I have an extension to my house that is block built with a low slopping roof that is attached to a very fragile wall that belongs to the neighbour. I completed some repairs to the roof last year and at the minute it seems to be leak free but I know its not that good and only a matter of time before it needs repairing.

I may be imagining it but I am sure I have seen a process that involves a coating that can be applied to the area that can be poured in liquid form and dries to form a 1/2 - 1 inch thick coating that is
water/weather proof and wears well - (could be rubberized resin or fibre glass).
However I do not know
1)what the process is called,
2)what it is made from,
3)whether it is fit for this purpose
4) how much it would cost
5)could I do the process myself or would it need to be installed.

Please help me with all the information you can provide

JEANNETTE NEVILLE, October 2012

could be ashfelt,fibreglass etc its hard to say tbh,but they will all cost you a bomb!it could be acropol which is a fibreglass based paint(normally light blue/grey in colour) that comes in a tin around £60 for a 10ltr tin which if you spread it on thick enough,usually with a brush or broom would be cheap enough and probably something you could have a go at yourself as the instructions are on the tin.however for me if you dont have the experience or a diy head on you,it could get very messy!!and once its on ITS ON!theres no going back.personally i would go with the tried and tested way and have it felted by a proffessional.if it is already watertight i dont see why 1 layer of green mineral wouldnt be sufficeint providing you prime it properly and last a good five years minimum,it all depends whats already down to be honest and thats the same for the acropol by the way.i would normally charge around 250 to go over the old felt with 1 layer on a standard garage (15-20 sq metres) providing theres no water damage to the boards beneath the felt,because then its a case of stripping the lot,renewing the boards then 1 layer of black and 1 layer of green which i would normally charge around 650-750 to do,so if you use that as a rough guide for pricing it up against other options avaliable on the market you should be able to work out whats best for you.hope i was of some help anyways

jimbobly, November 2012