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Keystone Group

Posted on: 12 April 2017

Category: News

Keystone is the world's largest manufacturer of steel lintels, special arch and corner lintels and their patented Hi-therm lintel is very thermally efficient. The only one piece lintel to conform to Part L with a Psi value of 0.05. Find out how to overcome thermal bridging issues and gain an understanding of common errors.