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Posted by National Lock Supply on Dec 16th 2025
Commercial door thresholds create the critical weather seal, accessibility transition, and structural support at the base of exterior openings-yet they are frequently misspecified, incorrectly measured, or installed with fastener patterns that void weatherproofing warranties.Pemko commercial threshold line dominates institutional and commercial specifications due to proven weatherproofing performance exceeding ASTM E283 air infiltration standards… Read more