Tsp cleaner can be used on roofs of all kinds.
Tsp for rusted roof.
Before applying the cleaner spray the roof with water to cool it down.
Diluted in water and applied often with a stiff scrub brush it can remove.
Tsp in a roof cleaning solution has many benefits and should never be skipped here are just a few.
I tried tsp as well as naval jelly letting them sit for the appropriate time in the recommended application temperature range.
After that you will need to clean the roof with trisodium phosphate or tsp.
A paint which will stick well like self etching primer is good and it s necessary if you have real rust.
Wash the metal roof using trisodium phosphate in water at a ratio of 1 cup tsp per 1 gallon water.
Apply your solution with a brush.
You can apply something like ospho affil.
A power washer may remove more of the rust for you.
As with all other uses of tsp cleaner it needs to be diluted usually with cup to two gallons of warm water.
This will remove any scaled rust as well as any flaking paint.
You could rent a power washer or sand blaster but using either of them on your roof tends to be dangerous work and you may not get at all the metal roof rust that needs to be removed.
Thickens the solution allowing much more dwell time on the roof surface allowing for the use of weaker bleach ratio s.
Pour it into a pump sprayer strap yourself into a full body harness tie it down and climb to the roof.
Mix the product with water for a 1 7 dilution ratio a gallon covers about 700 to 900 sq.
When the roof is clean spot prime all rusted areas with a good rust inhibitive roof primer and apply 2 coats of calbar s showerproof wb metal roof paint.
That ll prevent the cleaner from drying out too quickly.
Wait for the roof to dry completely before proceeding.
For stubborn metal roof rust that somehow survives a power blasting try trisodium phosphate tsp.
You can wash it by hand using a sprayer attachment to a garden hose or a power washer.
This is an acid wash that will leave the roof completely clean.
I then scrubbed the roof vigorously with a nylon bristle brush and a metal bristle brush.
This will not only remove scaling rust but will also remove loose paint.
It wasn t so long ago that trisodium phosphate tsp was a go to choice for tough cleaning jobs especially on exteriors.
If the roof has been painted some years before use a drill with a wire brush to eliminate problem rust patches.
Information about the use of tsp or trisodium phosphate in your roof cleaning solution from peerless roof cleaning tampa fl.
Link to product info on amazon first just in the rusted areas if the rusted areas are scattered then paint the whole roof.
For very heavy duty jobs use one cup tsp cleaner to three quarts warm water.