If you need to paint a metal roof on a pole barn, there are a pair of important factors you should consider. First, because metal is slick and nonporous, it must be conditioned to accept paint adhesion, or the finish coat will peel and chip away soon after application. In addition, because the roofs of most pole barns do not offer the stability required to support standing or walking, you will need to use a specific application technique, or you may end up falling through the roof and suffering a serious injury.
Things You'll Need
- Extension ladder
- Pressure washer
- 5-gallon bucket
- Ladder hook
- 2 nap roller covers
- Roller frame
- Roller extension pole
- Heavy-duty fabric drop cloth
- Etching primer
- Exterior acrylic latex paint
Access the metal pole barn roof using an extension ladder. Do not climb onto the roof or you may fall through.
Clean the roof using a pressure washer. Remain on the ladder as you spray the roof. Do not climb onto the roof. Clean as much as you can from your current access point, and then move the ladder to reach the remainder of the metal roof. Allow the roof to dry out completely.
Fill a 5-gallon bucket to one-third its capacity with etching primer. Attach the ladder hook to the handle of the bucket. Affix a nap cover to the roller frame and screw the frame to the extension pole.
Scale the ladder with the 5-gallon bucket in hand. Affix the bucket to the side of the ladder using the bucket hook. Hang the bucket about four feet from the top of the ladder.
Descend the ladder and gather the rolling extension pole. Ascend the ladder with the extension pole in hand.
Apply a coat of etching primer to as much of the roof as you can using the extension pole. Apply while standing on the ladder. Do not step onto the pole barn roof.
Descend the ladder with the rolling pole in hand. Set the rolling pole on a fabric drop cloth. Ascend the ladder, and remove the bucket. Descend the ladder with the bucket in hand.
Move the ladder and repeat steps four, five, six and seven until the entire metal pole barn roof is covered.
Allow the etching primer to cure for fours hours, and then apply a coat of exterior acrylic latex paint to the roof in the same manner as you did the primer.
Tips & Warnings
- Read the safety instructions on the side of the extension ladder before you begin work to avoid unnecessary injuries.
- Always keep one hand firmly grasped to the ladder during the application process.
- Photo Credit Creatas/Creatas/Getty Images