[Smudger]

Tricky one - like most things not all zinc is equal ! Zinc itself is soft and oxidation happens easily, however this may, not may not be the same thing we used to plate metal components with zinc passervate and years back car manufacturers introduced this into car and van panels to protect the metal surface and stop rust, if your roof is this then I see no problem.

Personally I'd do a test use some plastercine or modelling clay to make a 1 inch circle place some hypo in it for 30 minutes neutralise with water clean dry and see if you get any colour change/stain

Post your results on here

Darran

[Smurf]

Good idea smudger.

However that would mean I would have to get hold of the same materials used on that roof and roof line which might be a bit difficult to get hold of.

If I can get assurances from the likes of Algoclear pro that their product is safe to use on that type of roof then that will be good enough for me. Rather than buggering about and/or worrying about what damage hypo may cause.

Not only that the big selling point for me and no doubt the client when I hit him with a silly high price is Algoclear pro is approved to be used on K-rend so will not invalidate their property K-rend guarantee.

I know it all might be smoke and mirrors to some and there are other product similar I could use but at the end of the day I want to be able to clean the outside of the building as safely as I can without any detrimental affect to the building surfaces.

[Matt.]

Fair enough it sounds like you going down the I will do the job right at the right price or get someone else to mess about for less.

Let's get back to building this machine, and sort the chemicals out later on

 There's a little 125L tank  in rossendale am not sure how far it is from you on eBay it's on less than a tenner, this with 15 lpm 12v pump into hose reel to say, using normal garden hose on reel with some kind of rectus type fitting, into 8ml pole hose using an old donkey ( brodex pole ) with 4 jets not 2.
Am not sure if 4 fan, 4 pencil or a mix would be best 

Are we some what at were we need to be as far as set up  goes, I know you says you will use a controller but is it better to Maybe have a trigger or an inline tap to control flow and turn off, if ur just wanting to agitate a set area.

[Dave Willis]

can't  pressure washer be used 

What's Hypo like ? Ever been tempted to wash down a conservatory roof with it or add a few ml to your tank?

[CleanClear]

can't  pressure washer be used 

What's Hypo like ? Ever been tempted to wash down a conservatory roof with it or add a few ml to your tank?

Problem with the pressure washer Dave is it mists and atomises everywhere, pretty sure you'd get it everywhere you didn't want. I've never used it on a roof nor ii my tank. I have ran it through hoses though to clean them. Just think Extra Strong Bleach and you're on the right track, thats all it is.

[Smurf]

can't  pressure washer be used 

What's Hypo like ? Ever been tempted to wash down a conservatory roof with it or add a few ml to your tank?

You could use a cold washer but is not ideal as can damage the render if not careful. Not only that it's quite ineffective from my own experience as you need to use something to kill the algae spores not blast them deeper into the substrate. The only suitable type washer to use would be a doff type system (superheated water) that the likes of rhino man and other use for K-rend cleaning.   It's a variable low flow system that due to the extremely high temps it can be set on will kill moss, algae etc.

[Dave Willis]

Ah, right. It's something I know absolutely nothing about (obviously) cheers.

[Frankybadboy]

Ah, right. It's something I know absolutely nothing about (obviously) cheers.

bit like your window cleaning

[Matt.]

can't  pressure washer be used 

What's Hypo like ? Ever been tempted to wash down a conservatory roof with it or add a few ml to your tank?

Hypo isn't any good on glass Dave I tried it recently an I wouldn't use it on plastic frames ever, won't do your tank any harm a few ml, I just wouldn't run it threw the di vessels.

[Smurf]

Fair enough it sounds like you going down the I will do the job right at the right price or get someone else to mess about for less.

Let's get back to building this machine, and sort the chemicals out later on

 There's a little 125L tank  in rossendale am not sure how far it is from you on eBay it's on less than a tenner, this with 15 lpm 12v pump into hose reel to say, using normal garden hose on reel with some kind of rectus type fitting, into 8ml pole hose using an old donkey ( brodex pole ) with 4 jets not 2.
Am not sure if 4 fan, 4 pencil or a mix would be best 

Are we some what at were we need to be as far as set up  goes, I know you says you will use a controller but is it better to Maybe have a trigger or an inline tap to control flow and turn off, if ur just wanting to agitate a set area.

Nope Matty I'v decided I'm going to drop that job after reading this as seems more hassle than it's worth unless soneone has a better idea  http://www.roofclean.co.uk/pdf/AlgoClear-Pro-Safety-Datasheet-2014.pdf

10.5. Incompatible materials
Materials to avoid: Soft metals (aluminium, zinc etc.) Strong acids.

[Smudger]

So you would say it has as many problems as the much hated hypo then ??

Darran

[Smurf]

So you would say it has as many problems as the much hated hypo then ??

Darran

Looks that way smudger but at least you can wash down hypo off surfaces thoroughly and get instant results I suppose   

[Smudger]

 

Just remember to wear the condom suit !!

Darran

[Smurf]

Indeed...

I reckon one 20 ltr container of 14-15% hypo diluted down to 4 parts water 1 part hypo should do all the walls on that building used sparingly... Yehaa!