Parting Bead Widths - Casement 'slot' widths

[AnalogKid]

If I can add, Thank you to @Feltwell, @Cubist, @CliffordPope, @a twig

So far one window out 4 is completed -
(almost - I'll swing the sashes out again , so I can re-point/re-seal the vertical interface between the outside brick wall and the outer sash case, and then apply bronze cupped screws to the staff beads)

But here's the moment the penny dropped.

The moment I pushed the staff beads in and created a 'seal' for the sashes against the brushes on the parting beads, staff beads, and meeting rail , all sound from the outside world was 'eliminated' immediately.

Allow the staff beads pop out (loosen) a few millimetres (allowing the sashes to 'unseal' from the brushes) , and the outside world noise rushed back in

The effect was like a switch turning the external worlds noise 'ON/OFF'

If some one had of told me this, I would not have believed them.

It's made the effort, so far worth it and more.


PS: @Feltwell . The black Mighton Grabbas made for a very simple fit and fix

PPS: Theres also a 5 mm 'bubble' of Aquaseal weather strip , that neatly slides into a grooved plastic carrier, that's routed into the top of the top sash to seal against the top of the box

 

[Feltwell]

Glad you're pleased! It is amazing the improvement it makes. I bet they're much easier and smoother to slide open & closed as well.

 

[AnalogKid]

They never slide - it was always a two handed struggle to jiggle the window upwards.

Now - a single finger lifts the sash!!

 

[Toby Newell]

Bodging for the win! Was going to say didn't fancy the tablesaw option much!

 

[AnalogKid]

With the good weather here - I've been able to partially complete another Two Sash Windows.
Still the same issue - that the parting bead gap in 5mm

I havent been inclined to widen the gap using a grinding burr to (Say) 7mm
Or even to 10mm and use the Mighton/Reddiseals U channel holders for parting beads

Here's the new 'rig' for saving 2mm off of a 7mm parting bead
Using the method @Feltwell recommended last year

The router bit is 2mm up from the level of the router base - It works OK good enough for the job at hand

Much easier than 'sandwiching' the bead as seen in other photos

Here the parting bead is simply run across the top of the router - and some 'push sticks' used for safety


I will - though - for the remaining Windows go down the '10mm plastic' U-Channel path into which the parting bead is pushed - using the Reddiseal/Mighton systems

 

[mardinor]

Those palm routers are brilliant bits of kit, aren't they?

 

[Stevers]

Old houses in the UK (right through to the 1960s) would have been built in feet and inches, the 6 to 7mm groove could be 1/4" or 6.4mm, and the 5mm groove 3/16" or 4.8mm.