[matt]

some of the self build campervan types, drill holes every so often though the ply lining and squirt expanding foam in, this is s.posed to make the van ALOT warmer, you will then only need a small heat source in the van

In America when they build a new house (they are all timber frame) they fill the space in the walls up with that foam and it insulates the houses beautifully. Mind you its about 8" thick all round the house so it should do.

indeed, its sprayed on the inside of the framework, its also a VERY good fire retardent aswell

[Dean Taberner]

Whenever possible have the hoses running off the ground, and I don't mean just 2 inches so it's creates a massive trip hazzard, I mean 7 feet off the ground over the top of vehicle/walls etc.
Cold water going through rubber hose on the ground where the ground is freezing means that hose and water will freeze up.
www.safetyawarecontractor.co.uk

How is this possible without erecting about 12 scaffolding towers?

Dean

[RSWindows]

If its that cold then stay at home

If only it was as easy as that 

[neil100]

At night when its going to very cold,I bring the batteries into the house to recharge. I throw a thick duvet over the hose reels and pumps.

The van is parked on the drive next to the houseat night,the van is plylined with loft insulation behind the plylineing.

I have a thermometer in the van,40 minutes before I go to work if its freezing outside I check the temp in the van,if its freezing or just below say -2, I put a van heater on for 30 mins on the hottest setting,When I go to work its plus 15 degrees C in the back of the van. I direct the van heater at the pumps to make sure theirs no ice in them.

Then its off to work to earn some lol.

Neil