One coat or two coats. 3% or 4% - Certified SoftWash Roof Cleaning

Zach Maynard · SoftWash Systems Certified Applicator

One coat or two coats. 3% or 4%

Josh Scavetta · SoftWash Systems Certified Applicator

for Sodium Hypoclorite i wanted to get a running tally on who is spraying 2 coats and if they are using 3% or 4%

We have been using one coat of 3% but have noticed sometimes it might require a second coat to get all the black streaks out. thinking about going to 4% for just one coat.

Any thoughts?

AC Lockyer · Administrator

On cedar never NEVER go above a 2% solution. Just remember that. Cedar roofs are the only ones I know that over use of bleach can actually remove natural color.

AC

John Aloisio · SoftWash Systems 5-Star Professional

We have not mixed a 4% for roofs yet. Depending on the severity of the stains, we use one coat and touch up with a second. Like Zach said...nasty white shingles almost always require two coats, and sometimes a third touch up coat.

Dan Dykstra · Senior Member

So far I have never had to go above 3% here.

Tim Teed · SoftWash Systems 5-Star Professional

We are now 100% augmenting. 3% roof mixes unless it is really nasty.

Danny Cronauer · SoftWash Systems Certified

We spray every roof with 4%, We do 1 coat, and then a touch up on the very heavy black areas. Most roofs 1 coat is all it takes, no touch ups.
As far as plants go, only burn ups we had were during the summer heat wave week.

Hank Timmermann · Junior Member

Many(80%) of the roofs we service have extremely heavy moss and lichen due to the shade provided in this densely wooded area. We spray these roofs with a 4% plus mix. Other scenarios we spray with with 3%.

Hank