How to Remove Exterior House Paint Bubbles

What You'll Need
Paint scraper
Sandpaper
Bucket
Liquid soap
Water
Cleaning brush
Garden hose
Water repellent sealer
Paint brushes
Primer
Exterior paint
Protective eye wear

One of the main problems you'll have to contend with when applying exterior house paint is paint bubbling. Painting the exterior of a building on a sunny day can cause the paint to dry too quickly. Heat vapors that become trapped inside the fast-drying paint begin to expand. The expanded vapors cause bubbling under the paint.

Dark colors of exterior paint can absorb more heat and consequently have more bubbling problems than light colors of paint. Moisture can also cause bubbling problems in exterior paint. The moisture can become trapped under the paint and cause it to expand. Moisture problems can be caused by the weather and by faulty overhangs and gutters.

If you have bubbles after painting the exterior of your house, there are a few steps you can take to get rid of them.

Step 1 - Take Safety Precautions

Be sure to put on your protective eyewear before you begin your work.

Step 2 - Open the Paint Bubble

Use a scraper to carefully open the paint bubble. Inspect the inside of the bubble. A moisture problem would result in unfinished wood behind the bubble. A heat problem would result in a visible layer of paint behind the bubble.

Step 3 - Solve Moisture Problems

Find the cause of any moisture or heat problems you might have and, if possible, fix it immediately.

Step 4 - Wait for the Paint to Dry

Allow the surface about two days to dry. It is difficult to remove bubbles from wet paint.

Step 5 - Remove the Bubbles

Use the scraper to remove all the visible bubbles and any loose paint. Use the sandpaper to smooth the bubbled paint area and 12 inches of the surrounding wall.

Step 6 - Clean the Paint

Three paint cans and paintbrushes.

Fill a bucket with warm water. Add three squirts of liquid soap to the water. Combine the contents to make a warm, soapy solution. Immerse the scrub brush into the bucket. Shake off any excess water. Use the scrub brush to carefully clean the area. Use the garden hose to rinse the area with water.

Step 7 - Apply a Water Repellent Sealer

Read the instructions provided by the manufacturer before you apply the sealer. Following the directions, use a paintbrush to apply the water repellent sealer to the wood to prevent any further moisture problems. Allow the sealer about two days to dry completely.

Step 8 - Apply a Primer

Read the instructions provided by the manufacturer before you apply the primer. Following the directions, use a paintbrush to apply a primer to the area. Allow the primer about two days to dry completely.

Step 9 - Repaint the Area

Repaint the smoothed and cleaned area on a cool or overcast day. Read the instructions provided by the manufacturer before applying the paint. Following the directions, use a paintbrush to apply a thin coat of paint to the area. Allow the paint enough time to dry completely. Continue painting thin layers over the area and allowing the paint to dry until the entire area is fully covered.