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Celcon Foundation Blocks can be laid below ground level without mortar perpends.
Simply lay them with mortared horizontal bed joints and then butt them together to prevent the passage of vermin.
Solar Grade can also be used below ground, All Celcon Foundation Blocks may also be used above ground, with appropriate finishes, for solid wall construction.
All Celcon Foundation Blocks may also be used above ground, with appropriate finishes, for solid wall construction.
Applications: Foundations and Solid Wall Construction
There's nothing wrong with these blocks but in hindsight I would have bought the ones with the hand grip mould. It's just trying to left them in place was a bit tricky when your restricted on space aswell in a trench. They also get much heavier if they have been in the rain.