Dave wrote:
I've finally finished installing the new heating and DHW system (with
some help) but now I need to insulate all the pipework. Most of the
downstairs ceilings are down so I can get to the pipes easily; the
boiler, cylinder, zone valves and DHW circulation pump are all in the
back of the garage.
What's the best and most economical way to insulate the pipes?

foam pipe lagging. I only did mine in areas which may have been
vulnerable to frost, against an external wall, for example.

I've seen the lengths of semi-rigid foam sleeve in the sheds but these
ar not going to be any good on the bends

cable tie them on.

(and are not cheap).

cost/benefit analysis, work out the cost and payback time. your call



RT