Replacing a window - argon filled new units?

Hopejack

Help please. We've just bought an old house (30s built) and it has a huge window (3 separate panes with 2 openers at the top) in what will be my little girl's bedroom. The sill is very low - the whole wall is almost all glass with a 570mm sill. I've been told that the glass, although double glazed, is not safety glass and so we've decided to replace with toughened glass, due to 1st floor and low sill.

The question is do I go for argon filled glass bearing in mind the other windows are not, but it is a bedroom (quite large) and the door will be closed at night so insulated that way. We've lived in a 30s house before with old UPVC double glazing and her room was always cold. It was however north facing, whereas now it will be west facing. The difference in the cost is £140 - doesn't sound a lot but we have a huge amount of work to do to the house so every penny matters.

Any advice would be appreciated - I've got to get back to the glazer tomorrow to let him know which I decide on.

julianashcroft

Hopejack wrote: »

The difference in the cost is £140 - doesn't sound a lot

Is that £140.00 for a squirt of gas into the unit? if so that sounds a lot to me.

Hopejack

Yes that's £140 for all three panes (each one is 860mm wide by c 1340mm long) and the three top panes, two of which are openers. If I go for the toughened glass only option I don't need the top three panes replaced as they are at the top of the window if that makes sense. I didn't think £140 extra was that bad - I was quoted that price (£400+) by some glaziers just for the normal, toughened glass. The glazier I've chosen was much cheaper overall - he's offering the argon fill for the price the others were charging for a normal, dg unit.

keith969

I doubt you will notice the difference in heat loss with argon filled vs. normal glass. Is the loft insulation above the room the recommended thickness? If not that will only cost a few quid to add extra.