Colin Smith
Hi Bob. If the building was built using lime then i advise you not to use cement. You need to use lime and there are two types. The use of lime will allow the repair to breath and will also move the same as the lime render around the repair. I have written this responce 3 times in more detail and it does not submit. If you want more info contact me or you can contact The Anglia Lime Company or The Lime Centre. Hope this helps. Good luck. Regards Colin