PART 4 FULL GARDEN ROOM BUILD Roof Joists, Laddering and OSB How to build and fit

Part 4 of our full Garden Room build, on this video we show you how to join 5x2 timbers for a 4m roof span, fit laddering to the sides and then secure the perimeter lengths.
Thanks again for watching and please drop all questions into the comments box and I will get back to you as soon as possible.

[@zoars1]

Quality job gentlemen

[@TheNorthernmunky]

Awesome work, good video

[@ORGPPL1]

Props to the cameraman, filming while walking on an incomplete roof

[@clinicmanagertreeoflifecen3609]

Great videos, very well explained. Thank you!

[@creategardenrooms]

Thanks very much. Another full tutorial build being release on Sunday afternoon, stay tuned 👍

[@Waynes_Travels]

Great videos. I'm hoping to do a project like this this year so these vids are very helpful. I like the accuracy and attention to detail in your work, nice to see.

[@creategardenrooms]

Thanks very much mate

[@elliot8595]

That's so funny, I was just saying to myself 'great cameraman you've got there' then he goes in for the kill shot

[@creategardenrooms]

The drill knocked it out of his hands!!

[@ibbykhanuk7770]

Very nice 👌

[@creategardenrooms]

Thanks a lot 😊

[@Abidsalehuk]

Great work and please we are planning to do loft so any idea 7 x 2 timber or is it better to use 6x 3 . look forward to see more your video .

[@nickfraser1259]

Hi gents, thanks for the content. I'm really enjoying this series. By no means a criticism whatsoever, in act, it's refreshing to see a professional company building a garden room for what it is and not over engineering it like it's some sort of multi story car park. The difference I've noticed are; No mot type 1 sub-base. No steel reinforcement. No insulating under/on slab as of yet. Screws and plugs (baseplate to slab) usually bolts with chemical fix. Joist size not suitable according to span table. No joist hangers for rafters. As I say, not digging u out at all. In fact, I'm in agreement with alot of ur methods, I think it would save alot of ppl plenty of money, and enjoying watching this build. Would u say that the answer to all of this is just simply... Yes, it's a lightweight garden room, not a two story extension? Thanks chaps.

[@creategardenrooms]

Hi Nick, Thanks for the comment. I'll have to be quick as my tea is nearly ready!!! Concrete slab is basically a raft so even if part of the ground moved underneath the slab would be fine, you'd have to but about 100 tones on it to get it to sink!! No need to any sub base, over 50 years on construction in the family and we've never seen one sink. Not enough weight from a Garden Room or Shed. Base insulation video is to come, stay tuned! Fix a piece of 4x2 into concrete with one screw this way and try and pull it out, I bet you can't ;) If you do, fix 8 more into it like we have and I promise you it won't move. Doubled up 5x2 bolted are more than strong enough. Even with 2ft of snow the loads are spread over the whole deck and wall plates and will not flex enough to cause any danger. Joist hangers not needed for rafters. 50mm of screw depth into timber has a withdrawal force of nearly 180kg, we have 2 per joist so that's 360kg per joist at the front. We have 12 joists so that means you'd need 4.2 tones of wind to rip the roof off. I don't think that's ever happening on our 600mm overhang! And especially not in the uk where we don't have hurricanes. Thanks for watching the video and stay tuned to see how we put the rest together

[@nickfraser1259]

@Create Garden Rooms Ltd that's a great reply mate, appreciate that. Look forward to the next vid.

[@michaelfraser5723]

27:20 microwave towers and solar panels, typical of high density urban housing, but what do we do to provide protection in the sub planning garden room?

[@gavin-lv6tw]

Hi mate.. Really informative videos, i’m starting mine on Saturday, but after some advise on the roof joists.. my span is 6.8m what size timbers would you recommend? Cheers 👍

[@stuartmorgan5062]

Well done lads enjoying the videos, my garden room is a 3mx4m could I double them and put them 600mm centres? Thanks

[@creategardenrooms]

Could do Stuart but over a 4m span best to have them at 400.

