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Sorry, I still do not fully understand the point about counterbalancing. Surely if I replace the glass for both upper and lower window (and they are roughly the same size) then they will still be balanced?

Thanks everyone, I will look into sealing/draught proofing properly first. I know I can get retrofit at a window joinery, however looking for some DIY advice. Is it possible to just order the double glazing ourselves and do it?

All pipes are in the loft. There is no pipe under the floor, except for main that also goes up to loft before going down to kitchen. Boiler is in the kitchen, HW cylinder is in a hallway cupboard.

@Mr Chibs The upper sash is sealed shut, the lower can open. So you reckon draught-proofing the windows is more effective than double glazing them?

@ianmcd @FiremanT Sorry for my somewhat ambiguous question, too much thinking out loud there. My question is not about the boiler systems. In short, I'm asking whether I should re-run pipes under floor, or leave pipes where they are in the loft and just re-route a few. Obviously it's tempting...

Hello everyone, Has anyone tried to retrofit double glazing onto old single glazed sash? The previous owners of my house has fitted a second layer of glass onto the windows (see photo). It looks pretty good however it is obviously not 100% air tight, so I wonder how effective that is. I'm...

Thank you @Mottie and @oldbutnotdead . So I guess my remaining question is how to drain a conventional system down properly, step by step if you can. Any pitfalls I should be aware of? Why this is not usually recommended for average DIYer?

Hello everyone, I have a conventional boiler with quite old 1970/1980 radiators (see photo). Just a few beginner questions, hope you can help with. 1. The previous owners have somehow managed to lose all the valve cap. How do I figure out which one is the lockshield valve, which one is the...

@JohnD Hi John, I'm looking to top up a layer of insulation and trying to find the Ecose type you mentioned but couldnt find any (I can see the it's mentioned on the Knauf website). Which store sells them or if you have an online link please let me know. Much appreciated.

Guys, sorry I don't want this to be the discussion about combi vs traditional. Could we please return to the original question? Thanks

Hi @ianmcd . Yes I understand. However that's not the question I'm trying to ask. Please see my post below:

@ianmcd Hi Ian, I have not decided where the new combi should be yet, but I think it should be in the kitchen to minimise the distance to the taps (the bathroom is next to the kitchen). At the moment the old boiler is in the kitchen. The HW cylinder is in a hallway closet. So flow from the...

Thank you @oldbuffer for your thoughtful reply. Yes I have checked the mains pressure, it is adequate for a combi. My main consideration is whether to leave the pipes on the loft or re-run under floors. I know it is possible to leave them on the loft, however re-running them under floors with...

@Hugh Jaleak Apart from combi being able to only feed one hot tap at a time (not a problem for us really, we are only a couple), I don't see any major other disadvantage, while there is so many things that need maintaining and can go wrong with traditional system: pump, water tank, hot water...

@CBW I'm moving to combi so the issue was not about main fed cold/gravity fed hot. I'm asking normally when converting from traditional boiler to combi, do people move their pipeworks from the loft to under the floor? This has big implication for my renovation plan.

Hi @blup , yes currently the bathroom cold water is supplied by the water tank. However I imagine it is not difficult to reroute to main, as we have a main pipe going to the water tank nearby. However my main question is should I leave all the pipes up in the loft, or redo them under the floor.

Hi everyone, We are considering of changing our traditional boiler (hot water cylinder/water tank) to combi boiler to save up some space. At the moment, the water storage tank, heating system tank and all the pipeworks are in the loft, even the main cold water goes up to the loft before going...

Very helpful advice lads.

@JohnD Thank you, that's really good news. Is there any risk around the junction box at all? I was thinking getting a plastic box to cover the junction boxes in case there might be spark. And you are absolutely right about irritant, I spent some time moving the wool around to locate the...

@JohnD Great question. Here is a photo. Could you tell what type of insulation it is? I guess it is mineral wool but not 100% sure. I remember there was a piece of plastic bag that said "Wickes Loose Lay Insulation", however I threw it away :( .