Hello

I am going to replace some old sleepers 150x150 with impregnated building timber 120x140. The old ones are lying directly on the soil. Should I put some sort of fabric underneath? Thinking that wood should not lie directly on the soil. Anything else to consider?
 
  • Old wooden sleeper next to a gravel path and lawn, with a garden hose lying on the gravel.
MrJay
Trees grow in soil, why do you think you need something in between?
 
MrJay MrJay said:
Trees grow in soil, why do you think you need something in between?
I read somewhere in a forum on byggahus that if you lay timber directly on the soil, it will rot sooner or later.
 
P
Choose impregnated timber marked NTR A, this one can withstand contact with the ground (for a while). AB is worse, avoid if possible.

Svenskt trä has a guide, type in "träskyddsklass ntr" or similar on Google and you'll find it. :)
 
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wicpe
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MrJay
Now, I'm no expert when it comes to such things, but that it's impregnated might be a bit risky. Found a PDF on just that subject from the Swedish Chemicals Agency, just read it :)
 
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P
MrJay MrJay said:
Now, I'm no expert when it comes to that, but the fact that it is impregnated might be a bit risky. Found a PDF on just that subject from the chemicals inspectorate, just read it :)
That was a step further than I was thinking. One is so used to treated wood that one doesn't consider potential effects on health and the environment, other than wearing gloves when it's still wet from the liquid.
 
W wicpe said:
Hi

I am going to replace some old sleepers 150x150 with impregnated construction timber 120x140. The old ones are directly on the ground. Should I lay some sort of fabric underneath? I'm thinking that wood shouldn't be directly on the ground. Anything else to consider?
Why not choose a material that doesn't rot if you're doing the job of replacing?
 
F fribygg said:
Why not choose a material that doesn't rot if you're going to do the work of replacing it?
Hi, yes, good point. Are you thinking of another option than construction timber? And if so, what? My thought was whether it works to place treated wood against the ground, if yes, then I plan to do that.
 
NTR A can be placed directly on the ground, but a gravel bed underneath and a weed barrier under everything is never a bad idea to make it last a bit longer.

Otherwise, if you can get hold of pieces of old electric poles, they hold up reasonably well since they are treated with something special.

I'm planning to expand the parking area at home myself and will use old electric poles I've managed to acquire as a frame to keep the gravel in place :)
 
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