I found the following infor online and would like to double check it with the experts here at Breaktime.
“When repointing the exterior face of an old-house foundation, mortar needs to be softer than the surrounding stones or bricks. For this reason, you should usually avoid pre-packaged mortar mixes — which contain a heavy dose of “hard” Portland cement — for exterior old-house work.
Inside, it’s a different story: Pre-packaged mortar mix can be used for the repointing and also the recoating. Simply follow the mixing instructions on the bag of mortar, troweling the mix between the stones and finishing with a complete coating.”
My situation is repointing the interior basement walls but this is the first time I heard you could use the pre-packaged mortar mixes rather than approximating the the sand and lime mixure of the original mortar followed by a fresh sparge coat on top. Is this adive correct? Thanks for any help you can offer.