How to Construct a Lantern Roof

This is another episode following the progress of our two storey extension build. During this video of How to Construct a Lantern Roof we take you through the process step by step. Pete is initially setting out joists for a lantern roof and is then aided by Tony in fixing the perimeter noggins. Tony then explains about the roof lantern upstand and fitting that. Pete then runs you through how he went about creating a fall on a flat roof by cutting tapered furring strips. He explains about the use of 18mm hardwood ply and fitting it correctly using compound miter joints where necessary. Then Pete and Will set to completing the job.
PLEASE NOTE: we’ll endeavour to answer questions and comments as soon as possible depending on our work schedules.
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Music from Epidemic Sound and the KZbin Audio Library
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#ExtensionBuild #LanternRoof #Construction

[@tonyefc8423]

Excellent video. From the point of view of a retired joiner, it's refreshing to see good quality, consciencious joiners doing an excellent job, using correct materials.

[@justjacqueline2004]

Quality craftsmanship throughout from the Build with A&E team.

[@BuildWithAE]

Hi Maria thanks for your kind words all the best Tony 👍

[@gazzabowers1184]

It is awesome to see a whole firm being perfectionists ! Brilliant. Stay safe.. Gazza

[@anthonyellis5517]

Quality craftsmanship

[@ninjayx0245]

It's the little things, like cutting off the bolts on the coach bolts for the double joists, then ensuring no sharp edges by using a grinder. Then planing the top of the joists because 1 was a couple of mill proud. Nice to see craftsmen who still have pride in their work. Really enjoying your Vlogs

[@BuildWithAE]

Glad you're enjoying the videos buddy! Have a great weekend 👍

[@woody1380]

I know this comment is two years old but I wondered what the point of cutting off the bolts was. It seems pointless as they will be hidden in the ceiling and will never be seen.

[@bobmartin5101]

I enjoyed that. I hope you get to show the lantern fitting. Thanks guys.

[@BuildWithAE]

Hi Bob much appreciated on way soon all the best Tony 👍

[@richardbradley7988]

Another great one guys. Would have loved to see a lot more of the detail toward the end though. That last minute would of made a great 10 mins! 😁

[@BuildWithAE]

Hi Richard fair comment always good to know how we can make the videos better it’s key for me all the best Tony 👍

[@richardbradley7988]

@@BuildWithAE the videos are great! That’s the thing we just want more! 😁👌👏🏻

[@thetallcarpenter]

'extra faff but it makes a better job' That'll be on yer headstone Tony. Solid blocking noggins an inch of the blockwork = very happy sparks and plumbers. Shame to cover up those compound fall, and mitred firring's. Great job. Thanks for the video. 😃 Cheers

[@BuildWithAE]

Hi Del much appreciated have a awesome weekend all the best Tony 👍

[@1987pagey]

Next level craftmanship wish I had these skills

[@BuildWithAE]

Thanks for watching David, have an awesome week! 👍

[@brickrightbuildinglandscaping]

Hi Tony Going to look lovely when its finished .Interesting to see the falls etc on the roof section and the gully and how its all going to work . Have a good weekend Justin 👍

[@BuildWithAE]

Hi Justin It was nice to do with so many falls have a awesome weekend all the best Tony 👍

[@martinbrice9802]

Hi Tony I’m a builder myself just great to see the level of workmanship and knowledge you guys have. Really good team I hope your customers appreciate having you guys work for them. All the best 👍🏽

[@BuildWithAE]

Hi Martin much appreciated that means a lot to us all, have a awesome weekend all the best Tony 👍

[@TVsez]

Love this channel

[@BuildWithAE]

Hi TVsez we are glad to hear that all the best Tony 👍

[@anthonyellis5517]

A definite subscription

[@user-nz7ee3fi7o]

You fellas workmanship is phenomenal. I meed a quote for my extension roof if possible? Thanks.

