New Window

[AdamCH]

I have to fit a regs compliant window in an extension I'm having built. I've been looking at the Part L regs and scratching my head so I thought I'd ask.

Window will be hardwood (Meranti) to match an existing window size is 910 x 1050 (cill is 900 mm off the floor so non toughened is okay?). I'm assuming this will be okay as long as I fit the right glazing.

Can someone advise what glazing needs to be fitted?

 

[^woody^]

Double glazing

 

[AdamCH]

Yes but what specification?

 

[tony1851]

Will it also have to comply with Part B (means of escape)?

 

[AdamCH]

No, I don't think so. There is already a window in the room with two side opening lights - each >450mm wide. The new window will also have a side opening light.

I think it's just ventilation & energy efficiency that I need to worry about.

Wondering how thick & what U values for the DG units (ones in the other window in the room are 20mm DG but aren't particularly energy efficient). Being timber windows it's useful to keep them reasonably slim but suspect I'll need better units than I have in the current windows.

 

[freddiemercurystwin]

The U Value it needs to meet is 1.6W/m²K.

 

[^woody^]

If the window section takes a 24 or 28mm unit, put one of those in. If it only takes 16mm, then the unit will need to be filled with an inert gas

Low-E should come as standard