Soaker Upstand Sizing

[Watshot]

Hello.

I'm re-tiling my roof and have used aluminium soakers with a 75mm upstand at a wall. Plain concrete tiles (165x268). See picture.

I think it's okay, but I've read that it should have a minimum 65mm upstand for the flashing to cover. The most I have is about 62mm, but it drops to 45mm or so where it steps down at the toe of the tile.

I don't see any other way of doing it with these soakers, but if that's normal, I'll carry on as it is with a 150mm straight cut flashing down to the tile level.

I also have dormer cheeks to do in a similar fashion. Leaded dormer will provide the flashing. However, I have read that the soaker upstand should be increased to 100mm. I can't find any aluminium soakers with a 100mm upstand, which suggests that the industry does not require it. Obviously I can fashion out of lead, but that's a lot more work (I appreciate they may be better than aluminium).

Is it normal to tile up to a leaded dormer cheek with just a 75mm upstand, given my picture above shows that the cover is only 45mm in places? If lead soakers are the only option, that's fine, but it seems odd that for all the different sizes of tile/slate etc, aluminium is only available up to 75mm.

Appreciate anyone's input and advice, thanks.

 

[oldbutnotdead]

I had a similar issue years ago (with mock slates). Nice chap on here (@hardmetalking iirc) sold me a load of zinc soakers 100 x 100 x long enough to deal with the gauge required. Been fine so far.

 

[datarebal]

can you post a picture of where you placed the soaker during tiling? difficult to tell in the picture

 

[Watshot]

I don't have pictures during, but have mocked up an equivalent. Each soaker on top of each tile with subsequent tiles just overlapping the ends of each soaker by 5mm or so. One nail through the tile nail hole to stop any sliding downhill.

 

[datarebal]

Ok that's correct , your soakers will be fine

 

[Watshot]

Thanks, is that coverage okay for a dormer? The suggestion was that 100mm was better, but not available off the shelf?

 

[catlad]

I don't see you having a problem.