My partner is still doing the finishing work after changing our windows. We bought standard sized to pay less, so he had to make the holes in the wall bigger. Unfortunately he got some of the old mortar dust in his eyes almost ten days ago and he's been in pain since, he is convinced it's due to the limestone in the old mortar! From what I gather modern mortar is a mix of cement and thin sand, I don't think it would be of any use

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I still don't understand how our flock can lack calcium since we are on really chalky ground.
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Ok. …