The larger particles shown in the first photos of the existing brickwork don't look extremely large for some building sands. All you can really do is check around at different merchants. Places like Jewsons normally stock only a few sand types, but lime suppliers usually carry a lot more. Their building sands are usually sharp because with a lime mortar it's still workable.
Sharp sand refers to the shape of the particles, not their size.
Coarse means large, fine small.
Well graded means all different sizes.
When pointing stone for example a coarse sand would be used, as a fine sand wouldn't have enough body in it. For small joints a fine sand would be required.
When using a cement mortar a soft sand is needed to make it workable.
With a lime mortar a sharp sand can be used.
Sharp sand refers to the shape of the particles, not their size.
Coarse means large, fine small.
Well graded means all different sizes.
When pointing stone for example a coarse sand would be used, as a fine sand wouldn't have enough body in it. For small joints a fine sand would be required.
When using a cement mortar a soft sand is needed to make it workable.
With a lime mortar a sharp sand can be used.
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