[@martyglover4344]

I had to stop the video to check what fastidious meant😂 Superb as always! Have a good weekend guys 🤙🏼

[@BuildWithAE]

Hi Marty much appreciated have a awesome weekend to all the best Tony 👍

[@benclarkson4205]

Don’t be an egregious and facetious individual

[@benkimber8285]

Top class workmanship and teaching. Be interesting to see some content of your improvers/ apprentices learning the ways. 👍🏻

[@BuildWithAE]

Hi Ben Pete and Joe are in training, Joe did the floor video all the best Tony 👍

[@anthonyworthington6495]

Best carpenters on you tube perfection to detail,what would you call yourselves joiners or carpenters ?have a good week my friend👍

[@BuildWithAE]

Hi Anthony much appreciated but there are many awesome carpenters on KZbin, it’s funny I see myself as a carpenter it’s funny how we can get stereo typed to joiner cabinet maker I think it’s mainly the U.K. in a lot of countries a carpenter can do everything but it’s not the case here in the U.K. I do think that the trade is being diluted because of the Government making bad decisions in education training. Roger has a crack video on Building Material Fails but he speaks about a lot of things that should be addressed but don’t because the people In charge don’t understand the animal all the best Tony 👍

[@AJ-ds5gf]

Great work but at 6:52 the point about plywood vs osb for roofing is a common mistake: osb is designed for roofing where risk of condensation is present. The glue/resin in osb is a lot more resistant to water vapour. Unless you submerge both osb and plywood into water for weeks, plywood would dry out faster but that's just a point on paper and not a concern in real world roofing application.

[@BuildWithAE]

Hi AJ OSB is a great product but I have always used Exterior grade HW plywood it’s just me old man ways 😂 all the best Tony 👍

[@Jys71208]

Hi, is OSB more stable than wbp plywood, (ie less expansion and contraction). with the two flat roofs ive done the felt always seems to lift up at one edge when ive used ply, ive installed up quality polymer vapour barrier on first decking layer, celotex, then another ply decking , breather felt membrane layer, then felt and top felt, but still this issue of felt expanding on one edge. maybe i fitted the ply not tight. i hardly left any gap for expansion.

[@SteveAndAlexBuild]

Top job as always, watch them knees Tony 😬🧱👍🏼

[@BuildWithAE]

Hi Guys to late rugby and running not good, they always crack when getting up 😂 more fish oil all the best Tony 👍

[@SteveAndAlexBuild]

@@BuildWithAE 😁💊🐟👌🏼🧱👍🏼

[@thetallcarpenter]

My knees hurt a little when I watched him fixing that lantern upstand. #hightibialosteotomy👨‍🦯 😫

[@garethheathcote4988]

@@BuildWithAE mate my knees started cracking when I was getting up around seven years ago, it is a definite sign that they will go in the not too distant future. I have been doing pretty intense physiotherapy for the last couple of months as my left knee ended up really bad. Please get someone to teach you the exercises now before you get too far down that road. 👍😀

[@Ultimate-roofing-square.]

Building to a high standard as always Tony. 👊🏻. Looking very nice. 😉

[@yorwerthedwards1045]

Brilliant job guys your attention to details are awesome 🏴󠁧󠁢󠁷󠁬󠁳󠁿👍

[@TheKaptainkraig]

Your company does excellent work and everyone cares about doing a great job. It is almost impossible in the USA to find a contractor like A&E. As a professional engineer, I like your construction methods with the full dimensional lumber and those low density masonry blocks. Looks very solid. I have not seen masonry products like that before. That addition will easily last for 100 years.

[@BuildWithAE]

Thanks for watching Craig! 👍

[@colingreen4625]

Great workmanship...pleasure to watch!

[@BuildWithAE]

Glad you enjoyed it IP! Take care 👍

[@whiteycantley]

Building control insist I use joist hangers and sheradized twist nails on every flat roof / lantern I do, toothed washer plates for bolting beams together too. Just goes to show regs are so varied throughout UK. Nice job though lads 👍

[@BuildWithAE]

Hi Whitey Cantley very true, we always use the paslode twist nail gun and nails when required all the best Tony 👍

[@MrJohnnynapalm7]

Great quality teamwork 👌👍

[@chrishyde5995]

and joist hangers around the hole

[@taylorthebeatboxer8062]

I'm glad u said it the trimmers need hangers

[@isabelmariavalades1407]

Fantastic video you should come over to my Country and teach and show a trick or two and show how a real craftsman works you are a true professional ⚒🔧👍😃

[@BuildWithAE]

Maybe one day! 😃👍

[@ellendove512]

I’d love to know what this looked like inside once it was done. You have some big steels so it was open plan but also some pillars for the steels to sit on. I think this is exactly what we need. Please can I see the inside?

