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[trevors50uk]

When building a block retaining wall approximately 4 foot tall with soil behind to 3 feet does the wall need to be double thick?

[thedoctor]

Depends how thick the blocks are really Trevor! If you are using standard 4 inch blocks then it would be best lay them flat making a 9 inch wall.

[sparkyjnr]

[quote="trevors50uk"]When building a block retaining wall approximately 4 foot tall with soil behind to 3 feet does the wall need to be double thick?[/quote]

Did you build the wall? if so, single or double thickness? I have a similar job to do!