DOUBLE WOODEN CAR PORT BUILD

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Staircase pack out nearly finished, arrives in 2 weeks.
Flooring boards ordered, just looking at options to moisture proof flooring exposed car port below.
 
Staircase two part winder prep, just treating the wall sides at this stage with exterior varnish.
Will then spray underside with Roxil waterproofer, then topside and facing side of stringer with the same exterior clear cost varnish. It gets very damp up here!
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Very very nice!

I had a garden room built and due to the size and proximity to the neighbours I would have had to paint fireproof goop on it aswell so I just moved it further from the boundary.
 
I ache all over, just got out of a hit bath feel much betterer. Todays adventures, bit of 'slation' and stirs install.
I'm proud to have such good friends to lend a hand.
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Stairs went well, the usual dry fit and take down about 5 times, and fooking about with wedges etc but we got it sussed and cracked on the A team theme song and got it done, stopping for the obligatory sausage BBQ lunch with hot sauce, then within the hour all placed multiple entries for death fart of the day, i thought one was a bad batch of glue......it burnt my eyes...o_Oo_Oo_O:vb-bouncy3:
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Job done dogs finally allowed out, for some reason they love a wooden wedge, so best kept out of the way, we started at 09:30 all done by 18:30, in the bath by 7pm beer o'clock now....
 
Stairs x3 coats of varnish done, undersides sprayed with 3x coats of Roxil.
Roof is double layered, Twyvek houswrap plus Rhinovent roofing membrane due to reasons.
Floor space is 32sqm (Ashla wall to Ashla wall)
Approx 8m x 4m
Stud wall in pic two coming out.

1st floor board and close in, wiring etc next....
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Top landing P5 caber fit with Spax Wirox TX 4.5 x 60mm and Poly flooring foam / glue, cleans off perfect, just peels off.
I need high moisture resliance for this section of the floor.
My mates comment on Sunday eve "Ok so it looks like the mother of all Bukkake parties"

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1988smithy said:
Just read this from the start, when I need my range in the air I'm driving to Kent 🤣 well done, looks awesome. V v v jealous!
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Thanks Mate, i thoroughly enjoyed doin it with my pals, we laughed a lot as we get older we dont see enough of each other so this has been great fun, seems like school was only yesterday, not much has changed with us other than we are we all over 50 lol
 
When building something like this do you have to take into account expansion and contraction of the wood frame during the different seasons?
 
flat said:
When building something like this do you have to take into account expansion and contraction of the wood frame during the different seasons?
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To some extent but it depends on the timber type, structure type and the treatments applied to the timbers.
So as long as you ensure your materials are correct for the intended application you will be fine.
For example there are 12 strength in timber grades in the BS 5638, C16 and C24 standards are by far the most common. C16 CLS is fine for interior framing, however on this application I used C24.
C24 timber is most commonly used for external construction projects like barns / decking and shed bases.
All the frame was then treated and sealed with a 2 top coats of waterproofer and preserver. This was done before closing in, sheeting and cladding.
Also as this is an open contruction, it will have plenty of ventilation and no heat / moisture source and temperature variation in relation to the ambient, so again well within tolerance. Stick frame and roof was up around Jan, not sheeted in and tiled until end of summer and it was very hot last year, so its well settled now, no cracks and no noises.
All expansion and contraction is related moisture content in the wood, the tighter the grain the less water can be retained, add to that pressure treating with chems that effectivly boil off the water content, then the permiable top coat wrap you minimise this.
It will move, but overall not enough to cause any concern, in actual fact the strongest part of the structure is the OSB.....
 
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KISSMYAURA said:
To some extent but it depends on the timber type, structure type and the treatments applied to the timbers.
So as long as you ensure your materials are correct for the intended application you will be fine.
For example there are 12 strength in timber grades in the BS 5638, C16 and C24 standards are by far the most common. C16 CLS is fine for interior framing, however on this application I used C24.
C24 timber is most commonly used for external construction projects like barns / decking and shed bases.
All the frame was then treated and sealed with a 2 top coats of waterproofer and preserver. This was done before closing in, sheeting and cladding.
Also as this is an open contruction, it will have plenty of ventilation and no heat / moisture source and temperature variation in relation to the ambient, so again well within tolerance. Stick frame and roof was up around Jan, not sheeted in and tiled until end of summer and it was very hot last year, so its well settled now, no cracks and no noises.
All expansion and contraction is related moisture content in the wood, the tighter the grain the less water can be retained, add to that pressure treating with chems that effectivly boil off the water content, then the permiable top coat wrap you minimise this.
It will move, but overall not enough to cause any concern, in actual fact the strongest part of the structure is the OSB.....
Click to expand...
That’s fascinating thank you, does the wood move less over time? I have in my mind that the hollow fibres of the wood expand and contract but gradually over time ‘settle’ and that the movement would diminish with time?
 
flat said:
That’s fascinating thank you, does the wood move less over time? I have in my mind that the hollow fibres of the wood expand and contract but gradually over time ‘settle’ and that the movement would diminish with time?
Click to expand...
Not enough to worry about they way i did it, its all about managing the misture content to a the right level as best you can. Im no expert, and not a builder! but did my research and its worked fine for me over the years. I built a wooded frame double skinned music studio in the same way, no movement and its dry as a bone inside..
 
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