Angle of lead slate

[Possom]

The diagram below shows a 5:12 roof pitch. From this, I've calculated the angles and included them, they are, 67.4° and 22.6°.

A soil pipe will project out through the kitchen roof, after having being brought from the 1st floor bathroom toilet and immediately through the bathroom wall which locates it within the ground floor kitchen roofspace.

I therefore require a lead slate (in grey on diagram) produced with a specific angle (in blue). This angle is between the lead slate and the attached lead pipe.

For the angle, I was thinking of 22.6° - 2.5° = 20°.

What do you think?

 

[denso13]

Does it have to be lead? A Macflash RS1 has a lot of play in it and doesn't have to be exact.

 

[Possom]

Does it have to be lead? A Macflash RS1 has a lot of play in it and doesn't have to be exact.

I had thought that since traditionally a lead slate is used for such purposes, that perhaps the type of product you refer to is more a temporary fix. Perhaps I am incorrect?

Would the rubber seal which is positioned exactly vertically straight up from the base be able to bend down by 70 degrees from the vertical, that is, 20 degrees from the horizontal base plate?

 

[denso13]

Not temporary at all but finding a 70° one might be an issue.

 

[Possom]

Not temporary at all but finding a 70° one might be an issue.

It is possible to have angled lead slates produced on a one-off basis, so I could probably have one made specially.

 

[Jackrae]

Just make sure you give them an explicit drawing showing how you want the angles arranged. It took my stove installer 3 goes before the lead flashing maker got the angles correct (even with a drawing) And before anyone asks -- no, the flue did not come out at a shallow angle.

 

[Possom]

Would anyone happen to know if a weathering collar would also be required to attached between the lead pipe (from the lead slate) and the attached plastic soil pipe?

http://www.screwfix.com/p/floplast-sp300-weathering-collar-black-110mm/25918

 

[Jackrae]

Think that would look a right dog's breakfast. I'd have thought something like http://www.wickes.co.uk/Calder-Lead-Sheet+Flashing-Sealant-310ML/p/240088 will be all you need to keep out the creepy crawlies and prevent rain blowing up. Though the Wickes supplied versions appear to have had some bad reviews.

 

[Possom]

Think that would look a right dog's breakfast. I'd have thought something like http://www.wickes.co.uk/Calder-Lead-Sheet+Flashing-Sealant-310ML/p/240088 will be all you need to keep out the creepy crawlies and prevent rain blowing up. Though the Wickes supplied versions appear to have had some bad reviews.

Cheers!