On 10/05/2015 11:52, firstname.lastname@example.org wrote:
Do they?! How does that help fire safety?
My house was built in the 1960's with cavity walls and wooden window
frames in the outer leaf. All the original (single glazed) windows have
been replaced with double glazed units in thermal break aluminium frames
- again fitted in the outer leaf, set back about 40mm from the face of
the brickwork. This then only requires a fairly narrow cill on the
outside but provides a decent cill on the inside which is wide enough to
accommodate flower pots, etc. (or other miscellaneous junk!)
On Sunday, 10 May 2015 14:37:09 UTC+1, Roger Mills wrote:
Flames licking up the outside take longer to ignite the frame, retarding fire spread. Inner leaf windows have been standard for this reason for a very long time. Outer leaf windows tend to be found on very old houses that predate this.
He's talking drivel.
Windows are to keep the weather out, as is the outer leaf.
Hence the window has to be linked/continuous with to the outer leaf.
Plastic windows are a fire hazard.
The plastic gives off highly toxic fumes in a fire.
Just looking at the uPVC windows fitted 5 years ago to this 1930s
house, to replace all the preexisting. It seems to vary. The window of
this room is on the inner leaf, with vertical closure strips to cover
the cavity gap. That's a brick wall. Some windows around the kitchen
area are on what must be the outer leaf; these are rendered walls (I
was going to say pebble dash but I'm not sure what that is.)
Then we have a new porch on the side of the house, built a couple of
years ago. There, definitely on the outer leaf.
HAL 9000: Dave. Put down those Windows disks. Dave. DAVE!
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