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Thanks - that's reassuring, but what's a "hen-walk" ? Frazz

Looks like the building developer has done the decent thing and contacted the original roofing contractor to sort out this problem and should be in contact when they have finished their current contract. Since at the very least the ridges will need raking out and repointing, should I expect them...

Noseall - Judging from the bits I've collected in the garden, it looks like it's probably secondary pointing rather than bedding mortar. Do you suggest that I get this looked at or just leave it and keep an eye on things i.e. evidence that the ridge is actually lifting. Thanks - Frazz.

We live in a 'new build' which is about four years old. Have noticed that a lot of the mortar along the bottom of the ridge tiles is starting to fall out. The bits that I pick up in the garden are pretty solid, but along the west facing ridge there are gaps nearly all the way along where it has...

"Put it anywhere near the plants and they're DEAD. salt is the best plant killer on the market, and that includes the lawn " What a load of crap. Just goes to show what you know about softened water. Check your facts first. If it's going to kill the grass just think what it's going to do to...

Thanks for the info. Might have to call Halstead again as installation manual gives no indication of what pressure should be in the tank. Any ideas whether this does sound like a vessel problem though as it definitely is pressurized, but still venting through the PRV at less than its rating...

Any suggestions? Any would do - am reluctant to go down the route of changing the pressure vessel unless I'm sure that it's faulty as this looks like a BIG job, but no-one I've talked to can suggest a way of diagnosing what exactly the problem is. Cheers - Frazz

I've had problems with the pressure dropping in my system when the CH is running. Pressure remains constant with no heating on. Set it to about 1.5. After heating has been on, and cooled down again pressure has often dropped below one. Halstead suggested either that the pressure vessel may need...