If possible sandblast your roof.
How to remove tin roof.
When removing metal roofing panels it s important to start at the peak of the roof and work your way down.
On march 12th 2014 we installed a new metal roof on a home located in culpeper va.
Spray the entire roof thoroughly.
Start on lowest row of shingles and work your way backwards to the upper part of the roof.
In the live video that we shot on the job site located below here you will be able to see the tin roof and how we are removing it.
Never mix chemicals together.
Start your removal along the top edge in the corner last installed.
Once all the nails are gone nothing is holding the panel to the roof deck it can.
Before we install our new metal roof we needed to first remove the 8yr old tin roof that was put on the house.
The results will most likely satisfy you.
The only real drawbacks with sandblasting involve the time and money required to make use of it.
Sandblasting the same technique used to strip rust and paint off automobiles when restoring them works just as well on metal roofing.
Continue spraying until you see runoff then let the chemicals sit for 15 20 minutes to soak in and begin attacking the mold.
Once each panel is clean rinse it immediately with clean water to prevent streaks and film.
Scrub problem areas with your detergent solution.
Use only one of these substances mixed with water at a time.
Then use a soft bristled scrub brush to remove the stain from the roof itself and rinse with clean water.
Examine the edges of the roof panels to locate the last panel which.
Scrub from the bottom of the panel upward in a left to right back and forth fashion.
Look for screws through the face of the material.
This will prevent the solution from draining in your direction.
How to remove a metal roof.