How to fill the gap between Colorbond fence and concrete?

Hello @karmadra

Welcome to the Bunnings Workshop community. It's fantastic to have you join us, and thank you for sharing your question about the gap near your Colorbond fence.

You have a few options available to you. You can either level the soil and build formwork as close as you can to the fence and fill it with concrete or use pavers to complement the pebblecrete. The other method is to put in some H4 framing in the ground and covering the gap with sleepers. I've placed a sketch below, to give you an idea of what it might look like.

I suggest having a quick look at this discussion - Re: Recommendations for gap along fence by @CookedBread.

If you need further assistance, please let us know.

Eric

https://www.workshop.bunnings.com.au/discussion/comment/26232#Comment_26232

Hi @EricL ,

Thanks a lot for your response. Your tips are very helpful.

Just another quick question. There are gaps at the bottom of the fence and the soil. What can I use to close the gaps? Any recommendations/suggestions?

Thanks.

https://www.workshop.bunnings.com.au/discussion/comment/75814#Comment_75814

Hello @karmadra

One quick way to cover the gaps is by using H4 treated 90mmx45mm. The label H4 means that it is treated timber and can make contact with the soil. Simply place the timber across the gap standing up and anchoring them in place using 50mm Sleeper Peg Galvanised Steel.

If you wish the timber to be level to the profile of the fence, it will be necessary to dig a small channel so that when you put the timber in it will sit flat and at level with the fence.

If you need further assistance, please let us know.

Eric

https://www.workshop.bunnings.com.au/discussion/comment/101723#Comment_101723

Hi @EricL ,

Thank you for your response and for your helpful tips.

I have been looking for H4 treated 90mmx45mm on Bunnings website but I am not able to find it. Is it something we have to go to the store and ask?

Thanks.

https://www.workshop.bunnings.com.au/discussion/comment/117820#Comment_117820

My apologies about the timber size. I should have mentioned to use 150 x 25mm 4.8m Plinth H4 Treated Pine Sawn Wet. I recommend calling your local store first to make sure that they have this size in stock. If it's not available, it will need to be ordered from the trade desk as a special order.

If you need further assistance, please let me know.

Eric

https://www.workshop.bunnings.com.au/discussion/comment/127209#Comment_127209

Hi @EricL ,

Thank you for your response. Really appreciate it.

Instead of H4 treated pine, is it okay to use H3 treated pine plinth (eg: sth like 150 x 25mm 2.4M Plinth H3 Treated Pine Sawn) instead, and then fill in 50mm pebbles between the concrete and the plinth?

Thanks.

MitchellMc

I'd recommend sticking with the H4 timber @karmadra. H3 timber is for use above ground and will quickly decay if it is in moist subsurface conditions. Even having the pebbles up against it is likely enough to begin the decaying process.

Mitchell

https://www.workshop.bunnings.com.au/discussion/comment/27022#Comment_27022

Hi @MitchellMc . Thank you for the detailed explanation. I have tried looking for 150 x 25mm H4 plinths in several Bunnings around my area, but they do not have them available. I have spoken with the staff at the trade desk to put in a special order for this but it is not available to be supplied.

Are there any other alternatives that you would recommend? Thanks.

https://www.workshop.bunnings.com.au/discussion/comment/76238#Comment_76238

Can you please tell me which stores are closest to your home? I'll get in contact with them and see if I can find you suitable H4 timber pieces you can use.

Eric

https://www.workshop.bunnings.com.au/discussion/comment/102001#Comment_102001

Hi @EricL ,

Th closest Bunnings is Craigieburn. I am after 150 x 50mm H4 plinths.

Thanks. 🙂

https://www.workshop.bunnings.com.au/discussion/comment/117992#Comment_117992

I called around the surrounding stores in the area and I'm afraid the 150x50 plinth is currently out of stock. However, I suggest going towards the next size up which is the 200 x 50mm 2.4m Treated Pine Sleeper H4. If you're not keen on cutting it down, all you need to do is to dig a shallow channel for the timber to sit into.

However, it is possible for you to cut the timber down if you need to, just keep in mind that the cut ends must be sealed back with TWA Woodcare 300g Ecoseal Tanalised Timber Treatment.

Please make sure to follow all the recommended safety procedures at the back of the can. I also suggest wearing UNi-PRO Large Hooded Disposable Coveralls along with gloves, goggles and a Trojan A1+P2 Half Mask Respirator.

If you need further assistance, please let me know.

Eric

https://www.workshop.bunnings.com.au/discussion/comment/127333#Comment_127333

Hi @EricL ,

Thank you for your recommendations and detailed information.

Just a quick question - if I buy 150 x 25mm H3 plinths and then paint them using In Ground Timber Protector such as Bondall 4L Monocel In Ground Timber Protector or Bondall 4L Inground Timber Protector, will that be an alternative?

Thanks again.

https://www.workshop.bunnings.com.au/discussion/comment/133480#Comment_133480