Valley Lay boards Marking the angles, cutting and fitting explained

Lay boards are made and fitted to a roof structure where we join another roof, often called valley lay boards they conect the addition roof to the main roof by laying on top of the main roof
In America I have heard them referred to as a Cricket roof!!
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[@antonoat]

So when people question the cost of a roof, just consider how much skill, specialist tools, materials and time it takes to produce, seems cheap when one considers all these things 👏👍😀. Great job Robin.

[@dennishughes3250]

On another video I posted a comment that the best bit was the valley boards just slotting in. Today you show me how that happened. Robin Clevett, the gift that just keeps giving.

[@ukconstruction]

Thank you Dennis 😊

[@Oggmiestergeneral]

That roof structure is a thing of beauty!! Lovely work.

[@RI-uv3lm]

The moment when that splayed cut sits perfectly & on the line - priceless . Like ‘ let the geometry do its work’ Fantastic Robin! The perfectionist 👍 ❤️

[@briangriggs7651]

Great informative video as allways .nice work Robin .

[@marclindsay6120]

Amazing work again robin. A true craftsman.

[@davidfisher268]

Wow, made sense as you installed them! You are amazing

[@Andy-ow2cx]

You definitely have bragging rights to be a skilled builder "joiner/carpenter " brilliant in depth and knowledgeable video chhers

[@thehobbyguy]

The guy is a wizard

[@garethjones6072]

Absolute perfection as always looks like it’s grown there

[@colinmiles1052]

Definitely some black magic going on there! Nice work!

[@hawgwild5456]

Thanks Robin - Whilst I will never use this skill, it's still very interesting and your techniques are transferable.

[@luispayen7822]

Brilliant video as always Robin !! . Can’t wait to buy the roofing Square when you release it !!

[@johnchincotta1qwdb15]

You are definitely an experienced skilled builder ,I like the manner you take accurate measurements and cut timber components .

[@daves4026]

I thought I knew it all 😅. But you taught me something new today. Thank you for sharing

[@khansk36]

Excellent teacher outstanding craftsmanship congrats and thanks mate All the best keep up the the good work and sharing

[@englishrifleman6556]

THANK YOU Robin.. i love these videos for cut roofs. stunning work, pure quality.

[@dabruscar]

Brilliant as always mate.

[@T.E.P..]

Spectacular video ... the sound is perfect and tell your camera person they do a fantastic job too. Gorgeous build Robin!

[@ukconstruction]

Glad you enjoyed it

[@thomascoyne157]

Nice too see a tradesman at work 👍👍👍

[@peterbell4154]

Hi Robin great to see a lay board fitted properly. Some don't realise that the length of rafter per ft run with twelve or in metric gives the cut and the side cut for the jacks if you had to cut by hand .👍👍

[@georgechandler7823]

Would love to know more, Peter! How do I get this info? :)

[@projectlivesey5629]

Nice one Mr C, thanks for sharing☺️

[@ukconstruction]

My pleasure

[@marklewisham3088]

Proper craftsman at work...

[@rossmorrow3013]

I sincerely hope that there’s a lot of Maths teachers watching you, because you explain perfectly the whole point of knowing how triangles work, not some dull dry text book, turn to page such and such and read, and if you don’t get it after two reads and my explanation, you’ll be caned!

[@mrboyban]

Very nice work Robin!! I wish I had done carpentry college 20 years ago. Can't find any descent carpenter up in the north.

[@didjwentworth5778]

Robin is the David Attenborough of building. His knowledge always amazes me. Unfortunately here in OZ, most roof trusses are prefab factory made, so even if you do learn these skills, rarely is there a chance to practice them. One day chippys like Robin will be sort after like surgeons.

[@uncle_Samssubjects]

We put them in all the time for additions on the east coast but we call them sleepers, we bevel outside edge to plane better wirh the roof but I've never seen it land on a wall plate, because in my experience the structure I was building was extending out further than the wall..

[@dunes7]

Hello Robin - I have fallen behind on The Big Build and am playing catch up now. I've got to say again, you are extremely talented and I can only admire your skill level and attention to detail.

[@ukconstruction]

Thank you so much 😀

[@PIA-BUILD]

best lay board cut I've ever seen. Will have to give a birdy lay board cut next time

[@MrAidanfleming]

Super accurate!

[@qwertyuiop124172]

Hello Robin, Beautiful... Best wishes from Leicester, ENGLAND. Ahmed

[@micssticksnpipes]

Love these roofing timbers videos. When does your square come out? Put me down for one!

[@johnmorrissey1675]

Nicely done 🤟👏🇮🇪☘️👍

[@user-bj8oe5tj9g]

Another great video mate keep up the good work. What amazes me is not only your skills as a chippie, all the top tools you have, all the tips and the tricks..... but yet.... You always have the same tiny scrappiest little pencil on the go !!! 😂😂😂😂

[@ukconstruction]

Yep I'm only into the old type carpenters pencils!!

