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The Use of Polymer Modified Mortar for Tight-fit/Dry Stacked Stone Veneer Installation

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REGARDING: The use of Polymner Modified Mortar for tight-fit/dry stacked veneer installation

 

TO: All Kodiak Mountain Stone Dealers, Installers, and Users:

 

We believe quality stone demands quality installation. Mortar has changed. We ask that you all stress the importance of using Polymer Modified Mortar for tight-figt/dry stacked stone veneer installation. These new Polymer Modified Mortars are more workable, and they bond better.

 

Type N or Type S mortar should not be used for installing tight-fit/drystacked installations. Polymer Modified Mortar should be used for these tight-fit/drystacked installations. Conventional Type N and Type S mortars are designed for laying up block and brick, and are not required to have high bond strength. Polymer Modified Mortars on the other hand are made specifically for bonding and provide very high bond strength. Type N and Type S mortar are adequate for installing stone applications having grouted joints because the grouted joints provide additional bond to the sides of the stones; and also because the grouted joints act as a secondary attachment. In addition, the grouted joints also seal the stone walls from water accumulation behind the stones which can cause debonding when frozen. But tight-fit/drystacked stone installations don’t have these grout joint “safety valves”.

 

Thanks for your continued business.

 
 


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