On a winter shift, press a fingertip against the jamb of a closed roll up door and hold it there for ten seconds. A steady draft, a dust line on the first rack row, and pest complaints that keep returning all point the same way. The door itself is probably fine. The sealing is not.
That is a structures problem, not an accessories problem. RAX Door Technology has built high speed doors in Hebei since 1999, with 21 models running at 0.8–2.5 m/s across our high speed roll up door line. On our own insulated model, the seal package is specified as perimeter weatherstripping on all four sides plus inter-panel EPDM seals. This guide takes high speed roll up door sealing apart position by position, so you can read your own doorframe the way our engineers do.
Where a High Speed Roll Up Door Seals
A high speed roll up door closes four separate lines at once, and each line needs its own seal type. The curtain edge travels down the guides twice per cycle. The bottom edge meets a slab that is never as flat as the drawings claim. Th