Krieger Specialty Products
Krieger’s acoustical doors with high STC sound control ratings, come with Krieger manufactured aluminum thresholds.

Krieger thresholds are manufactured as solid units to increase sound control and eliminate noise pathways of conventional saddles. This feature is just one more way Krieger ensures the acoustical properties and guaranteed ratings you require.
Krieger Aluminum
Threshold – 1A Cut Sheet
Krieger Aluminum
Threshold – 2A Cut Sheet

Understanding Acoustical Door Thresholds
Acoustical door thresholds must have a smooth surface for the door bottom seal to land on, slide across, and seal against. This applies equally to a level swing door with automatic bottom, or a cam lift door with a fixed (adjustable) seal.

When sound control doors swing open over carpet, a smooth surface saddle threshold of at least the same height and preferably higher than the carpet, must be used. This positioning is essential to prevent sound leaks from under the door and/or through the carpet. Thresholds must be set in a good grade of acoustical sealant.

The use of fluted or otherwise abrasive coated thresholds will cause premature wearing down of the neoprene on the door bottom and could cause the seal to pull out of its retainer and jam up under the door. All thresholds must be set so they extend a minimum of 1½" beyond the pull side of the door to provide a “landing” area for the door bottom as it starts to descend.