[@BuildWithAE]

On way

[@amazing451]

Hi Tony great to see you back can you just explain where the 6 falls are on the roof as the video was to quick to keep up and despite looking at it several times I can only work out 5. However your all doing your usual great work just need a little more detail on some points in the videos. Keep safe and have a good weekend.

[@BuildWithAE]

Hi Kevin I think it’s something we have to work on a bit more detail for people, actually there is 7. 2 at the back, then 1 on the one side, 2 on the other opposite side a fall down and fall into the lantern from the front, 2 either side of the gully all the best Tony 👍

[@amazing451]

@@BuildWithAE Thanks for your speedy reply you obviously keep yourself a busy man at the weekend

[@jonnorris7564]

Nice job boys

[@krbuilders4685]

Loved the work guys I’m doing something similar stay safe guys

[@jlewis1688]

looks good Boss, an Elephant could drop from the sky and your flat roof would be fine Good strong job.

[@michaelscott9773]

As always a really Brilliant job.

[@lesterjames3008]

Brilliant to watch and really genuinely good wood working practice ,my only issue is with your short frame upstairs I would prefer to go past the ends of the longer frame to create a cross lapping affect but that's a personal preference not a criticism honestly ☺️

[@SD43]

Quality work as ever Tony and team, it's looking bob on mate. Hope Jon is ok, is he grounded?

[@BuildWithAE]

Hi Steve John is well it’s just we have a back log of other content from the other project but he will be back soon all the best Tony 👍

[@Snow-ql9sc]

Cuts bolts off with rip saw and then grinds them smooth, in stead of just using the grinder to cut in the first place. I'm interested if its the prices they charge their clients or the money they make from the videos that lets them be able to afford to do works to this degree. Still great to see things done how they should be. would love to be able to take my time like this and put love into a project.

[@BuildWithAE]

Hi Snow I think for me personally it’s a time thing, doing one right helps to do the next phase easier and more efficient. Many a time I stand back and think about this phasing things in a certain way, years ago I used to see people do something then moan later saying I new should of done thus to make my life easier or pick up the wrong tool and just make do. Prices are something we don’t discuss but never been short of work even in the bad recession, until 18mths ago I didn’t have a website absolutely nothing just word and mouth, the other thing which is key in any project is everyone teamwork it so important in the build process brickies, plumbers electrician plasters scaffolders, used to work on big sites many moons ago and everyone was at each other and why, the way I see it and been trained never compromise love what you do with passion all the best Tony 👍

[@ultim8brickie]

Should have used jiffy straps/ joist hangers on those trimmers

[@arshadmahmood2955]

Amazing work lads keep it up 🙂👍✌

[@nikkion2140]

This is done for a flat roof. Please, forgive my ignorance. Can you tell me if this can be done for a slanted roof. Thanks. God Bless.

[@Goodwithwood69]

I would go for osb on a roof any day, ply can de laminate, with hot weather fluctuations, even if water doesn't get to it.

[@BuildWithAE]

Hi Matt OSB is a great product but I still love to use External HW Plywood it’s just me all the best Tony 👍

[@imiles5548]

thumbs up

[@py_tok5589]

nice one, buildability wise

[@diyidea3031]

Mister Profesional- bolt must bee stick out of the nut on 1 diameter of bolt for good security, can't cutting the bolt evenly with nut.

[@jimgeelan5949]

You don’t here many builders using the word fastidious in this day and age 😂

[@ryanyoung9932]

What’s a ball park figure for this type of work done to a complete on the roof opening to the window installed and sheeted 🤩 thank you!

[@BuildWithAE]

Hi Ryan I would say about 20 to 25k potentially 30k depending on cover finish have a awesome week all the best Tony 👍

[@adam_lux4691]

Awesome vid!!!!!

[@BuildWithAE]

Glad you enjoyed it Adam 👍🏼

[@vaper106]

Can I ask, the joists are sitting directly onto the block work, no plate. Is that normal and ok to do?

[@garvielloken3929]

Does the upstand have to be totally flush with the inside of the lantern?

[@dwayneharris4787]

How do you figure out what the height of the brickwork should be so that the ceiling of the existing and new ceiling line up together perfectly??

