How Important Is Exterior Painting Surface Prep?


It’s possible to spend $80/gallon for the best paint with a lifetime warranty and apply six coats. But if you don’t take the time to prepare your surface properly, it will all go begging. The longevity of your Exterior Painting in Katy TX will depend on how well you prepare it.

One of my responsibilities as a paint failure specialist was when I worked for one of the largest coatings companies. From personal experience, I know that most paint failures result from poor surface preparation. Period.

Some people skip prep work because it is time-consuming and hard work. Others do it because they don’t realize how important it is. Still, others don’t know how to do it. Although we cannot predict the job’s difficulty, this week’s article will walk you through each step so that you have the knowledge to do it right.

1.) Clean

Dust and other contaminants can cause house damage. These contaminants can cause paint to stick to the surface and make your house look dirty.

It was easy to see the paint failing due to poor pre-paint clean-up. I could look at the back of a peeling paint chip and see dirt if it was not properly cleaned.

I can also confirm that the store where the paint was purchased will send a representative to your home to go over the same steps as before to diagnose the problem. They will likely refuse to honour the terms of the can’s 20-year, 30-year or lifetime warranties.

Do yourself a favour and clean all areas before you paint. A mid-grade paint will last longer if applied to a clean surface.

2.) Let it Dry

Although it may sound absurd, paint, primer, caulking, and caulking will not adhere to damp surfaces. Your siding will be wet from pre-painting. If you use a pressure washer, it can stay wet for days.

Be safe and allow the surface to dry out for several days before moving on to the next stage. It can be frustrating if you are in a hurry to complete the project. However, this step does not require any physical labour.

3.) Scrape

Most people notice peeling paint by the time they get around to painting. You will need to remove all loose paint coatings from your home until you have bare surfaces and sections of the well-adhered painting. Paint failure is certain if you leave any curled or peeling edges.

multi-tool is also useful so that you can reach tight corners and areas more easily.

4.) Repair Damage & Set Nail Heads

It would help if you repair any damaged or rotted sections of siding or trim at this stage.

Use a hammer to remove any protruding nail heads from the surface.

5.) Sand

Next, Sand all surfaces. This involves sanding any exposed wood and feather-sanding any edges of any paint that is still on the siding. This will make it less obvious that the siding is bare and the coating is still on the siding.

You can either rent or buy an electric sander to do this job. Although a belt sander can work, it can be not very pleasant. A random orbit sander is probably the best option. Get some medium and fine-grit sandpaper. You should start with the medium grit if the surface is very rough. If it’s smooth, you can move on to the fine.

You must remove all dust from the surface after you have sanded it down. This will allow the primer and paint to stick. You have several options. You can use a rag to wipe the dust off, blow it off using an air compressor, or rinse it with a garden hose or pressure washer. Use water only after it is completely dried.

Leave a reply