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Architectural Resource Center

Welcome to the Architectural Resource Center, which contains information that is designed to make it easier for you to specify a job and to use our materials and services.

If you need additional information, please contact Bruce Petersen, Director of Sales & Construction Support, at 773-414 -5486 or petersen@usheritage.com

Why Specify Preblended Products?
Achieve a Precise Match
U.S. Heritage Group is the only mortar manufacturer in the United States that offers a quality mortar matching and custom blending service utilizing a national sand library.  Our commitment to quality starts with identifying the raw materials used in the original mortar through laboratory procedures that correspond to the U.S. Department of the Interior, National Park Service guidelines for historic masonry.  All mortar formulations are designed specifically for each application condition to maximize life cycle performance. All mortar products comply with appropriate ASTM or ACI compliance when applicable.

Mortar products are weigh batched, in contrast to volume batched at the jobsite, which eliminates the chance of any inconsistencies. The use of "wet" lime putty is new to the modern jobsite, and a lack of familiarity with the material accounts for many contractor mixing mistakes. By contrast, our production process accounts for each mix component, wet or dry, to ensure that the finished mortar complies to design and specification requirements.

Consistency
Consistency is maintained in each production run by using dried sand from our national sand library, which eliminates the bulking effect associated with varying moisture within the aggregate. (The size of the sand and its moisture content at the time of mixing can change in volume by as much as 30 percent at a jobsite.) Additionally, it is well documented that hydrated lime has a volumetric loss of 25 percent when converted to putty with the addition of water.  To protect against problems associated with improper proportioning, all sand, cement, hydrated lime, lime putty, hydraulic lime and pigments are preblended together at our factory in controlled conditions.  

Efficiency
U.S. Heritage Group custom preblended mortars significantly reduce the labor required to formulate and install mock ups for architect approval. Most projects require a contractor to install mortar mock up samples for comparison against the original material, and while this requirement seems straightforward it is often complicated by vague testing report results and the difficulty of obtaining satisfactory raw materials to make the mortar.

U.S. Heritage Group's preblended materials allow the masonry crew instead to concentrate on wall preparation, mortar installation and finishing. Consistent mortar is guaranteed, with the result being higher quality, consistent materials. We also archive our material formulas and testing results, so we can replicate the mortar upon request at any time.

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Selected Preservation Briefs
Download and print the preservation briefs to supplement your specifications.

 

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