Outdoor lagging for 20mm piping.

[seadogg]

Can anyone recommend a good lagging for the exhaust water pipe from a condensing boiler where it runs outside the house?

[The Builder]

Any plumbers merchants or DIY store would have regular polyethylene pipe lagging. I'm sure you've seen it......... cylindrical, with a slit all the way along its length to enable fitting.
It's usually about 25mm thick, but see if you can find the thicker one.

[seadogg]

The stuff we have is the kind of expanded foam found in lofts and it isn't up to the weather we get by the sea. Will have a look for the better type with a larger I.D. Thanks builder.

[buildersmate]

Last time I did this job I chose to use ThermoWrap. This is it.
http://www.tesco.com/...%26+Cleaning_202-0824
(you can get it from many sources).
It is a spiral version of the common multifoil insulation but I picked it because I didn't have good access to be able to fit the slit version of foam. Also I find those slit foams won't fit around 90 degree bands and fall off. You can stick this product down by winding Duck tape around in a spiral - it doesn't compress it.

[bookbinder]

I've used the lagging that The Builder recommends. It's coloured dark grey, if that helps, and, yes, you can run it around 90 degree bends if you cut it to fit. I covered mine with plastic that I cut from a lawn feed bag, just to make it a bit weatherproof, and wrapped it round with plenty of outdoor grade adhesive tape. Don't use clear plastic to weatherproof it, because the birds can see the lagging, and they love to peck at it to line their nests!

[seadogg]

Thanks Bookbinder and Builders Mate definitely worth a look. Should be proof against the winds we get.