THE BEST BRICKLAYING TECHNIQUE is Frog up or Frog down?
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- čas přidán 16. 03. 2020
- THE BEST BRICKLAYING TECHNIQUE is Frog up or Frog down?
Brick frog up or brick frog down, which is the best way to lay bricks when building a brick wall? In this video I explain the two methods of brick construction and give my opinion to which is the best practice for a bricklayer to use when building a wall and to help lay bricks fast. I also refer to an extract from the BDA guide to successful brickwork book.
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I layed frog down for most of my price working life, less wrist stress pressing the bricks to the line, online recently in last few month converted to frog up pic and dip, I still find it easier to build corners/pillars frog down, you get the suction effect and less sliding affect around the bricks when doing level work, plus a nice flat top level off
You guys over the pond make a joke out of most of the “brick” guys here in the USA. The knowledge you have, attention to detail, and skill is second to none. 👍🏻👍🏻
I love how 2 minute Tuesdays have never been shorter than 6 minutes 😂 keep it up rodian, love your channel mate 👍
I'll get to 2 minutes one day 🤣
I used to lay frog down through habit, changed now through words of the boss.....but I built a 5 ft high x 20ft long retaining wall in a garden way back in 2003 with a frog down wall. The wall is still in one piece looking as solid as the day it went up 🤷♂️
I say bloody good show old boy, another great vid mate, teaching me loads 👍🏼👍🏼
Well done. Agreed 👍🏻
Frog up always but sometimes bricks have a grain with little pockets in the brick where water can collect when layed frog up which is more damaging
The frogs are there to make the brick lighter and use less clay , the old lbc bricks had huge frogs , cheaper to manufacture and lighter to move to the site , as muck is mixed on site it's cheaper. I would lay the last course on a single skin frog down so it doesn't collect water .
Definitely frog down. It's so much easier recovering the bricks for my own projects.
I was building a long gable wall with a another bricky , I was laying frog up he was laying frog down ,a strong gust of wind blew up from nowhere .My half was still standing, his half was on the floor (the wall at this time was about 4 ft 6 to 5 ft high) That in my book says it all lay the King Dicks frog up . Yours Pommy Pete
recommended frog up by manufacturer and building quality control, but depending on brick and mortar used it can be easier frog down
Frog up all the danm time. I’ve fitted many rsjs on extensions and when they built the house frog down and you’ve got to put a rsj in to make a big opening it’s like a game of kerplunk when they are falling down between your strong boys because they can’t tie in together.
That's why you put padstone down 🤔
anthony worthington oh yeah you do... but when your knocking the bricks out where the beam is going to go a pad stone isn’t going to do any good is it? The reason they are falling out is because they’ve been layed frog down even when you’ve put strong arms and acrows in
Rodian you can’t be certain that the first brick you laid had no voids in the bed because of the deep furrow you put in the bed . If you lay brick with shallow frogs , frog down into an unfurrowed mortar bed you can be certain the frog will be filled . Why do bricklayers furrow mortar , because when they are serving there time they we’re told this is how you lay a bed . Charlie collison has proved conclusively in his videos that brick can be laid no bother into unfurrowed mortar and you can be 100 percent certain there is no voids in is beds . I think the real problem in brickwork is not Laying them frog up or down it’s laying into deeply furrowed mortar and leaving voids in the bed . Obviously laying frog down into deeply furrowed mortar can create bigger problems than frog up into deeply furrowed mortar but they are both problematic. Lay shallow forgged brick any way you like but cut out or cut back drastically on the furrowing and you’ll have no problems regarding full beds.for the record I lay frog up.
I think modern bricks are perforated for transportation less weight more brick on a pallet. The holes got bigger and bigger over time to the point your now filling them when you spread using more mortar. Good video mate 👍frog up
Only the cowboys lay frogs down all the time because they save a lot of sand on a big job. As I was taught as an apprentice, always frog up for strength.
My bricks have frogs on both sides lol.....
All sounds like good advice. But I was told that you could lay frog down to build a lighter structure also air pockets would give an amount of insulation.
If frog down, you've got to lay the mortar centrally along the brick and leave a high ridge in the middle. When compressing the brick onto the mortar, the mortar will first fill the frog, then displace towards the edges. Got to spread the mortar right if doing it that way. The flat top of the brick makes spreading easier.
Guidelines however are guidelines and you can't argue with the maths of the matter.
My 1920s 9 inch solid brick wall house has the frog down with lime mortar. i guess any air pockets with unfilled frogs will act like a cavity insulation even if the strenght is not there.
Think most people in the game know this shouldn't really even be an argument . Frog up , who fills in the fogs laying down , except frog uppers when maybe they're grinding . Was taught at college if you lay down the tails on the corners and last course before a break lay up . The guy knew people will lay down and was telling you not to get caught . Say's it all for me.
If you do lay frog down, you always put loads a gobbo down standard.
If they want full beds etc then they shouldnt put holes in a brick either, every bricky knows that them holes never get filled completely do they.
We just done an extension and on the existing it was frog down, you got to marry up with the exsisting but we do usually do frog up with them dirty lbc’s😂
Oh and when you knock down a wall of lbc frog down its so easy🧱😂🧱😂
With shallow frogs I can’t imagine it matters that much as there’s barely any frog, but always frog up, barely any harder than frog down👍
Frog up as if it's not filled the brick will wear away to leave a hole,with it filled it will be solid😁
Good explanation for guys new to the trade, Rodian. Spot on with the reasoning. 👍Anyone who is in the trade already and says it is OK to lay frog down needs to have a word with themselves. 😉
Many years ago i laid probably 20k brick frog down on a big job before i really knew any better. The building is still there! Swear to god. Lol.. However i learned that they should be frog up.
