If mold or mildew is the culprit spraying with a bleach solution will remove it.
Aluminum siding lead.
If it doesn t change color there is no.
To clean aluminum siding having mildew use a solution of one part bleach and four parts water.
The key to painting aluminum siding is to get it really clean and to use 100 percent acrylic latex paint.
Here is what the epa says at their rrp faq area about removing aluminum.
If lead is present contact a licensed lead abatement specialist.
Some manufacturers produce only 100 recycled siding while others use a significant amount of recycled materials in the production of their siding.
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Check the label to be sure it s recommended for metal siding.
Inspect the siding for mildew powdery paint pigment and mildew.
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Steps for painting aluminum siding 1.
Expect to pay the premium for good paint.
It s easily installed and repaired and it s unlikely to peel over time.
Wait for the test stick to react.
Test old siding paint for lead using a lead test kit.
This is usually a small stick that you rub against the siding.
Unfortunately many older types of aluminum siding do fade however.
Also since aluminum isn t as durable as vinyl there s a higher chance of aluminum getting damaged which can lead to cracks leaks and holes causing it to lose energy efficiency.
Vinyl siding is resistant to cracking warping rotting and will protect against any rodents from burrowing their way underneath the siding.
Something often missed or overlooked is if the original siding under the aluminum siding contains lead.
Buy a lead testing kit from a home improvement store.
Cover ground and nearby shrubs with drop cloths.
If you have to remove that siding too or even just disturb more than 20 square feet of the old siding when removing the aluminum siding then the rrp rule will apply.
Spray this mixture on remaining spots.
There may be stains that are caused by mold and mildew.
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This can lead to a chalky residue coming off of the siding read more.
Rub siding with cloth to check for powdery paint pigment and mildew.