[@user-bj8oe5tj9g]

@@ukconstruction yeah me too last another longer especially on wet timber

[@rubiconexotic8753]

Hello Robin Love your detailed explanations of all your videos. You’ve got years of knowledge and it’s great to learn all your tips and tricks! Where can I purchase your roofing square? And square clamp? Perhaps something worth selling on your website 😃

[@jonny4288]

Little bit wet that 😅 great video again Robin

[@kevindowle3302]

Hi Robin, about to buy a Milwaukee M18FFN nail gun for framing/roofing so wondered what nails you use? Was looking for full head but only see clipped head.

[@marlowjoinery9783]

Nice fit il give you that 👍 will you do a vid on how to use your square when you sell the square

[@nielskvist9222]

Hi Robin. Wouldn't it be easier to make the top cut first every time and then mark the seat cut from that? If you do it that way around, you have the point of the top cut to hook your tape measure on instead of holding your tape measure to a seatcut. I know you do it when you mark the second layboard, but not with the first? Lovely work. Cheers from Denmark.

[@sctrader151]

Nice video. Which roofing square do you use please, that has the rafter point? Thanks

[@scottthomas5819]

Nice !

[@eddjordan2399]

i think that roof might last a while. Robin do you feel nail gun nails are too thin do you timber fix joints?

[@matgurd]

When iv roofed dormers with lay boards on top of the rafters like that, iv found that the valley sits high on the dormer side. I feel the 2” sat on top of the existing rafters changes the height….. I’m no expert on it, just what iv come across. Iv come across much older timber work where the lay boards are flush with the existing rafters, which means the dormer rafters come down and sit flush with exiting ones.

[@bobbyranger4164]

A really good point you make. I have seen the lay boards flush many times . I suppose it all depends on the job, blocking between the rafters then snapping a line from top of ridge plate to the back of the dormer to get your jack rafters is quicker in my opinion and requires lees working out., saying that Robins skill level is top notch.

[@brianl5159]

Hi Robin great video well explained mathematical cos 45 ÷ tan 45 = inverse tan 35° plumb cut 55° seat cut

[@brianl5159]

Hi backing angles for hip rafters sin25.7÷tan35=inverse tan=31.77° for 40° pitch side sin25.7÷tan55= inverse tan=16.89° for 30° pitch side 35°and 55° are plan angles. 25°.7 is hip pitch

[@davidguiney2550]

Hey I try this on a calculator cos (45) divide by tan (45) it's giving me 32 degrees am I doing it right?

[@brianl5159]

@@davidguiney2550 Cos(45÷tan(45) = Second function tan= 35.26

[@stantheman7467]

@@brianl5159 What angle for the lay board if it had a Bevel on if running up the length instead of the square edge?

[@brianl5159]

@@stantheman7467 hi sin(55.74)×tan(45)= second function tan=39.57°

[@Jake-tl3rn]

Fantastic video robin. Do you have a way of finding the hip degree with your square without calculating?

[@ukconstruction]

Yes I have a hip valley scale on my square

[@charlschuck6]

How is the Milwaukee framing gun holding any repairs have been done or misfires ? How long have you used it and how long you bought it ?

[@TheBrick2]

How do you do the cut for a roof < 45 deg? Free hand with the circular saw? Or just by hand with a hand saw?

[@ukconstruction]

I can achieve it with a circular saw but its a little more setting up, great question mate

[@philipelkes4244]

Hi Robin Where can I get that roofing square?

[@amazing451]

The piece of timber you measured at point 4.15 of the video to get the 87mm was that a common rafter that you used on the dormers?

[@ukconstruction]

Yes mate

[@amazing451]

@@ukconstruction Thanks Robin

[@andyarmitstead370]

Thanks

[@ukconstruction]

Thanks Andy, that's kind bro

[@andyarmitstead370]

​@@ukconstruction mate I've been looking Hi and low for the calculation of the layboard angles thank you.

[@markharvey5602]

Great video. If the roofs are unequally pitched, with the same soffit dimension, how do you get the fascias to line up?

[@ukconstruction]

the only way is to lower one of the wall plates, in other words when setting out for the wall plates you need to start by drawing the roof from the overhang lowest external corner where the final soffit and back of facia will meet then you will be able to plot on the wall positions, and drawing the rafters in full and then allowing for your height over plate margin usually 2 thirds above outside corner of plate will give you the actual level that the wall plate will need to be. This will mean that the brickwork will be lower on the shallower roof side or if this is not possible then the steeper side will need to be raised this is the only way to maintain a parallel soffit all round and the facia at the same height!!!

[@markharvey5602]

@@ukconstruction Is this what you would normally do, or would you alter the soffit depth on one roof (which I assume would mean the valley wouldn't line up with the intersection of the two wall)? Would love to see this on a video🙂

[@miloclarke5486]

Hi rob, do you ever take notes on different carprentry techniques or is the knowledge you know through experience and making mistakes and doing the job many times over as opposed to learning it from a textbook?

