Help! I don't know mortar from stucco, from cement, from...
I should have paid more attention to "This Old House" when I had the chance...
We had to have the walls of an entire wing of our house redone which meant removing the existing mortar, cement, or stucco... parging. Now we have to put an equivalent sparging back on. We are in a historical zone which means that we have to finish the house with the same material (or its modern equivalent) and in the same colour as what we took off.
Problem is, I don't even know what to call the stuff I took off.
It was some sort of chalky material, probably a lime based stucco that had been applied over a thin coat of mortar or cement, on a metal mesh fastened to the wood planking of the house frame. It had been painted several time, but had cracked, and water had seeped in behind it causing oodles of problems that cost oodles of hard earned to fix.
I don't want to ever have to face the same problems. And I don't want to have to paint the darn thing either.
Acrylic is out of the question - not a "noble" material we are told by the city hall folks. Which leaves me with mortar? cement? and what about the stuff sold as stucco mix?
Also, we must match the former cream yellow colour of the former parging. If we use a cement based product, which is typically grey to begin with, we cannot reproduce the former colour and I'll have to spend time painting rather than sailing. I am told there is such a thing as a white portland based cement which can be tinted to mix just about every colour under the sun, but I can't find any technical data on it.
I should add that this house is over 100 years old and sits near a river where it gets plenty of wind, hot and humid in the Summer, and really, really cold in the Winter. The house is masonry framed except for this particular section which is wood framed and covered (least it was) with some form of cement or mortar or stucco parging.
Also, this won't be a DIY job. Unfortunately, none of the tradesmen we have interviewed has given us a straight or even identical response. The front runner is suggesting some sort of cement which will be shot onto the wall. He suggests to install metal mesh fastened directly onto the wall, with no gap between the wall and the mesh. This raises all kinds of alarms for me. I would think some sort of gap is needed to ensure that the water which will inevitably get in has a way down and out rather than to impregnate the wall and cause mildew or worse.
Right now, there are nailed in 1x 1/2 running vertically every 12" the full length of the walls, over the Typar house wrap. I'd either have to remove them (and cover the nail holes?) or add more to reduce the gap in between so that the mortar won't scallop.
So I am turning to your collective experience and wisdom.
Any thought or suggestions?