FAQ Knowledge Articles

In general, header deflection should not be any more than 1/16" unless otherwise specified in the specific product's Site Preparation Guide. This general dimension comes from the standard 1/8" panel-to-frame gap allowed for Marvin products.  No more than half of that space should have deflection in order to ensure proper operation.

Below are the links to the specified door Site Preparation Guide:
Multi-Slide Door
Lift and Slide Door; with Performance Sill