chooseusername wrote: » I had this red algae stuff on the walls I used that Mossgo stuff and it worked well, but my walls were smooth render. It hasn't come back in 4 years, but having said that I also removed a lot of the trees around the house, and the airflow and light was improved.
Deagol wrote: » Local DIY shop recommended using moss killing stuff for the lawn on it. I sprayed half the wall to see and left it for a week or two and the stuff was almost 100% gone.
jack of all wrote: » Pretty much as above- I had some bad discolouration on a dashed wall (white sand cement butter coat) from red algae; the house was built about 18 years at the time. I sprayed the walls with a solution of thick bleach/ water and a little washing powder added in. I did this about two years ago. Initially the result was a little disappointing- the algae turned red, but after some time, exposure to the sun and rain the render returned to pure white and looks really good (especially comparted to neighbouring houses) nearly two years later. Just make sure you spray ona still day (I used a knapsack sprayer) as the spray will drift!
Plumbthedepths wrote: » I spray the walls with diluted bleach and water. 50:50. I do it every year. Works a treat and a 2 litre bottle of thick bleach is 92 cent in Aldi. If the red goes orange just spray again, it will come off but needs a little time. Also diluted Jeyes fluid is great for getting rid of moss on a roof and biological washing powder ( Aldi again)is good for killing moss on a tarmac driveway.
wait4me wrote: » I would use a half and half bleach water mix. On a dry day spray it on. After an hour or so; hose it down. Might need a second spray. Trick is to leave it before hosing. Works for me on pebble dash or rendered walls. I think the stuff you got from the farm suppliers is also a similar mix. I think its clorox? That too should do the trick but a little patience is required whatever you do. Let the stuff work before hosing down.
twowheelsonly wrote: » A crowd called 'Red Gable Cleaning' (I think..) seem to be the people to talk to on this. I've never had this problem but plenty do including my brother. Power washing is only a waste of time and effort as are bleaches etc. They did his place and while it made a nice difference straight away it was in the following weeks that it really improved as the algae died off. As far as I know they're Longford based but I'll see if I can find a link for them. EDIT: Found them !! http://www.redgablecleaning.com/gallery.html
Wexford96 wrote: » Hi. I don't think it's called Clorox, but it might have Clorox in it. It was a made in Ireland product called "red algae remover".
Cerco wrote: » I think you mean Chloros Hypachloride. You should get it in farming co-op as it is used in cleaning milking parlours (I’m told). Costs about €20 for a €20 litre drum. Follow safety precautions on container. You can use it diluted in a backpack sprayer wearing mask, goggles and gloves.
Wexford96 wrote: » Hello. I've had a red fungus type thing on the pebble dash of house. It's been there for approx. 15 years. I've googled a bit this week on how to get it off. I've already power-hosed it- this took dirt away but not the reddish stuff. Wire brushed bleach into part of it-this too approx. 10 percent of it away, and turned it more orange than red. Then I bought a product from the farm suppliers that they recommended. I sprayed this on, waited 15 mins as instructed, and hosed the surface. This has had no effect. Is there any other way to get this off the wall? Thank you.
Wexford96 wrote: » Hi. Did you ever rinse it down with water afterwards? Or did you just leave that mixture to seep into the wall without rinsing? Thanks.
twowheelsonly wrote: » Chloras will clean it but won't kill it. You'll have the same thing within a year, or possibly even less. Bleach mixtures are the same. Biological washing powders / solutions are a better option but don't seem to work on walls as well as on flat surfaces. Possibly because they run off too fast ? I used a biological powder on a concrete driveway in the front and on pathways in the back two years ago and it did a superb job. I dampened the ground and spread it fairly liberally and let the rain do the rest. Took a week or so to really clean it up but worked brilliantly.
Cerco wrote: » Just reading your post again. If it is chloros then Fifteen minutes is way too short for it to do its job. Leave it for at least four or five hours before washing it off.
Wexford96 wrote: » Managed to get it off the wall finally. Chloros Hypachloride as recommended by Ray and Cerco here. Just sprayed it on from the backpack sprayer I use for roundup. Covered the wall making it as foamy as I could to avoid it just running down wall. Then came back after 3 hours with the power washer. And off it came. Was delighted to see dark red water running down the drain. Thanks for above replies to all of you who helped.
Baoithin66 wrote: » any recommendation for moss on trutone slate roof? Would Chloras be too severe???
twowheelsonly wrote: » A crowd called 'Red Gable Cleaning' (I think..) seem to be the people to talk to on this. I've never had this problem but plenty do including my brother. Power washing is only a waste of time and effort as are bleaches etc. They did his place and while it made a nice difference straight away it was in the following weeks that it really improved as the algae died off. As far as I know they're Longford based but I'll see if I can find a link for them. EDIT: Found them !!
