Window Sills (Cills), external. DIY.

[ToughButterCup]

Along with @HerbJ here , I messed up on external window sill widths. So I need some. And since financial pips are squeaking, I thought I'd make some.

 

How far either side of the window's structural opening should the sill extend?

[Carrerahill]

Is this the external concrete/stone/metal ones or internal timber?

Edited November 6, 2019 by Carrerahill

[ToughButterCup]

Externals ...

[Triassic]

Ali, stone or timber?

[Triassic]

In the cabin I used up offcuts 10mm thick slate floor tiles as cills.

 

 

 

Edited November 6, 2019 by Triassic

[ToughButterCup]

11 minutes ago, Triassic said:

Ali, stone or timber?

 

Timber.

Interesting thought to use stone : how wide should the cill be - better put, how much wider than the structural opening should the cill be?

[Construction Channel]

Whatever look right. 

Whats going on the reveals? (cladding/render) 

Don't forget whatever you put on the reveals will make the "horns" look longer. 

[ToughButterCup]

10 minutes ago, Construction Channel said:

[...]

Whats going on the reveals? (cladding/render) 

Don't forget whatever you put on the reveals will make the "horns" look longer. 

 

Cheers Ed.

Reveals?

Some really nice  bits of timber boarding  - saved  from the wooden packing which came with the windows: knot free, dead straight, stickered outside since delivery. Just needs a run through the thicknesser.  And a good few coats of sealer. 

Really looking forward to it.

 

Kiss the cat for me eh?

[ToughButterCup]

Bloody Hell Ed, just remembered your video .... Theres no reason why I shouldn't make a window sill like this is there?

[scottishjohn]

1 hour ago, AnonymousBosch said:

run through the thicknesser.  And a good few coats of sealer.

or  maybe line them with bits of plastic soffit material --that will be smooth and pretty non stick , 

 AND PLENTY OF VIBRATING TO GET AIR BUBBLES OUT 

  i used an orbital block  sander on outside of one i made  to vibrate the air out

Edited November 6, 2019 by scottishjohn

[Construction Channel]

2 hours ago, AnonymousBosch said:

Bloody Hell Ed, just remembered your video .... Theres no reason why I shouldn't make a window sill like this is there?

 

Not really. Assuming that is the look you are going for. 

[dpmiller]

Dunno just how tight funds are, but what's wrong with precast?

[epsilonGreedy]

7 hours ago, AnonymousBosch said:

How far either side of the window's structural opening should the sill extend?

 

 

About half the length of a facing brick.

 

Edit: I can take a measurement off my neighbour's build tomorrow if you like?

Edited November 6, 2019 by epsilonGreedy

[ToughButterCup]

1 hour ago, dpmiller said:

[...] but what's wrong with precast?

 

Not cool maaaan, not cooool. ?

[Visti]

I've got about 35 alu cills going spare, 180mm deep... free to those in various lengths if desired.

 

Didn't realize they had to extend past the external face by 25mm ?

[Construction Channel]

43 minutes ago, Visti said:

Didn't realize they had to extend past the external face by 25mm 

 

And on the 36th the penny dropped? 

?

[Visti]

Truth be told, half the first batch of 21 were the wrong colour. Suppliers fault.

 

Only after that did building control actually inspect and find them 10mm short... ?

[Roundtuit]

10 hours ago, AnonymousBosch said:

 how much wider than the structural opening should the cill be?

 

Not sure that there is any reason for the cill to be any wider than the structural opening, other than aesthetic preference? I'll shortly be fitting aluminium pressings, and they'll be the width of the opening (minus a few mill for fitting and a bead of silicon)

[epsilonGreedy]

2 minutes ago, Roundtuit said:

Not sure that there is any reason for the cill to be any wider than the structural opening, other than aesthetic preference?

 

 

My guess.

 

During heavy wind driven rain, water flows off glazing, over cill and then drips clear of wall. Without a 100mm extra each end some of the water flow will escape over the cill ends and run down the wall.

[Roundtuit]

1 hour ago, Visti said:

I've got about 35 alu cills going spare, 180mm deep... free to those in various lengths if desired.

 

 

RAL 7015 by any chance? ?

[Visti]

 

3 minutes ago, Roundtuit said:

 

RAL 7015 by any chance? ?

 

21 in fact. Rest are RAL 9004

[Roundtuit]

23 hours ago, Visti said:

 

21 in fact. Rest are RAL 9004

Might be able to find a home for some of those!  Pm incoming!