Running in the cabling for new mains-powered interlinked smoke, heat, and CO alarms.
To comply with the new retrospective building regs, this is going to require a total of seven devices due to the layout of this place.
Two are direct replacements for existing ones which are over 10 years old, and I didn't want to mix-and-match manufacturers over the installation.
In an older property which has been extended several times, this is a total PITA.
All the void spaces are inaccessible, or filled with rubble or old insulation, or blocked by dwangs.
Struggling to get the fish tape more than a couple of metres at a time.
The necessitates cutting small access hatches in the ceiling plasterboard, which is simple enough, but my arms are now pumped from working above head-height all afternoon.
Mostly done now.