House Cleaning Help Please

[peejicky 14]

I have a client who wants me to remove the mildew/algae from his wood soffits and carport ceiling. The wood is probably spruce or pine and has been painted. The paint is not peeling but I don't want to blast it off with high pressure. I have pics but my file size is too large. I'll have to deal with that later tonight (I'm off to ball practice for now).

I'd like to know how some experienced washers would do the job. My thoughts are to use low pressure on everything from chemical application to final rinsing. I'd also like to know a recipe that would be safe for the wood as well. I use TSP in my roof cleaner mix but do not want to use it here. Is 10.5% SH diluted with water (1:1) and add some Apple Blossom for a surfactant a viable mixture?

Thanks.

[plainpainter 217]

How do you apply, straight - i.e. pump up, downstream, or x-jet - until we know what your method is - and consequently what the final dilution is on the surface - then any answer will be irrelevent.

[Chris S 14]

Do you have a normal house wash you would use on painted wood? If so, use that. When you rinse, either put a small ball valve in your downstreamer line, or pull the hose and and rinse with a soap tip. You could even use a garden hose connected to the house.

[Barry M 73]

Just use your housewash and rinse with low pressure I do it all the time.

[peejicky 14]

I don't have an x jet but I can downstream. I've been cleaning more roofs than houses but gearing up to offer house cleaning in the next few weeks. I cleaned this client roof last year and he wants me to wash his soffits.

The house I cleaned last year was vinyl and I mixed SH 1:1 with water then added a shot of apple blossom then shot it on with my flowjet and wand. I then let it dwell and rinsed with garden hose pressure.

I'm thinking of doing the same with this one but wanted to see if cleaning painted wood was any different than vinyl.