Do I need a cavity tray?

[MonkeyHunter]

Hi,

I am going to install a flush electric meter box under my front window soon. Will I need to install a cavity tray, or will the one above the window, and the windowsill effectively do the same job?

If I do have to install a cavity tray, then what is the best way of fitting it into the inner leaf?

Cheers!

 

[masona]

How far is it from the top of the meter box to the window cill?

 

[MonkeyHunter]

Thanks for the Reply masona, I haven't installed it yet, so yet to cut the hole. I just want to make sure I have covered all my bases, and have everything ready.

I was thinking of putting it 1 or 2 courses of brick below the window cill, and it has a lip so there would be less brick than that exposed above it.

 

[masona]

Okay, it's not difficult to do, put a sheet polythene dpm behind the box on the inner wall then a dpc under the window cill to the front of the box, when you buy the box, there's instruction explaining this.

 

[MonkeyHunter]

Thanks for the help masona. No instructions with my box unfortunately

 

[freddiemercurystwin]

http://www.meterboxes.co.uk/content/PDF Files/6.jpg