Help With Brick Restoration On Townhouse Built In 1930 - Masonry - Contractor Talk

Help With Brick Restoration On Townhouse Built In 1930

 
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Old 07-25-2019, 09:41 PM   #1
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Help With Brick Restoration On Townhouse Built In 1930


Hello all, I want to start brick restoration on my townhouse in NYC which was built in 1930. I was hoping to get some advice on the right procedure and which products to use to get the job done right. I have a few of my concerns listed below.

The house was repointed sometime in the 90s. The new pointing looks like a straight Portland/sand mortar mix. There are a few areas where the original mortar is exposed and it looks like a Portland, lime, and sand mix. (I have pictures attached). Can anyone give me an idea of what kind of mortar was originally used by looking at the pictures?

Another concern I have is that there is alot of discoloration on the brick face. It could be because of a acid cleaner or just age. What is the best method/products to clean this type of brick?

And last, I need to complete some spot pointing and I would like to color match the new mortar joints to the old ones. The mortar is much darker and discolored in some areas since its aged for 30 years or so. The mild acid cleaner I tested did not remove this staining. Should I clean the mortar then color match the new mortar or should I just color match to the existing mortar.

Thanks for taking the time to look over my post. Let me know if you have any questions.
Attached Thumbnails
Help with brick restoration on townhouse built in 1930-screenshot_20190725-224216_gallery_1564109045418.jpg   Help with brick restoration on townhouse built in 1930-screenshot_20190725-224225_gallery_1564109060265.jpg   Help with brick restoration on townhouse built in 1930-screenshot_20190725-224235_gallery_1564109073449.jpg   Help with brick restoration on townhouse built in 1930-screenshot_20190725-224247_gallery_1564109089500.jpg   Help with brick restoration on townhouse built in 1930-screenshot_20190725-224257_gallery_1564109102663.jpg  

Help with brick restoration on townhouse built in 1930-screenshot_20190725-224308_gallery_1564109142176.jpg   Help with brick restoration on townhouse built in 1930-screenshot_20190725-224318_gallery_1564109158111.jpg   Help with brick restoration on townhouse built in 1930-screenshot_20190725-224350_gallery_1564109169824.jpg  

Last edited by Melpa214; 07-25-2019 at 09:47 PM. Reason: Add pictures
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Old 07-26-2019, 01:23 AM   #2
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Re: Help With Brick Restoration On Townhouse Built In 1930


The 30's was a time when OPC was being more commonly added to lime mortar before it eventually took over from lime. It's possible the original was something like a 1/2/9 OPC/lime/sand mix.
Put some of the mortar in some acid and this will leave you with a sample of the sand for a colour match.
Your metal lintels look like they are expanding with rust.
The joints don't look like they were raked out properly before the last repoint.

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Old 07-26-2019, 11:13 AM   #3
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Re: Help With Brick Restoration On Townhouse Built In 1930


I highly doubt that it was pointed with straight Portland and sand, that wouldn’t be very nice to work (tuckpoint) with

From the looks of it they used mason cement (premixed portland and lime) and bank sand

If i was trying to match the 90’s pointing in your picture i would use brixment type n and bank sand.....that would match it almost perfect with color and consistency

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Old 07-26-2019, 11:49 AM   #4
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Re: Help With Brick Restoration On Townhouse Built In 1930


You also need someone who has never used a pointing trowel before to match that style.
My 5 year old grandson would have been OK last year, but he's got better at it now.
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Old 07-26-2019, 12:06 PM   #5
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Re: Help With Brick Restoration On Townhouse Built In 1930


Yeah I know, theres alot of rushed work here in NYC. Thanks for the help stuart45!
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Old 07-26-2019, 01:23 PM   #6
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Re: Help With Brick Restoration On Townhouse Built In 1930


Thanks for the reply windycity! I'm trying to get a hold of some bank sand here in the ny/nj area but I cant find anyone that carrys it. Do you know where I can buy some?

Update: I found someone with bank run sand, is that the same?

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Old 07-26-2019, 03:51 PM   #7
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Re: Help With Brick Restoration On Townhouse Built In 1930


I wouldnt worry too much about the term but bank sand is real fine with hardly any aggregate in it....almost like sugar with no granulars

Sand is sand, but you need to try to match the texture and from the looks of the previous tuck pointing it looks like the sand is real smooth


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Old 07-26-2019, 08:43 PM   #8
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Re: Help With Brick Restoration On Townhouse Built In 1930


What were the years asbestos was used in mortar?
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Old 07-27-2019, 12:58 AM   #9
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Re: Help With Brick Restoration On Townhouse Built In 1930


Not much asbestos used in straight mortars.

More in caulks, plasters and stucco finishes, water proofing tars.....

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