Twin cavity sliding doors in walnut, running on a heavy duty track with soft close in both directions.

Units in at frame stage

Both cavity units were set, plumbed and braced before the walls were sheeted, and checked in two directions rather than eyeballed. A slider is only ever as good as the frame buried in the wall behind it.

Ten minutes of care at frame stage is the alternative to opening a finished, painted wall later. Almost every badly running cavity slider is a framing problem, not a hardware problem, and by the time anyone notices, the evidence is inaccessible.

Track sized to the leaf

Solid core leaves at full height need a track rated well above domestic. On a light track the same doors would have felt loose inside a year, and that is not something a client can detect on handover day.

The rating was taken from the actual leaf weight rather than from the door size, because a walnut veneered solid core door weighs considerably more than the hollow core slab the standard hardware assumes.

Soft close both ways

Hardware was specified so neither door can be slammed into the pocket or into the jamb. On a twin set that matters twice, and it is what stops a heavy door from becoming something the family flinches at.

Both leaves were hung, run, adjusted and run again. A slider that is right on the first pass is unusual; the adjustment is the work.

Square set jambs

Jambs and head were finished square set into the wall with no architrave, and the gap around each leaf kept even so the pocket does not read as a slot cut into the plaster.

Services were set out with the electrician and the plumber before the units went in. A power point or a pipe landing in a cavity wall is a problem found late and solved expensively, and it is entirely avoidable with one conversation.

Similar work: single and twin cavity units, heavy duty tracks for full height leaves, and square set or shadowline jamb details.