Washing House - What Time of Year?

[DerbyDad03]

OK, I'm bored, so here's the silly question of the day. Maybe I'll be surprised and find out the question actually makes sense...

I was painting some trim on a shaded side of the house today and noticed a bit of dirt and mold on the white vinyl siding. I know there are products that will clean the mold and brighten the siding a bit, so I plan to do that.

Since there's not a lot of heavy thing required while painting trim, my mind started to wander/wonder:

Would it make more sense to wash it before winter or wait until the spring - or does it make no difference at all?

In other words, if more mold grows in the fall than in the spring, I should wait until spring and get this year's growth off also. On the other hand, if more mold grows in the spring, then I should attack it now and give the new growth less to feast on.

Look, I said I was bored!

[SteveBell]

It's probably mildew, rather than mold, and it grows all the time. It will surely grow faster at some times of the year. Mildew likes moist, dark, and warm, as I recall.

I would wash it at the time that was most comfortable for me. Oh -- and I would add something that *kills* mildew to the wash process.

[ransley]

Just get laundry bleach and a garden sprayer, then wash it all down. Mold eats paint.