[@Reverend-Rodger]

Bostin job! 👍🏻👍🏻

[@Jaaammmbbbooo]

Why did you not have to joist hangar the double trimmers

[@BuildWithAE]

Hi MRJTUK the load has been transferred to the main load trimmers the small trimmers are takings minimal loads it is also has turbo screws connections, it’s not a structural connection to then take further loads ie floor joist, Stairwells Chimney Stacks, the one thing I do find and have seen many times that people don’t use the correct nails for the hangers all the best Tony 👍

[@Tony-InLosAngeles]

Spent more time cutting and grinding bolts than the seconds of actual showing “how to build a lantern roof” The work is always excellent... just really didn’t get to see it.

[@BuildWithAE]

Hi Tony fair comment all the best Tony 👍

[@alexbekele8945]

Yeah same good video. But was hoping for more info height of upstand, squaring up, working out the furring etc

[@BuildWithAE]

@@alexbekele8945 sorry guys I should of thought about this one a bit more next time got three coming up all the best Tony 👍

[@alanbolster2590]

Yes ,l thought the same, would of been good seeing more about the furrings.

[@BuildWithAE]

Hi @@alanbolster2590 will be doing a video on them all the best Tony 👍

[@chekymonkey4452]

looking good

[@chrishyde5995]

hi how come you are using coach bolts were we are you have to use hex bolts dog washers and square washer both sides of the joists

[@HaroonAshraf]

Agree, would have used hex bolt with square washer plates both side. And left some thread on the end of the bolt.

[@northeastcorals]

I'd love to know what blade your using on the recip saw to cut down the bolts, I tried doing the exact same thing when re-roofing my house & I was averaging 2 or 3 bolts before the blade was completely knackered! I tried Dewalt blades & a couple others before I gave up & got the grinder out as it was getting expensive.

[@martincraggs1162]

Great attention to detail.. The joiner on our 3x1.5 lantern has built the opening to exactly that with tripled up joists.. according to the instructions it should be 138mm smaller. Is this going to cause an issue and would you rectify this without ripping the hangers off. Cheers!

[@dariuszbury7421]

Hello it is warm roof or cold roof? Where insulation going, where is any ventilation if it is cold roof? Thank you

[@monwil3296]

Much appreciated 👏👏👏 ❤️💯

[@Solihul886]

What's the reassurance that the roof lanterns don't collapse? Is the base built around the roof? Gets me scared thinking about it.

[@garvielloken3929]

Nooice!

[@georgethompson997]

Really professional and conscientious people, but you made a few fundamental mistakes that you should correct. 1) You need joist hangers at all right-angle connections between timbers fixed with twist nails - this skew screwing is completely wrong (especially around the trimmed opening), and is actually a very weak joint. 2) You should be using timber connectors (spiked washers) between bolted members - it's the connector that allows the individual timbers to act as one. Also you shouldn't pull in the head of the bolt so deep. 3) Your drawing may show what you've done is correct , but notching joists into RSJ is not now considered to be not good practice. They want you to fix a timber along the length of the RSJ and fit the joists on hangers. You can see you've had to notch out quite a lot of your joists depth to get them into the RSJ - thus reducing the joists load capacity. Not withstanding what I've said you are clearly a cut above the average carpenters operating today.

[@hughwilliams8062]

How high to you make the upstand please

[@BuildWithAE]

Minimum 75mm after finished roof

[@mrboyban]

That was a nice coffin.

[@CDLANEY1520]

No joist hangers??? .....or did I miss them.

[@BuildWithAE]

Hi CDLANEY1520 only required when takings loads all the best Tony 👍 have awesome weekend

[@CDLANEY1520]

@@BuildWithAE I have been a Joiner 45 years. It has a load on it, when you walk on it.

[@georgethompson997]

@@CDLANEY1520 Yes, it does require joist hangers. There is ALWAYS a load on the roof - 1) the load of the roof itself. 2) the load of snow, 3) other external loads, e.g. scaffolding from future works. NHBC and Building Regulations require the use of joist hangers on right -angle connections of timbers. Years ago the carpenter would cut a tusk tenon, but nowadays the hanger is the correct method. Screws are actual a very weak method of connecting timbers together like this, as in fact screws snap (because they're hardened) much easier than you'd think. When fixing roof timbers together (not in this application , but generally) the nail is a much superior fixing.

