Flashing Under Ridge Where Three Hips Meet?

[EViS]

I have built a cedar shingle roof and have three hips which meet at one point (see sketch). I will be installing hip/ridge shingles along all three junctions, but am unsure how to seal the point (ridge) where they all meet.

Ideally I would like to mitre the three ridge tiles together where they meet and have some form of discreet flashing underneath. What would be the most suitable flashing product to use and one which will last as long as the rest of the roof, bearing in mind the flashing will be underneath the ridge tiles and will not be exposed to direct sunlight.

Would some simple Flashband last the test of time in this scenario? Or would something like Ubiflex, lead or some other finishing detail be more suitable?

Or would you just install a sheet of lead (or Ubiflex) over the three ridge tiles and make a feature of this?

Untitled

• EViS
• 26 Jul 2012
• 2

 

[SurreyRoofingEstimator]

If you use lead be aware you will have to coat the surfaces that touch the shingles with an isolation coat such as bitumen paint.

 

[EViS]

Thanks for the heads up, I take it that the cedar would react with the lead otherwise?

Should I stick the lead down with the wet bitumen? Or let the bitumen dry on the lead before laying the lead onto the ridge?

I will obviously be hammering nails through the lead to fix the hip tiles. However, the final three hip tiles which meet at the ridge will have their nails exposed, what's the solution to preventing water from trickling along the nail and through the hole create by it in the lead?

 

[catlad]

You could make a feature of the top piece and use a stainless steel screw to fix it down, or something similar.

 

[EViS]

You could make a feature of the top piece and use a stainless steel screw to fix it down, or something similar.

I take it you mean by placing the lead ontop of the hip/ridge shingles? If that is what you mean, I would rather keep any flashing hidden away if feasible.

 

[catlad]

I was meaning some sort of rain guard with maybe a cockerel / weather vain on top with a bolt underneath so you could bolt it down from inside.