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Hi Tony The system is not pressurised as far as I know and there is no pressure meter on the boiler so I have no way of knowing what the pressure may be. Incidentally, the problem with the boiler turned out to be a faulty boiler thermostat (this must have been one of the extra bits that...

A further thought, If there is not an airlock in the pump then it may be that the pump is starting to fail. With the c/htg off and the pump cool, unscrew the large central silver screw (there will probably be a bit of water weep out). Can you turn the pump by hand? It may be stuck. If...

Hi again, Just had this boiler repaired after a week of no c/htg or hot water! Heat exchanger replaced for 2nd time in 3yrs on an 11 year-old boiler along with a few other "bits & bobs". Since completion of the repair at around 2-2:30pm this afternoon, the boiler has repeatedly...

Hi, Whilst all of the above is true, you probably want heat rather than wait in the freezing cold for the plumber to return. Cold rads are a symptom of air in the pipes. Try turning the system on for half a min, then off, then back on, then off etc. Do this several times & then check...

Hi Most likely drop out over time. Best suggestion was the netting from noseall as you don't have to be a contortionist to secure battens from beneath the joist. Picture shows you exactly what to do. You can secure the netting simply by using staples from a stapler (or a staple gun)! Wear...

Not an expert but is it salt beeing leeched out of the sand in the mortar mix as moisture rises up through the brickwork? Should you have used washed sand? Dave

Doh! So it does. Dave

[/url] That's a very useful link many thanks once again PrenticeBoyofDerry. Bay was added (I suspect) to the house around 25 years ago by previous owner. The tiles are probably nailed on? Not be attempting this for a while just sitting here with a broken boiler made me think "I really...

That's quite a scary thought - that boilers only last 10 years or so. The Ideal Minimiser - although being a pain for most of its life due to Aluminium Oxide build-up which prevents firing :roll: - has done OK then to last 11 years?? Although I do watch tradesmen whilst they work (and...

Thank you PrenticeBoyofDerry. So I need to lift the lead flashing at the top of the roof pitch first? This would have been the last row of tiles to have been fixed - so the fixings holding them in place would be readliy accessible? Just checking that I've got this straight. Dave

Merci mointainwalker You have been following the discussion I take it? Dave

Ok Tony, You've convinced me. Thanks for all of your time & trouble. I am now much wiser. An 18kW boiler should do the trick. Dave BTW, the window area works out to be 13% not the 17% that sedbuk & EST assume, so this helps to convince me also :) D

Such a helpful post! Thank you :) Having spent a lot of money only 10 years ago on a new boiler, I find myself in the same position of having to replace it. Now possibly you can afford to throw money away, but I want to make sure that this time the money gets spent wisely. The only...

Just looking at the EST and sedbuk calculations again. EST Calculator reckons 15kW boiler is required, sedbuk says 18kW Sedbuk calculation makes a 2kW allowance for hot water whereas the EST calculation does not? These both assume a window area of 17% of wall area? EDIT: Actual...

Sorry Tony if it appears that I'm going against advice, just don't want to screw up by finding that the boiler can't cope with extremes of temperature. Made a BIG mistake last time getting the Ideal Minimiser - what a DOG that turned out to be! Trouble was, 11 years ago, there didn't seem to...

Hi, Quite a competent DIY'er, but have never tackled roofs before. Problem is that there is little or no insulation below the pitched roof of my wooden bay window. I'd like to put some Rockwool up there as the bay is quite cold with a noticeable draught coming through the down-lighters...

Hi, I have a 2-storey wooden bay window with exterior overlapped cedar cladding. I suspect that there is little (or no) insulation between the exterior cladding and the internal plasterboard although there is a waterproof membrane. Any idea where I can get dark "wood effect" uPVC...

That's OK DH, 'twas easily overlooked. We have had several occasions over the past few years where the temp has been down to -5 to -8˚C, so I think that I'd prefer to go with a 24kW boiler then for "insurance" because my elderly mother lives with us and she feels the cold terribly...

So if the outside tempetaure is lower than -1˚C, the boiler will not be able to maintain the internal temperature? Errr.... Not at the moment. The boiler is broken and we have been without heating & hot water since 9pm last Wednesday evening (30th Dec). 3x 2kW electric convector...

Thank you both. You seem to be agreed that an 18kW boiler should suffice - we'll see if British Gas agree! So, I'm looking at 1) Worcester Bosch Greenstar 18i (or 30 CDi System Boiler) 2) Vaillant ecoTech plus 618 System boiler or the 3) Borag Remeha Avanta Plus 18s System...