On Friday, 19 October 2018 23:55:54 UTC+1, alan_m wrote:
On 19/10/2018 20:41, Kipper at sea wrote:
On Friday, October 19, 2018 at 1:50:10 PM UTC+1, Muddymike wrote:

Have any of you had commercial type building roof interiors foam
insulation sprayed? If so what did it cost?

I cant find a cost per Sq m just many requests to complete a quotation
request form.

Mike

If its the foam that you refer to is the one that is sprayed to the back of the roof, tiles and lath, it will be the biggest mistake you'll make. If you ever have to do a repair or a slate or tile gets broken, its a very expensive job to do, that if any roofing company will take it on.


My neighbours' house has this spray on insulation[1] but when it was
done the neighbour at the time was sold on it as a cheap method of
stabilising a slate roof reaching the end of its life with more slipping
slates each year. I avoided the "we are next door and can give a
substantial discount if you sign up today" offer for the same service.

When I had my roof replaced a hidden gutter had to be installed between
my roof and my neighbours roof (terraced property). My roofer wasn't too
pleased when he found that my neighbours slates had been glued down with
foam when removing them to install the gutter. My roofer commented on my
neighbours roof as a property to avoid if ever asked to quote for any
work on it.

[1] Foam sprayed to the underside of the slates gluing them to the
rafters/purlins

It makes the slates impossible to get off in 1 piece and re-use. It also traps water against the timbers & makes them impossible to inspect. A crazy idea.


NT