A third note about chlorine bleach: Bleach does not clean.
It brightens. White clothes, washed without bleach will be clean, but they'll also be dingy. So, if you want a clean dingy house, don't use bleach. Also, bleach in a concentrated state is
effective then diluted bleach in solution. Therefore it is not necessary nor advisable to ever mix bleach at concentrations greater than a 10:1 ratio (10%). Our mixing instructions above allow for a 16:1 ratio (7%) of chlorine bleach. By following our mixing instructions the final cleaning solution will contain less than .2% (thatís less than 1%)
How to properly wash siding
ďItís in the process, not the pressure!Ē
There is no need to blast the side of a house with 3000 psi. In fact, pressures washers leave streaks, break window seals, put hash marks on wood, force water under the siding and defoliate plants. Pressure washers have a place; cleaning driveways, cleaning construction equipment and cleaning decks,
but not siding.
If you insist on using a pressure washer, it is best to use it
for rinsing only. Reduce the pressure to only a couple hundred pounds by adjusting the regulator valve, unloader or using a larger nozzle, such as a chemical tip. The chemical injector of a pressure washer may also be used to apply the cleaning solution, but be forewarned, you will use an excessive amount of chemical, thus
driving your job cost up.
Place your machine so you can wash one side of the house at a time then begin spraying the siding
from the bottom up. If you spray from the top down, clean streaks will appear on the siding, and you donít want that to happen.
More than likely you will not be able to reach the eave or soffit without using your extension. Therefore, the quickest way to perform the job is to spray and rinse the bottom half, going completely around the house, then attach your extension and go around a second time to get the top part. Again, apply the chemical from bottom up. Sorry, some house may require a ladder.
The chemical should have a dwell time, ideally, of about 5 minutes. However, the chemical could begin to try quicker on a hot sunny day.
Do not allow the chemical to dry before rinsing. Let it dwell as long as possible but rinse before it dries. This means you will have to spray and rinse sections at a time.
The siding should be
rinsed from the top down, with the garden hose using street pressure. You will be amazed as the dirt, mold, webs and stains disappear before your eyes with just a souped-up garden sprayer and a garden hose.
Remember the rule: Apply chemical bottom up, rinse top down
When youíre finished, rinse your machine with clear water, pack up your stuff, collect your money and go to the next job.