You should done your comparison with the frog down with the lower course frog down. You put frog to frog so of course you probably had air pockets. Place the mud and don't furrow it with the frog down and then remove the brick so see if there is a pocket.
Frog up always, no excuses. Amount of walls I have put a cut down and they are full of gaps. Everyone says up but someone must be laying frog down!
Ive worked in masonry restoration for many years... And I agree frog up is the way to lay
But Paddledog is right the old school brick buildings
A lot were laid frog down to prevent water ingress and pooling inside the frog as lime mortar was used
They understood that the frog gave them more lateral strength
But knew nothing about compression strength ratings in those days
Have a look at brick built buildings from before the Victorian age
Anything before the 1800’s you will see a lot of frog down masonry
British Standard Code of Practice BS 8000-3 Workmanship on Building Sites states that;
“Unless otherwise advised, lay single frog bricks with frog uppermost and double frogged with deeper frog
uppermost. Fill all frogs with mortar..... Bricks walls built with frogs down and unfilled are weaker and less resistant to
sound transmission. Advice should be sought as to whether bricks laid frog down are acceptable”.
👍
Difference between all fogs down and all frogs up. Cheers
Modern brickwork is half b with cavity only the inner skin block work takes the pay load which is normally 3.5 Newton’s the outer skin is half b and is only a facade
Frog up my man, frog up.
Normally frog up as you go up but frog down if you need to get down (only one course)
I know of no clay frog brick manufacturer in N. America they all have holes or (keys) with the exception of concrete frog brick. Saying that…frog up all day long. 👍
Frog up 👆
Frog up for strength, science proves this. But in Australasia we would have been taught frog down. The vast majority of our brick exteriors are not load bearing, simply a veneer. The frog down intentionally leaves a void to assist in pressing the brick in place by hand and not having to tap the brick with your trowel, a habit that slows you down and regarded not good trade practice.
Frog up..ribiht. Less voids..5% void = 30% weakness in the structure
Frog up! See good article on this on pavingexpert.com and how it affects loading and stresses on a wall
frog up
yep frog up every time
There’s no debate only a dummie would lay them frog down. Frogs 🐸 up a must. What a would them bricks wouldn’t be the best example. Some of the bricks have really deep frog.
Frog up
frog up all day long. the only reason you could say for frog down is saving money on muck but really how much would it save?
Frog up bricks laid wages paid
Where I live (Central EU) regular bricks are red and do not have a frog at all. Both sides are flat... You'd have to search really hard to find indented bricks for sale. Do you have such bricks in UK?
Yes. No frog bricks are readily available ,
Depends if your beds are tight lol
Saw this by accident really, but just wondering why would you use the argument of getting a higher compressive strength when you lay frog up to recommend always laying this way. 7N/mm2 is normally enough even for buildings up to three storeys, so unless you're building something which require more compressive strength, it really doesn't make sense to even mention that argument really. More is not always better, and there are other arguments to have in consideration here. If you're building a garden or a retaining wall, for instance, I would recommend to lay frog down if you have some experience and, as you say, go through the hassle of making sure you don't leave air pockets and you infill the frog properly. If you don't have much experience, however, I would always recommend to lay frog up, just to be sure that you leave no air pockets. If you don't infill the frogs properly, chances are your wall will be more vulnerable to lateral or wind loads, which should probably concern you more than the compressive strength you achieve in most scenarios. Laying with the frogs up will probably mean some water remains in the frogs when it rains, which might, nor not, be a problem as well. There is not a better way of doing this, they're just different and each one has its pros and cons.
Nice video anyway.
Yuup frog up , nothing different to add to everyone else except for many years ago all we did frog down was the cavity closures at wall plate . Also it’s much easier to nip the frog for the ties to work if for some reason they creep off 🤪. PEACE.
What about on 6 inch semi solids ?
They go in the skip 🤣
Bricks are engineered to be laid frog up all the time no other way!! The only reason some people lay bricks frog down; is they mistakenly think they're saving money on the mortar!!🤔🤔
Frogged vs cored?
Cored. Unless it's a shallow frog. Some bricks have far too big cores. LBC bricks have too big a frog = nightmare to lay.
You’re not supposed to furrow the mortar. You didn’t spread enough. Frog up holds water that has to pass through brick to escape.
PaddleDogC5 that’s not how any of this works lol
Ive worked in masonry restoration for many years... And I agree frog up is the way to lay
But Paddledog is right the old school brick buildings
A lot were laid frog down to prevent water ingress and pooling inside the frog as lime mortar was used
They understood that the frog gave them more lateral strength
But knew nothing about compression strength ratings in those days
Have a look at brick built buildings from before the Victorian age
Anything before the 1800’s you will see a lot of frog down masonry
Frog up it is obvious
BLFUWP !
😬here goes ....... don’t lynch us but ..... the lads we work for insist the two course of commons we put inside are laid frog down , the reason being that the block n beam floor sits on on them and If they are frog up the beams ain’t sitting on much . In our defence the frogs are very shallow and easy to keep full . We would much rather use solid commons...... proper job them 💪🏽💪🏽💪🏽🧱🧱🧱👍🏼
Do the same mate for beam course, some of the packs of commons were solid and others frogged 🤷♂️
adam chandler 🧱🧱🧱👍🏼
Fair enough you do what you are asked. When beams can be laid on blocks that have a 2.8nm crush load, it seems pointless to think that any brick laid frog up would be less than this.
It would make sense to frog them for beams....like you say, obviously better to lat solid bricks in their place though 🤙🏼🧱
Rodian Builds we would much rather use solids 🙄🧱👍🏽