How to Patina Copper Gutters

Copper gutters naturally take on a greenish patina over time.

Copper fixtures naturally take on a green patina after aging for some time, but there are steps that you can take if you wish to have the patina occur earlier. Copper gutters with a greenish patina give the home or building an antique charm and curb appeal. Patina can be applied while the gutters are cold and attached to the house if care is used during the application process. A sealant keeps the color staying fresh in the outdoors, so you may want to apply one after the patina has been achieved.

Things You'll Need

• 1.4 oz. calcium chloride
• 1.4 oz. cupric nitrate
• 1.4 oz. ammonium chloride
• 1 gallon distilled water
• Digital scale
• Ladder
• Protective gloves
• Bucket
• Rags
• Clear outdoors sealant

Instructions

1. Climb on your roof and wash the gutters using soap and water. Dry with a cloth. Make sure to remove all grease, dirt and other debris from the gutters.

2. Mix 1.4 oz. each of ammonium chloride, cupric nitrate and calcium chloride in a bucket. You should measure these amounts first using a digital scale so that your measurements are accurate. Add distilled water until the bucket is filled to the 1- liter mark. This is your first batch of patina.

3. Wipe the rag with the solution over the gutters evenly. Allow to dry for at least 30 minutes.

4. Repeat the patina process until the right color has been achieved. You may need to mix more patina solution if you have a large house with many gutters or want a greener hue.

5. Apply sealant to the gutters after finishing the patina process. This will help the patina to remain the same color for years to come.

Tips & Warnings

• Be careful not to allow the solution to drip on you or on other areas of the house, as it may cause discoloration.

References

• Science Company: Patina Formulas
• Gutter Works Inc.: Copper Gutters