Видео

This is the best video on subfloor I've seen. I'm about to replace a tongue and groove water stained and mouldy floor in my holiday shack. Thankyou for the info! Also need to reset some footing levels while I'm at it so that'll add some complexity.

That splice beam detail is essentially a mechanism, two mechanisms actually and should not have been agreed.... Also I need to increase my fees, by 100% seemingly

Having read the strong boys loading data and being a structural engineer, I concur.... they are pretty rubbish

Water is the enemy of buildings.

Instant subscribe❤❤❤❤❤ Excellent content

How do the roof vents work if outside air has moisture?

Great content on this channel thank you 👍👍

A builder put OSB on my pitched roof. Then Rockwool insulation was planed underneath it between the rafters and over the rafters. There gypsum board. The firts winter I noticed not only condensetion but ice forming on the inside of the OSB. I then stopped the guys that where working on the renovation. Since than in didn't find a solution other then doing my roof again removing the OSB...

You talk too low😢

Except video and advice, thanks for sharing 🏴󠁧󠁢󠁳󠁣󠁴󠁿👌

What would be the logic behind insulating between the ceiling joists with 100mm fibre glass and then insulating between the rafters above that ceiling with 100mm pir, breathable membrane on top of that, it very warm in the loft space and it looks like moisture is collecting in the eaves which is rotting the valley boards and flat roof decks attached to the above pitched roofs

I am currently working on a building that was constructed 12yrs ago and has damp issues to the upper floor ceilings, upon inspection it is found the grp covered flat roofs which could be described as some where between a cold roof and the hybrid, there is no vapour barrier and no ventilation cosequently the decking boards have completely rotted and also the joists have rotted through, also each flat roof is connected to a pitched roof in which 100mm pir has been installed between the rafters tight up to the underside of the roofing felt, laths and concrete tiles on top, bellow this are the ceiling joists with 100mm glass fibre insulation between them, this is a nursing home and as such it kept warm at all times which is evident when i remove a roof tile and lift out a piece of pir and feel the heat escaping. There is a lot of heat and moisture travelling up through the roof structure and so far i have seen little ventilation, i find it hard to believe building regs let this roof design pass, it was a dissaster waiting to happen, all the flat roofs need completely replacing or in this case as there is a 500mm high parapet wall round at least 3 sides of all the flat roofs so i can construct new roof frames over the old ones and negate the need for invasive repairs or opening up the building to the outside, to top it off all the plumbing, ducting, electrics are hidden above a suspended ceiling wich is hanging off the rotten flat roof joists which are boxed in with fire boards, nightmare really, i will have to suspend the old roof from the new roof and introduce plenty of ventilation to take away the moisture before it reaches the new vapour barrier

Hello, greetings from Ireland. I really enjoy your build videos and watch with interest the small house build. Will you be posting some videos detailing the fixing of the external pir insulation to the osb and detail of the junction between it and the warm roof insualtion. I have 2 extensions which I am planning on my own home this year and this detail would be really useful. Also is there a specialised pir for use outside the osb, I am thinking about fire regs here. Also do you use anything at the bottom of this pir to stop our little garden friends from burrowing in to the pir. Thanks in advance and please continue to produce your informative and enjoyable content, your sense of humour adds a lot too.

Where's the water suppression that's nasty there's no way we'd get away with that type of splice joint only ever used that on vertical columns only ever plate to plate to create a moment connection to prevent sag

Hi I’m building mezzanine floor with chip board inside my steel shed then framing around walls is it ok to frame on top of chip board as the walls are non load bearing and only 1.8 high max

All cavities should have a tray in and therefore has air vents, all be it small ones every two bricks…

Such a professional video with great drawings and explanations. Keep them coming Jerry!!

I’ve never seen a flat roof that doesn’t leek. When a flat roof is needed the code should call for a permanent railing or barrier around the perimeter and inspection access to the entire underside of roof.

First mistake is choosing a flat roof at all..

Hello. thanks for the informative videos. I have subscribed and opened the downloads link, but only seem to get PDFs when i click download on the concrete calculator spreadsheet. Is there another link for the XLS file please? cheers

Thank you for the helpful information - I am looking to use your detail (scottish flat roof extension with height restriction) I need 200mm of TR27 I contacted Kingspan for condensation risk analysis. Couple of issues arose. 1. they identified risk of condensation near roofing membrane. 2. they can only recommend build up with a layer of OSB sitting above the rafters. 3. the technician put their VCL above this layer of OSB. I explained VCL should be on warm side stepping over rafter as your detail. She wrote on U value calc "VCL not required in this location, added by customer". 4. Kingspan require more insulation above the rafter than between. So build up from Kingspan is roofing /130mm TR27 / VCL / 18mm OSB / 70mm Thermapitch between rafters/ cavity/ 12.5mm plasterboard. So Kingspan seem v reluctant to take on board your detail - any comments?

