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How to make sturdy wooden edging?

lfckop5
Building a Reputation

How to make sturdy wooden edging?

I am in the process of redesigning my back yard. My goal is to make really strong and sturdy wooden edging which won't warp. I had some edging in this home when I moved in and if the timber was 2cm thick that's probably being too kind and the stakes were short, small and pretty pathetic. It warped and completely dislodged within 12 months. 

 

I have now manually edged my lawn to the shape I want it(see attached pictures) and my plan is to use 50mm thick treated pine sleepers for the edging and possibly some timber posts cut to 500mm in length for the stakes to solidly hold the sleepers upright in the ground  and for a long time. 

 

I will need to join sleepers together at 90 degree angles as i turn corners and also join sleepers in straight lines as some of my lengths are over 4M long. 

 

Could I ask for some advice on:

1) the best material to use when joining 2 sleepers together in a straight line and at 90 degree angles(I was thinking a timber post could be used but there may be something better to achieve this?)

2) which timber screws would you recommend for this project?

3) any other advice you have for me would be most welcome as I am handy but have never done this before.

 

Thank you. 

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Noyade
Kind of a Big Deal

Re: How to make sturdy wooden edging?

Hi @lfckop5 

 

"Could I also ask if painting the posts and edging will assist in preventing warping?"

 

Personally I would think not. They're evil and will warp as they dry out with tremendous strength unless 'tamed' with strong anchoring. Sounds like horse breaking. Yeee Haaa. 😁

Noyade
Kind of a Big Deal

Re: How to make sturdy wooden edging?

I foolishly made an outside workbench by lashing five 2.4m wet sleepers together many years ago and attaching two welded leg frames at the end.

As they dried with each successive hot Aussie summer - the whole thing warped to the point the bench rocked on two diagonal legs. Eventually it took around 50mm of packing under one leg to keep it from rocking.

Disgusted, to tame this I welded threaded rod onto two large concrete bolts and with a piece of steel plate slowly turned the nuts such that the leg "returned to earth." A lotta creaking from the sleepers resisting the counter-force, but in the end I won. 😁

 

The Sleeper Whisperer.The Sleeper Whisperer.

lfckop5
Building a Reputation

Re: How to make sturdy wooden edging?

Hi @Noyade . That's crazy. It's a full on operation to stop the warping. I have a 3m long and 250mm thick piece of treated pine which has been half submerged in the ground for 4 years and it hasn't moved. Maybe the moisture from the ground helps with the warping. 

 

Thanks for the advice. 

EricL
Bunnings Team Member
Bunnings Team Member

Re: How to make sturdy wooden edging?

Hi @lfckop5

 

I wouldn't recommend painting the sleepers as the chemical treatment on them will slowly come out and push the paint right off. Since timber is a natural product the warping comes from the fibres inside the timber when they dry off they shrink and pull the other fibres with them causing them to warp.

 

If your timber piece happens to be close to a heavy moisture area it would naturally hold back the warping as the water keeps the fibres from drying out. I suggest measuring the depth of the timber pieces you'll be screwing together, just keep in mind that the Zenith Treated Pine Screws do come in shorter lengths.

 

If you need further assistance, please let us know.

 

Eric

 

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lfckop5
Building a Reputation

Re: How to make sturdy wooden edging?

Hi @EricL . Thank you for the information. All my pieces will be partially submerged in the ground so definitely near a moist source. This explains why the 250mm × 3m long piece I have has not warped at all (and It faces north west too which means extreme sun) over 4 years. 

 

My total thickness when joining the edging sleeper and post sleeper as mentioned will be 100mm. So that's why I bought 75mm treated pine screws which should join them well. The next size up is a 100mm screw which may ever so slightly pierce the edging sleeper hence why I went with the 75mm screw.

 

Thanks.  

lfckop5
Building a Reputation

Re: How to make sturdy wooden edging?

@EricL @MitchellMc well the Melbourne weather sure has thrown a spanner in the works as far as this project is concerned. It will however get better on Friday and I plan to cement the posts(I am using 50mm thick sleepers cut to 500mm lengths for the posts/support/anchor for this edging). 

 

One thing I am a little worried about is the cementing itself. I have bought Bastian quick set cement(red and white bag) so will look to pour this around the posts/support sleepers before adding water. Do you have any advice how to secure the 500mm long supports/anchors in the ground so they remain exactly in place while I pour the cement and water around them and allow it the time it needs to set without moving? Of course I want to get this right and it seems to me that it is the trickiest part of making this edging as they need to be in the right area and aligned with the others in the row before I can cement them. Once the posts are cemented in the right place the sleeper lengths will be easy to install. 

 

Thanks for any advice you can provide. 

 

Regards 

 

Elton 

EricL
Bunnings Team Member
Bunnings Team Member

Re: How to make sturdy wooden edging?

Hi @lfckop5

 

My recommendation is to use a builders line to make sure your posts are all lined up. To keep the posts in position, I suggest nailing in some timber offcuts to brace them into position. Just make sure that the timber braces are firm enough to keep them in place but easy enough for you to hammer off. Please remember that you will have time to adjust and line up the posts as the cement settles in.

 

If you need further assistance, please let us know.

 

Eric

 

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lfckop5
Building a Reputation

Re: How to make sturdy wooden edging?

@EricL many thanks. I shall certainly use the builders line and offcuts as suggested. This weekend is the big weekend where it's all happening so I shall be in touch with some photo's once all is complete. 

Re: How to make sturdy wooden edging?

Another technique I've seen is to attach a piece of timber horizontally to the post. The advantage of this is that you can have the post hover above the bottom of the hole, thus ensuring concrete wraps all the way around it and prevents rot from the bottom. Just ensure the edges of your hole are high enough so the top of your post lines up with the string line.

EricL
Bunnings Team Member
Bunnings Team Member

Re: How to make sturdy wooden edging?

Hi @TheHandySqirrel

 

That is another excellent method to hold the posts in place. Let me tag @lfckop5 to make them aware of your suggestion. Having the post floating in the middle of the cement foot will definitely make the post last longer.

 

Thank you for sharing such a great suggestion.

 

Eric

 

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