Flat roof dormer

[stagman]

I am having a dormer window installed and this has a flat roof. The plans specify code 5 lead but I am considering zinc as I have two existing dormers which are covered with zinc and seem perfectly fine. I have checked with the local building control and they are happy with that.

The flat top area of the dormer is approx 3.25m x 1.75m.

My question is what sort of cost would this be for lead and would there be a significant difference for zinc? The builder has allowed about £2500 for the roofing contractor for the code 5 lead and says the zinc would cost the same. Would this sum be reasonable?

 

[freddiemercurystwin]

Zinc is cheaper, presumably £2500 is for the whole lot?

Out of interest if you have two existing zinc ones why did your architect spec lead?

 

[stagman]

The cost is for just the new dormer. Does that seem reasonable?

I don't think the architect realised the exising ones were zinc. He just specified lead as that is presumably the best.

 

[stagman]

Anyone any ideas about how much this should cost, roughly?

 

[henseyroofing82]

roughly, I would say the lead itself would cost £500. and the labour about the same

 

[hardmetalking]

It shouldn't cost that much for zinc!!

It does depend on the details needed to interface the other roof but zinc is the cheapest of the metals we use so therefore should be cheaper than lead to supply and fit otherwise we wouldn't be competitive.