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In areas prone to high winds and hurricanes, double vertical “jack trim” and horizontal “header” and “sill” studs are recommended on all sides of window and door openings.
Instead of solid timber headers over windows, insulated headers can be used consisting of prefabricated structural insulated panels or site-fabricated with two sheets of plywood sandwiching a layer of rigid foam.
Insulated header made of one piece of plywood aligned with exterior wall, with room for insulation to inside
Insulated header made of two pieces of plywood that sandwich a layer of rigid foam insulation
Insulated headers can be hung with metal hangers instead of jack studs to reduce lumber usage
Right – Appropriate use of framing members to support double windows and additional cripples for drywall purposes
This hot climate zone home uses high quality batt insulation to insulate truss-joist headers.