Amazing content on your channel, thank you! Would be interested to see how you would best detail the same situation, but against a solid stone (no cavity) wall...?

Can I use a different material in sheets, instead of the outer OSB layer.

Great video. Personally I can't understand why to risk and choose a flat roof in the climates where rain or snow are persistent.

The ridged insulation board idea to me is not good. In order to get good insulation there according to Passive House standards ie the best standards I’m aware of in the world (Germany). Air movement must be eliminated that sounds easy but in reality air will circulate unless accuracy of joints between insulation and rafters should be no greater than 1mm or 1/25 of an inch…. Having inspected many sites even with new construction I’ve found gaps as large as 5mm or 1/5 of an inch totally unacceptable. So I insist on supasoft insulation (recycled plastic bottles hygroscopically stable) and as a quilt totally fills the void. Supasoft is also vapour permeable and as such prevents moisture build up. Timber dec above a breatherbl/vapour permeable layer Elka strong board is exerlent, if flat a ventilation cavity required.

Grab lorries are cheaper than skips

Floor coverings?

thx for all your videos, your incredible knowledge and the hard work you put in sharing it. ❤❤ I keep on checking my project with your videos 😁

Great information and I love your delivery style. No bullshit. Thanks for your effort

"inner self" lol

Thanks for this, I have a "hybrid" dormer roof and couldn't work out whether it was supposed to be a cold roof or warm roof. Now I have a route to rectifying the poor installation.

Its good to finally see others with some pride and depth of thought to their work.

Hi, great video as always but I wondered what you make of this new video by Steve Roofer, who's pretty well regarded who argues that OSB on top his OK due to the fact that a good vapor barrier won't let moisture through to rot the OSB out, or that's what I believe he's saying :) many thanks. ruclips.net/video/kjQ9Zi2uMCw/видео.htmlsi=l7EIeMXwozyP9Bkt

Whats your view on External wall insulation on an old solid stone wall house?

I was under the illusion i needed 2x4" c24 Maybe it party depends how much insulation u want in the cavity?

Strange, I just did the training for Elevate (previously Firestone) and the official training had me going directly to the OSB. As for the contact adhesive, it is harder to manage on larger sections, but I found the spray much easier to apply with better coverage.

My god! Common sense at last! Great video!

Thanks

Hi Jeremy, i wonder if you've seen skill builders latest video on this subject and could tell me your thoughts? I'm trying to make sure i've designed all of the details prior to my build but its proving very difficult. Happy new year. All the best.

Really informative video, and a great reason to learn to use Sketchup. I can't find a free version anywhere, it must have changed since you made this. Couple od questions on your demo please. 1. Battons under the floor joists, what foundation base are you using, presume it's not a concrete slab? 2. In a couple of comments below you've mentioned concrete over insulation, do you think this is ideal in the UK or overkill for a 5.5m 3m garden office. Great vids.

These are videos for grown ups, devoid of sensationalist nonsense and backed up with clear, simple science and bags of common sense. I want to build an EcoBrix passive house and the videos are helping me get the right fabric design before a penny is wasted during build or in the years after completion. Great stuff, please keep it up.

Brilliant! This is exactly the type of info I had been looking for. I always thought the tapered insulation was difficult to come across for long roof spans, and it was a DIY type of solution. This is helpful.

Is 8m span too long for a roof joist

Thanks.. might want to give the cat some treats befoe your next vid 😊

How does one go about obtaining a completion certificate? For example when dealing with works outside the remit of the structural engineer etc.?

GREAT VIDEO ABOUT ROOFS...... could you do one about cantilevers and floor to ceiling bi-fold doors and hiding lintels in roofs please?

nice models. is that sketchup?

@build-better-things , Why cant you use insulation with foil and if you have foil can't I just pull it off?

Looking forward to discussing a very small kitchen roof extension in a few months time. Also a fan of Robin Clevett. Prefer to do the job myself - should be straight forward even with a warm roof.

Hi Jerry Many thanks first-of-all for your interesting videos. Looking at the video, what came to my mind is: How does the roof construction apply to warmer regions like mid/south Italy or Spain where summers are very hot (winters mild) . Would YOU build the roof the same as you demo in your video? Same insulation materials? Thx