It is currently 28 Mar 2024, 12:07
Deejay wrote:Afternoon Pete
Those nice people at TLC have published this ....
http://www.tlc-direct.co.uk/Book/4.4.1.htm
which gives the maximum spacings.
Cheers
Dave
Commander wrote:Just read through this thread as well, and I have to say I enjoyed it as much as your renovation tread!
One observation I would like to make is that I was surprised to see that you guys use lead on your roofs, here by us the flashings etc are made from galvinzed steel. What is the reason for this? I would think lead is bad for the environment?
9fingers wrote:I'd imagine that dressing steel to fit tile profiles and other shapes would be very difficult and even if you did, the hammering would compromise the galvanising.
Might also be a climate thing. Galvanised sheet used to be used here on sheds but might only have 25 years life before it rusts through. Modern equivalent buildings use a aluminium and foam sandwich with factory made fittings to match the profiles.
Bob
Mike G wrote:Commander wrote:Just read through this thread as well, and I have to say I enjoyed it as much as your renovation tread!
One observation I would like to make is that I was surprised to see that you guys use lead on your roofs, here by us the flashings etc are made from galvinzed steel. What is the reason for this? I would think lead is bad for the environment?
Thanks Erich.
Lead is still absolutely standard over here, probably because it is consistently doing the job it is used for better than any alternatives. I doubt very much of it ends up actually in the environment because it has a very high second-hand value, and everyone always collects old and scrap lead from building projects, and takes it in to a recycler in exchange for some good money. It is turned back into lead sheet with little in the way of embodied energy. Furthermore, it can be made into some very useful shapes without resorting to welding, and is easily worked by any jobbing builder without having to call in specialists (as is necessary with aluminium or PPC steel, for instance).
Andyp wrote:If my roof is typical than lead also keeps the moss and lichen at bay. The only part of my roof that is moss and lichen free is beneath the lead flashing around the chimney.
Commander wrote:I think perhaps the requirement is different, the flashing is placed under the tiles and is not hammered at all, just nailed to trusses or brandering. I suspect our roof designs (generalizing a bit I know...) may be less complicated hence not requiring the flashing to be shaped extensively......
Rod wrote:Lead is also used to cover complete roofs of older buildings especially Churches......
Mike G wrote:Andyp wrote:If my roof is typical than lead also keeps the moss and lichen at bay. The only part of my roof that is moss and lichen free is beneath the lead flashing around the chimney.
Copper is even better for that. In fact, some people will run a copper wire along the length of their ridge so that the cupric oxide will keep their roof free of moss and lichen.
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