With the OPs stated works is one of the products beneficial or would it be easier to just pressure wash without a spray?
Rob
Rob I don't understand the question.
Andy
Phone the frenchman for a price 01628 687 022 .Use my account if you wish. I think it's around £80 per 5 litres.Diluted at 50:1 thats enough to do about 1000sqm of med porous material (concrete tile etc) Slates and rosemary's you will get about 1200/1300 sqm.
The roof really needs to be free of big clumps of moss else regrowth is possible.
We usually put up a ally tower to gutter height and use extending aluminium decorators poles with various scrapers and brushes attached to roughly clean the roof up first. This all depends on access, shape of the roof etc.
Clean the gutters from the tower and blow the downspouts (just like Robs Thai "friend") out from the bottom with a back pack blower.The clean up is very easy as the moss is dry and not sprayed all over the neighbourhood! Back pack leaf blowers and plastic rakes sort the floor out and the moss can go on the compost pile or in the "green bin".
You are then ready to apply the quats. We do this through a carbon wfp with a size 10 pw nozzle (this insures the droplets are of a large enough size to reduced spray drift.) Mix a barrel of quats and apply through your pw at tick over. Apply from the top down ...if it is running into the gutters you are applying to much.
Using this method we rarely return to clean the gutters other than the yearly gutter clean we have also sold to them!
Any of the quats products will work but Moss go is mixed at 50;1 if the others are only mixed max at 15:1 that tells me something....maybe somebody has done some mixing previously...waters cheap
. The last thing you need is to be going back and doing it all again because you saved a fiver here and there. Quats are cheap for the amount of work they do and the quantity you will use...it will cost you maybe £10/20 to buy enough of the "good stuff "to do your job. Compared with £5/15 of the others .
My number is 07973216502 if you have anything you wish to discuss furthur.