The Exterior Bifold Door Buying Guide

Begin with the complete opening

Record a unique opening ID, measurement type, width, height, header, jambs, sill, interior and exterior floor levels, exposure and clear photographs. The panel layout is only reliable when it maps back to those conditions.

Plan daily use before panel count

Decide where people normally enter, whether a traffic panel is needed, which direction panels fold and where the stack can sit without blocking furniture, railings, counters or circulation.

Choose the threshold from the exposure

A lower transition may look cleaner, while a more weathered sill may manage exposed conditions better. Drainage, recess depth, waterproofing and adjacent floor finishes should be detailed together.

Keep the complete cost visible

Compare the door, glass, finish, screens, hardware, engineering, freight, unloading, demolition, structure, waterproofing, installation, finishes, permits and disposal as separate scopes.

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