[@Alastair-bc5ot]

Great work as always!! Do you have to use tongue and groove osb or is normal osb sheets ok

[@creategardenrooms]

T&g is better as easier to work with 👍

[@saferandquieteroads]

would double 5x2's work on a 5m span

[@d57fgp]

I’ve got a 3m span, was going to use 4x4 is that okay?

[@markpenniston]

Gr8 videos. Where do u buy the rubber from please?

[@creategardenrooms]

Avenir roofing in High Wycombe 🤜

[@user-zn3io6nl4v]

Enjoying the videos. Quick question. Is the roof completely flat? Or is there a drop etc?

[@creategardenrooms]

Roof has a 70mm fall 👍

[@mc1703]

How did you get the fall without firrings?

[@creategardenrooms]

@@mc1703 watch the video where we built the walls 😉

[@zafg2505]

Hi. Just wanted some advise. My span is 4m Ive got 6x2. Will single be enough or do I need to double them up? Thanks Looking forward to your next video 👍

[@creategardenrooms]

Best to just double up 5x2’s and bolt them. 6x2 may flex a bit. 6x2 will be absolutely fine structurally but if you walk on it and it flexes you may risk popping the plasterboard at a later stage which would be a shame!

[@zafg2505]

@@creategardenrooms Thanks buddy 👍

[@ramzanj2468]

​@@creategardenroomswhy bolt two 5x2 why not just get 5x4 in first place

[@joepritchard5407]

What would you recommend for 4.8m span, would the 5x2 bolted together be sufficient? Domestic project only

[@ramzanj2468]

8 x 4 no need to bolt two 8x2 that's not a good method

[@stezaftw]

Is there any reason I couldn't use single 4x2 for the roof joists on a smaller build (5 x 2.5m)?

[@creategardenrooms]

No reason really other than it being a bit tight for insulation. It should be strong enough however you do run the risk of it flexing in the event of snow which could pop the plasterboard screws. Very unlikely though but just a thought 👍

[@ramzanj2468]

Why are you bolting together two joists to make thicker joist why not buy the correct thickness joist? Cost would be more with two bolted? Is there a reason to do it like this? I have done lots of building works and would not do this. Also on another video you did a floating floor but bolted down the osb boards to the concrete below that leaves no expansion contraction room... No need to screw down...

[@Amansshed]

I suppose it depends on your roof covering. mine is mental so I used singles as well.. starting to think il double them up when i put the rubber on due to weight of the boards..

[@steveallen1333]

Did this garden room require planning permission? If it did could you explain the process please? Great videos by the way

[@dalecolver7150]

hi steve dont know if anyone replied to your comment but this garden room wont need planning permission as the total square footage is less than 30m2 and the total height is under 2.5m meaning it can be built under permitted development

[@jonhickmanmusic]

@@dalecolver7150 I thought that it needs to have planning if it is made of combustable materials, and between 15m and 30m? so this would need planning?

[@dalecolver7150]

@@jonhickmanmusic you can go up to 30m2 without planning permission even if its made of combustible material but it has to be 1m from any boundary up to 15m2 if its within the 1m boundary

[@jonhickmanmusic]

@@dalecolver7150 thank

[@Bro2Bro2012]

No fall on the roof? how is the water meant to run away with no fall?

[@creategardenrooms]

There is a 70m fall on the roof? Not sure what you mean

[@Bro2Bro2012]

@@creategardenrooms ah I see you created the fall with the front and back walls I assume?

[@creategardenrooms]

@@Bro2Bro2012 yes mate front wall is 70mm higher than the rear. Then the side walls are build on an angle to meet the slope 👍

[@alexanderbotterill7503]

is there any worry with sole plate getting damp as it sits on the ground level? How far above the ground level is the slab height?

[@creategardenrooms]

Thanks for watching! No chance of that happening at all. Concrete is normally about 4 inches above ground level and there is a DPM under the concrete and a DPC under the wall plate 👍