How long would these last ?

forestboy · 10 Mar 2009

hi

Due to some pretty major site levelling and frost heave issues I'm in a tizzy about the foundations for my workshop.

I am thinking about sinking some wooden piers/pilings into the ground 2-3 feet. and using them as a support.

How does using pressure treated 4x4 timber posts, soaked in the good cuprinol/ronseal preservative stuff then plastered with bitumen/roof seal before sinking them sound?

How long do you think I'd get out of it?

It's the caravan adjustable jacks on paving slabs if that doesnt work!

Tnks.

swidders · 11 Mar 2009

Would have thought that since you'd be digging the holes anyway that concrete would be better - you could support your structure on brick piers then and avoid this ingress of damp.

forestboy · 12 Mar 2009

That's the preffered option but the site is very unlevel (is that a word?) and getting a digger and materials to it is a big issue

I was thinking about posts as a temporary and quick fix, then replacing them in situ at a later date.

ratman123 · 13 Mar 2009

If they are properly pressure treated with a copper based preservative to hazard class 4, then you could get them to last at least 15 years.

(If the timber yard just gives you a blank look when saying the above then they probably don't know how to properly pressure treat them).

any dip/brush treatment will probably last a few years as you won't get more than several mm of penetration on the treatment.

Symptoms · 13 Mar 2009

boy - use an earth auger (petrol powerhead & auger) to bore the holes to the approx dia of your chosen piles (as per rat's post) any gaps filled with rammed pea gravel or similar; hire this tackle for the day and, as it's not very heavy, hump it up to the remote site. Or, 'cos you might be in the countryside, tap-up a local farmer to drive up there with his tractor & post hole attachment to lend a hand.

Properly treated timber will last for donkeys.

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How long would these last ?

forestboy

swidders

forestboy

ratman123

Symptoms

DIYnot Local

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