mm concrete slab . 👌🏼🧱👍🏽

[@diluxe]

@@SteveAndAlexBuild thankyou for taking the time to Reply

[@SteveAndAlexBuild]

@@diluxe No probs, thanks for watching and commenting 🧱👍🏽

[@giotto4321]

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?

[@SteveAndAlexBuild]

Thanks very much. Depending on the weather probably about an hour as long as it’s not hot and sunny 🧱👍🏽

[@giotto4321]

@@SteveAndAlexBuild Thanks for the reply, I'm surprised it's so short, for some reason I'd thought it might be several hours.

[@SteveAndAlexBuild]

@@giotto4321 . You can get additives like retarders that will extend it’s workable time 🧱👍🏽

[@Bela12351]

Hi guys. Thank you for the great video. I am planning to do my ground floor. When do you recommend to use reinforcement mesh?

[@SteveAndAlexBuild]

It can’t do any harm to put it in 💪🏼🧱👍🏽. Good luck with your project

[@mrjamesmay3548]

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

[@SteveAndAlexBuild]

I can’t see why not as long as long as you’re organised and have a few pairs of hands. It’s better to prep one day and concrete another just in case of hick ups 👌🏼🧱👍🏽

[@mrjamesmay3548]

@@SteveAndAlexBuild thanks I wasn’t too sure about leaving the insulation over night in case we got heavy rain.. thanks for the reply

[@SteveAndAlexBuild]

@@mrjamesmay3548 if you get your visqeen on top your ok then If it does rain overnight you can pull it back to drain it . Just allow plenty of time for each stage 👌🏼🧱👍🏽

[@mrjamesmay3548]

@@SteveAndAlexBuild cheers mate 👍

[@SteveAndAlexBuild]

@@mrjamesmay3548 zNo probs , good luck 🧱👍🏼

[@cnpattkid9972]

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?

[@SteveAndAlexBuild]

The depth depends entirely on the ground conditions. You need to get building control out for local advice pal 🧱👍🏽

[@shanehickey1074]

Dont forgot to clean the patio door

[@SteveAndAlexBuild]

No need they were going the skip 🧱👍🏽

[@bigvegass]

My house was built in 2000. I wish they would have put that foam under the slab

[@SteveAndAlexBuild]

Wes . Yes so easy to put in as you build , massive mess to do after 😬🧱👍🏽

[@penistonelodge6796]

How do you make sure it’s exactly the same height as the floor inside

[@SteveAndAlexBuild]

Penistone Lodge We open the door and put a spirit level on the door threshold and measure down to the house slab , then measure down on the outside wall and mark the slab height . Another way is to knock out a couple of brick from both skins so you can put your level directly on the slab to transfer the level onto the outside. Hope that makes sense 😬👌🏼🧱👍🏼

[@Macro_Abuser]

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

[@SteveAndAlexBuild]

Macro Abuser . I agree but it’s Buildings regs 🤷🏼‍♂️🧱👍🏽

[@Macro_Abuser]

@@SteveAndAlexBuild Glad you agree, I did something similar to my shed but only put 1 DPM. I was getting worried 😂

[@SteveAndAlexBuild]

Macro Abuser 😂😂🧱👍🏽

[@deputyvanhalen6386]

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!??!

[@SteveAndAlexBuild]

Deputy Van Halen That is a massive extension 🤯👍🏽🧱

[@deputyvanhalen6386]

@@SteveAndAlexBuild yeah , I extended back of a shop with double storey on stop. I still feel I might have put a bit too much concrete. To be honest I'd say it was 14 inches.

[@SteveAndAlexBuild]

Deputy Van Halen . You can’t overengineer a foundation 💪🏼💪🏼🧱👍🏽 Better too much than not enough 👌🏼

[@MMG_MoonManGuitar]

Great work lads. Make it look really sexy!

[@SteveAndAlexBuild]

Cheers pal 😂😂🧱👍🏼

[@CurvedSlightly]

No reinforcement mesh?

[@SteveAndAlexBuild]

Chuck Norris . No pal no need . It’s not a suspended slab 🧱👍🏽

[@abhishekbenny7930]

Don’t you need rebar or mesh?

[@SteveAndAlexBuild]

No need on such a small slab plus it’s not suspended 🧱👍🏽

[@dozer1642]

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

[@SteveAndAlexBuild]

Dozer1642 . Worth every penny wait till you see it when the wall is out 👌🏼🧱👍🏽

[@ozzyefc44]

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

[@SteveAndAlexBuild]

ozzyefc44 hardcore needs to be minimum 150 mm then your sand blinding is enough to cover any sharp edges to protect your Dpm 🧱👍🏽

[@ozzyefc44]

Thanks for the reply ste and Alex 👍

[@ozzyefc44]

By the way great work and great videos my only moan is that we can't hardly hear you when you're talking into the camera 👍

[@SteveAndAlexBuild]

ozzyefc44 Thanks very much pal . We have a new camera now and I’m mire confident talking to the camera now . 💪🏼🧱👍🏽

[@ozzyefc44]

No problem mate look forward to watching more of your videos 👍

[@ulleammac-an-toisich8100]

why 2 dpm?

[@SteveAndAlexBuild]

This insulation absorbs water so needs protecting from damp underneath 🧱👍🏽

[@martynmongan9123]

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.

[@SteveAndAlexBuild]

Your eye sight I’ll give it a 3/10 as there was a cold bridging strip installed at 4 mins with a big notice pointing it out and a still photo showing it clear as day . All constructive comments are welcome on our channel but when people slag us off when they haven’t even watched the video properly it just makes you look silly 🙄

[@martynmongan9123]

@@SteveAndAlexBuild Hahaha, fair play mate. Still should be on the dry side of the DPC as per BBA certification.

[@SteveAndAlexBuild]

@@martynmongan9123 . Didn’t know that bit , thanks . They always have to make it awkward 🙄🧱👍🏽

[@lmilne4859]

No steel mesh.

[@SteveAndAlexBuild]

L Milne No need it’s not a suspended slab 🧱👍🏽

[@seriously1184]

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

[@SteveAndAlexBuild]

NO NEED !!!! 👍🏽🧱

[@richnottmforestmarley4347]

Made hard work of that should done half screed down middle

[@SteveAndAlexBuild]

Rich Nottmforest Marley . It doesn’t get any easier than working off 2 solid walls ! 🧱👍🏼