[@ukconstruction]

I was lucky to have a really indepth college training in the late 1980's I also read lots of old construction books and modern publications and basically learnt as much as my brain can handle!! I also like many other people learn over the years from others, small tips and tricks!!

[@miloclarke5486]

@@ukconstruction and do you take notes on the books to aid remembering it?

[@MrGarry128]

Hi Robin, Can we use Hip and Valley angles on a typical a roofing square to mark the lay board angles?

[@ukconstruction]

Thats not possible, unless it has specific marks

[@MrGarry128]

Thanks Robin. I don't have square like yours. Is it possible to use a framing square which doesn't have a rafter striking point and radiating angles marked? Pitch of my roof is 8inches rise per 12inches run. Can I use 8 inch mark as striking point and 12 inch mark on the other arm of the square to find roof pitch angle and strike the lines on the timber. Use that line on timber to transfer pencil mark on the square for finding lay board angle? and find lay board angle by using the 8 inch mark as striking point again?

[@markwilson6500]

So you set up the square at 45degrees measure the distance between the points (the hypotenuse) and then transfer that distance to the length of the side? Is that right?

[@ukconstruction]

Yes mate transfer the common rafter run (the diagonal) up the inside of the square then this is the correct angle

[@0000kris0000]

I’ve never known how to find the lay board angles, other than going up with a bevel or a block of wood and marking it. But is the roofing square available to buy yet? I can’t see it anywhere 🤷🏼‍♂️

[@ukconstruction]

Hi Kris, the roofing Square will be out soon mate on my website www.robc.co.uk

[@0000kris0000]

@@ukconstruction ah great thank you, I’ll keep an eye out then 😃👍🏻

[@johnlasseigne7676]

I want to get one of your clear square fences

[@RepairShop2022]

👍

[@georgechandler7823]

do all the standard framing squares work in this way, Robin? Or is yours different :)

[@ukconstruction]

It's the marking on mine

[@georgechandler7823]

can it be purchased ?

[@carrsconstruction7594]

Hi mate what nail gun are you using?

[@kennethrollo7891]

Bit diffrent up here in scotland as we sark the roof so no need for the birds mouth on the seat cut, but basically the same..

[@ukconstruction]

I always wonder if just people sark there roof just across the border in England and does every roof get sarked in Scotland????

[@meirionroberts7963]

B.E.A Utiful

[@harrythomson2437]

Hi Robin, is your square available to purchase?

[@donaloconnor3352]

Is that rafter point mark on every framing square or just that one that you're using?

[@ukconstruction]

It's on my one

[@ukconstruction]

The one I am developing

[@donaloconnor3352]

@@ukconstruction I will be buying one if you ship to Ireland and also the fence if that comes with it

[@Elfin4]

Robin, where are you selling your roofing squares ?

[@ukconstruction]

This summer for sure mate!!

[@BillyMustang101]

Lay board angle the same as Jack edge bevel. True length CR - Run CR on square

[@ukconstruction]

Top of the class Martin

[@Sebastian-iw5et]

hey ChippyMart. can you dumb it down or explain in more detail for a novice like me?

[@dunkmich7042]

Where can I buy this?? Thanx

[@francishughes7856]

What's the formulae to work out the length geometrically

[@ukconstruction]

Half span less the ridge thickness multiplied by the hip/valley length per m of run

[@johnlasseigne7676]

Was really hard to see what you did at the bottom where you made the mark with the block

[@danthechippie4439]

What brand of nail gun was used?

[@ukconstruction]

This is a Milwaukee

[@johnchincotta1qwdb15]

Down to a T Robbin

[@Sebastian-iw5et]

Can any one explain me the math behind this? or point my to some source material that can? i understand what and why he is doing it. but i wanna understand the math behind it, and why it works to mark the roofing square like that

[@olafbigandglad]

I'm sorry, but I have to disagree on one point. In Canada at least, and I also have to assume the USA, a cricket is quite specifically the little roof that is built behind a chimney. Interestingly, that's where Walt Disney got the name "Jiminy Cricket".

[@pgaybrooks]

Robin, you have a different handsaw on every video; are you not fussed and go with whatevers on offer, or do you have a go to? Personally i don't like too much flex in a handsaw.

[@ukconstruction]

I will use any decent throwaway saw, I buy what is on offer!!

[@TheToolnut]

Draper handsaws are excellent I find, they have very little flex, 👍🔨🇮🇪

[@jordang4998]

Please let me buy one of your Squares 🙏

[@LostFaithMillenial]

If you figured that out thousands of years ago before anyone else and showed a bunch of people. They’d think you were the son of god

[@rossmorrow3013]

I’m sorry,…..to a point! BUT mash teachers, or mine I should say hadn’t a clue why they were hammering on about trigonometry and Pythagoras Theory and didn’t know what actual use it was in the outside world, just as they didn’t teach us anything about balancing a chequebook! End of math teacher bashing rant!

[@phil2544]

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