Trimming Plenums

[worldwidewebs]

When is the best time to trim the plenums to length - before skimming or after? We have the plasterboard fitted and skimming is starting this week so should I trim now or wait until after skimming?

[Jeremy Harris]

I trimmed all the terminal connections before skimming, so they didn't get in the way.  Having them sat back a few mm didn't matter, as the push fit terminal stubs were plenty long enough to engage in the connections.

[worldwidewebs]

Thanks