[@CDLANEY1520]

@@georgethompson997 Well George, showing my age now....but I have actually done a few Tusk Tenons in my time! ..Obvious it needs joist hangers.

[@thetessellater9163]

What, no steel joist hangers on the trimmers?

[@BuildWithAE]

Hi the tessellater not required all the best Tony 👍

[@tomthumb1769]

Hi I like the content you guys always make a cracking job. I’m just starting my own building company and just wondering if you had any pointers or tips about pricing jobs. I’ve 30 years in the trade as a bricklayer so know the job my only anxiety is about getting the pricing correct. Keep up the good work 👍👍

[@BuildWithAE]

Hi Tom starting a company is not about pricing its a very tiny part of the bigger picture. Please watch a video by Justin of Brickright building and Landscaping he’s on KZbin really cool guy he talks about all the consideration of running a business, really sound advice. 1, Overheads, these are things like Insurances on every thing, mobile phone, clothing, etc etc huge list add these up and Break them down into a day amount ie £3000.00 divide 365 days. 2, How much money are you going to charge a day, if you get say £180/ day you then add on profit to cover your overheads and then still have profit when overheads have been paid this is we’re people make a massive mistake never charge day rate with out profit. First impressions to clients. Pricing a job break it down into sections like footings, drains, brick to DPC, Ground slab, Super stucture to first floor then to Roof, then Roof, scaffolding there are also independent Estimating online companies that will do a full Bill of costing for a small amount of cost and also some merchants Please watch Justin on KZbin I wish you all the luck and best in your new venture. All the best Tony 👍

[@tomthumb1769]

@@BuildWithAE thanks for the reply most appreciated I’ll check out Justin cheers tony 👍👍

[@SteS]

Any reason for not going with tapered insulation to remove the need for furring strips? Times money and all that.

[@BuildWithAE]

Hi Stephen to many falls all the best Tony 👍 have a awesome weekend

[@agasservices3757]

Hi great job, just interested to know about cavity trays above your steels, just did a job recently with them and weep hole above lead flashing line as they were on drawings. Or does it depend on local building control. Keep up the good work 👍

[@garethheathcote4988]

You mean the steels that were installed to hold up the rear of the existing house? I think that strictly speaking cavity trays should be installed and for it to give any water a route out though a lot of builders just don't bother. Really you should always install a cavity tray when you create a new opening in an existing brick built structure. 👍😀

[@BuildWithAE]

Absolutely spot on all the best Tony 👍

[@jamesliu327]

That is hell lots of timer really necessary?

[@myatix1]

Is that a cold or warm roof?

[@coops6621]

Do you simply use a circular saw to do the firring taper cuts? Also I take it this is a cold deck as I saw the roofer on it already at the end?

[@BuildWithAE]

Hi coops66 warm roof Alutrix then Kingspan TR27 then with Resitrix, yes with the firings 9”Makita circular saw then bench power saw and work off the other side of the timber all the best Tony 👍

[@coops6621]

@@BuildWithAE thanks

[@coops6621]

@@BuildWithAE would be great to see the install of these products!

[@TomTomTomTom538]

How do you get airflow to the parts of the roof behind the lantern?

[@SteS]

Warm roofs don't need it.

[@TomTomTomTom538]

@@SteS ah I must have missed that it was a warm roof

[@Carl-yu6uw]

Any pro tips for cutting firings you can share please?

[@BuildWithAE]

Hi Carl the best way I find 9 x 2 x C24 ping your chalk line fall cut with hand power saw then cut the second piece with bench saw by setting distance and then do stage one again ping chalk line hope this helps if not I can do a IG on Instagram for you all the best Tony 👍

[@Carl-yu6uw]

@@BuildWithAE Cheers Tony! Just had my lantern roof design signed off by BC - looking for tripple trimmers so gonna be fairly expensive with timber prices scooting up and really don't want to screw anything up!

[@BuildWithAE]

Hi @@Carl-yu6uw at £320 a cube now I was paying £275.00 a cube two months ago

[@keithwiddows2391]

@@BuildWithAE just had an email from most of our merchants and they all seem to be putting 15% on most products at the end of February. That’s a big jump to pass onto the customer.

