Anthracite aluminium bifold doors opening onto a garden deck, showing the bifold door threshold detail.

Bifold Door Thresholds Explained: Threshold Types, Safety & Weatherproofing

If you’re choosing a new set of bifold doors options, you’ll quickly notice two competing goals: a clean step-free look, and a properly sealed, long-lasting door that doesn’t let wind-driven rain (or drafts) creep in. This guide breaks down low threshold vs standard threshold—what changes in real life (access, warmth, puddles, security), what installers need to

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