Another deeply dull window question, Do replacements HAVE to be double-glazed now?

[Tinker]

Original is single-glazed but one joiner has told us don't have to replace with dble glazing. I think he's wrong. Not bothered myself but this would be picked up when sell house no?

Don't think you have to have double but all lower floor windows have to be K glass IIRC.

no, there is no reason why you have to have double glazing. it makes sense of course in terms of insulation and noise reduction, unless you have an old period house and want to replace with original windows.
In terms of selling I think people like to see double glazing and it could affect the value of the house

Want to replace sash with wooden sash lookalike even at myslef for even thinking it but more at price of sash replacement for which we'll get no benefit. Live in an area of rip 'em out and shove plastic horrors in. I'd be thought namby-pamby for getting attached to my sashes.

you can get double glazed sash windows can't you? but very expensive I think

We just replaced our 3 horrible windows with proper sashes and it's really been worth the horrendous expense. They look fantastic and the insulation is far better. There's just no comparison.

Forgot to say, that yes, ours did have to be double-glazed although am not sure why.

Think it is just new windows that need to be doubleglazed - ie not just replacig exisitng wndows.

We had a new window put into our kitchen and that needed to be double glazed (and K glass) - even though the other (exisitng) window is stll single glazed.

It's a double glazed sah window, and yes, it was expensive, bu can't say exactly how much, as the cost was bundled in to the cost of creating the window (not a small job in a Vicotorian house with 3 foot thick stone walls! )

I think if you just have a broken pane you can replace that like for like but new windows have to be double glazed for energy reasons

You can get double glazes sashes but they cost a fortune!Really warm though and look so much better than plastic imo.If you are not bothered in the short term and most of the houses are double glazed where you live that might help with selling but if you get snooty 'period'house types (like me!)then stick with wood

i got a double glazed sash, standard kind of size and was £800. I love wooden windows and would always replace with them. UPVC is an environmental nightmare and looks crap. I think you need to check part L of building regs afaik replacement but not refurbished windows replaced after 2002 need to conform to part L. So you just say you haven't replaced any windows after 2002 - only refurbished. Frankly I understand the need to keep houses warm but once you get fully double glazed then the house has to have bits sorted out so that air can get through in other ways - so why not keep the drafts that naturally air an old house? Seems a bit bizarre to me.

I'd do what your joiner says, who's going to know? depends how long you'll stay there of course, in 20 years no one can challenge you but if you sell next year, its more of an issue.

Look for pilkington LOW E glass. This is single pane glass that has been specially treated to provide the same kind of thermal performance as traditional double glazed windows. In terms of selling, the more energy efficiency measures you put in place the better. The new Home Information Packs that sellers have to provide to buyers will detail the energy efficiency performance of your house. THe more insulation etc you have in the more appealing it will be to a buyer particularly in view of rising energy prices, gas and leccy are NOT going to get cheaper even if we do get a new generation of nuclear power stations.

Thanks for all the answers folks. Think I'm even more confused now

Definitely NO plastic ones for me. Agree about environmental disaster and hope they'll be banned.

Can't afford wooden sash = £1000.

So, think might compromise with wooden sash lookalike and get dble glazed = £400 ish.

Think might just ask estate agent though. Am worried some joker will try to reduce price by quoting price for replacement sash ie like for like when I know they'd most probably shove a plastic one in asap.