[@JDalston]

Whatd you cut the bolts flush like that for?

[@BuildWithAE]

Hi Josh stop ragging your hands makes the insulation push in nice and neatly all the best Tony 👍 have awesome weekend

[@JDalston]

@@BuildWithAE cheers for the reply mate, love your videos, keep up the good work.

[@tubbycarpenter9847]

Hi Tony is that the 10.8 or 18v festool drill?

[@BuildWithAE]

Hi Tubby Cab I have both the torch on both are incredible but the only reason I purchased that type of drill was comfort it’s balance is awesome and you hand is central to the drive all the best Tony 👍

[@mickgreen8672]

Tony what is the roof construction is it a warm roof you're putting on

[@BuildWithAE]

Hi Mick yes it’s a warm roof Alutrix vapour barrier then kingspan TR27 then finish with Resitrix all the best Tony 👍

[@mickgreen8672]

@@BuildWithAE cheers for your reply Tony I was only asking because I'm doing the exact same in about 2 weeks time with a Lantern and a flat roof warm roof system keep up the good work great videos

[@denty32]

@@mickgreen8672 hi Mick use the spec Tony described above, it’s in my mind the best Vapour control(Alutrix600) on the market fantastic insulation and a top quality Single ply. But then you wouldn’t expect anything less from a top quality outfit like A+E.

[@mickgreen8672]

@@denty32 Alutrix600 yes that is the Vapour barrier I use I get it from rubber4roofs and I'm putting one full rubber membrane on I think Tony's putting the strips and where you have to join them

[@BuildWithAE]

Hi @mick green the Resitrix is a awesome product we stoped using rubber even thou it’s a brilliant product and a lot less costly, the hot weld is the way forward I know Tom well top bloke mention my name and he will look after you all the best Tony 👍

[@richard4973]

Hi. Does your company build houses in London?

[@BuildWithAE]

Hi Richard yes we do but it wouldn’t be very cost effective by the time we have paid for Hotel and additional fees, could I suggest a company called Asheville Aggregates or Robin Clevett they are both on KZbin all the best Tony or the FMB 👍

[@Rayner01100]

Hard hats ??

[@joedefloat7802]

Does the roofer not get any credit for the hoovering ,shame on you tony.😎👍👍👍

[@BuildWithAE]

Hi Joe I must confess we both like to hoover in fact we all do he just got there first all the best Tony

[@solstar4778]

Why construct a lantern room ? What is a lantern roof ?

[@noahproblemo1257]

A&E, the contractor everyone hopes to find and not like the guys that show up two days a week and use a half empty bottle of vodka as a level.

[@stevedavis7303]

No dog tooth washers ?

[@BuildWithAE]

Hi Steven you can use Tooth washers but there not required for this application all the best Tony 👍

[@Ratsotone]

I've noticed your videos don't have that much informative content, it's more a case of "this is how we do do it" and not so much of, this is how to do it...But I suppose it's good advertising for your firm, and of course you pick up a lot of the usual arse kissing comments along the way

[@BuildWithAE]

Hi Green Genes if you look at the content on the channel 95% of the time we go into full detail but on this occasion I didn’t get it spot on with instructions but you have to understand or not we have to get the work done, earn a crust and try and film and we can’t always get it right. Regarding arse kissing comments well that’s your point of view and we have to respect that but do you think it constructive, received in a proactive way but if it makes you feel better then give yourself a Pat on the back. Actually maybe you should have a go at filming and share what ever knowledge you have all the best Tony 👍 have a awesome weekend

[@Ratsotone]

@@BuildWithAE Oh I'm sorry that you thought I came across as being proactive...hey, it was merely an observation...but I wasn't aware that my comments were meant to be constructive (I must try harder). And as for you suggesting that I do some filming myself, well in all honesty, I really couldn't be bothered, or in fact find the time to do that, but apart from that, I'm probably not as conceited as what you are...enjoy the rest of your day. Over and out

[@vespagd67]

@@Ratsotone couldn't be bothered but you have the time to slag some one else off that is making time to show how they do things

[@Ratsotone]

@@vespagd67 point out where you claim I was slagging someone off, my comment was based purely on an observation, and that's my opinion. But the fact is, if you're going to put yourself out there like these guys do, then surely you have to expect some criticism...