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Reply With QuoteSimply place the cloth directly behind the wall, 2 layers would be better, but not necessary.
Where to put the silt cloth for retaining wall This might sound like a silly question but where do I put the silt cloth for a retaining wall. Do I put it directly behind the retaining blocks or put the crushed rock then the silt cloth then backfill. Or do I place it in between two layers of crushed rock (this is what I was thinking of doing). The retaining wall is only 3 blocks high so I may not actually need the silt cloth but I was given several meters from a friends leftovers so figure it can not hurt to use it.
Simply place the cloth directly behind the wall, 2 layers would be better, but not necessary.
thanks for that
If you have a single block wall the face can remain wet after rain and look unsightly unless you put a membrane against the wall - usually just Orminiod painted on. Then goes a membrane protection board (optional)- like coreflute, then your drainage medium, then your fabric then your backfill.
If you have a good thickness of crushed rock which doesn't hold water (not sandstone) and the site is reasonably dry you can delete the membrane, but I'd still put the fabric between the drainage and your backfill to stop the voids in the drainage silting up.
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Originally Posted by Bleedin Thumb
Thanks for that it sounds more along the lines I was thinking of. As the crushed rock is useless for drainage if full of silt and I am trying to avoid the silt washing out of the gaps between the blocks.
I just bumped into this handy diy series scroll down to stage 3 for info related to your question.
How to DIY Series: Link Block Retaining Wall Preparation Stage 1
DIY Series: Link Block Walls Drainage & Finishing Stage 3 The 'How-to' of building Link Block Retaining Walls. This Video shows the drainage gravel and final courses of blocks. Corners are covered in our next video
Hope it helps!
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GEO-MAT is designed to prevent damage to the DPL (bitumen coating) behind the wall.
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