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Helping People. Lasting Results.

A division of JM Inc.

Building Products.


Proven products we use and recommend to make any project better.

Ghostshield – concrete and masonry sealers

Asdco – Local masonry supplier

Brock White – Local masonry supplier

Spec-mix – masonry mortar of choice

Copperfield – fireplace and chimney products 

Total Wall – stucco products

Techo-bloc – landscape products

Quikrete – concrete/stucco products

Mel-rol – waterproofing and drainage products

Lathnet – metal lath with drain plane attached

Our sister chimney sweeping and duct cleaning company.

Check out Midtown Chimney’s website»

Invest in Yourself.

No matter how great the service or the quality of the workmanship, the quality of products used greatly affects the durability and life of your project. Johnston Masonry uses the best products on the market to provide long lasting workmanship. 

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View Our Past Projects.

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Our Clients Say.

“I selected JM Masonry to repair my retaining walls after being severely damaged during the June 20, 2012 storm in Duluth. I received a competitive estimate to do the work. The work was completed in a timely manner and under cost estimates. I was impressed with the efficient and professional manner in which the repairs were planned and implemented. It was obvious that the crew that did the work knew what they were doing. I highly recommend JM Masonry as a company you can trust to do excellent work.”

Tom Tonkin