There are many steps involved with evaluating, preparing, and painting different types of home siding if you want to achieve professional results. In today’s post Mile High Coatings will cover some of those steps starting with the most important part: surface preparation.
Evaluating Your Home Siding’s Current Paint
Every professional home painting job by Mile High Coatings of Fort Collins begins with careful preparation. This can be a time consuming process, but it is a critical step for that perfect result. Some important things to look for include:
- Rust (In the case of steel siding)
- Powdery residue
- Peeling of previous house paint
- Cracked, missing, or split caulking
- Corrosion
Prepare Your Metal House Siding for Painting
The first step is to give your home a good once over with a high quality soap wash. Power washing is an even better solution, but be very careful. Power washing should be done by one who is experienced with power washing. Particularly in the case of aluminum siding, a misapplied power wash stream can damage your siding, blow sections off, or cause water to rush up behind the siding and cause leaks in your home. If you need a professional to give your home a high quality power wash, feel free to give Mile High Coatings a call! Don’t be alarmed if you see some old paint being washed off… this is perfectly normal and desirable. Keep rinsing off the surface until there are no detectable paint chips or dirt in the runoff water. Once done, allow your home to dry off completely.
It is also important, in the case of steel siding, to remove any rust prior to priming, as primer typically has problems properly adhering to rust, and the tendency for the metal to continue to oxidize will eat away at the foundation of your new home painting job. Rusty areas should be removed using a wire brush or via sanding, which will also remove loose or chipped and rusted metal. Next, the oxidization process must be neutralized using a rust converter. These typically work by converting the rust into a black stabilized metal which is then ready for primer.
Repairing damage to sealants and caulking will be dependent on the type of siding you have and the method with which it was installed. You will typically use a elastomeric or silicone-acrylic caulking for the best results. Make sure you include areas around windows and doors where needed.
Pick the Right Primer for Your Metal Type
This step is as important as using high quality paint on your home. The primer acts as a bonding intermediary between the metal and the paint. Additionally, the primer acts to keep the metal from touching the paint directly! The reason for this has to do with chemistry. Most types of latex house paint as well as many types of primer contain ammonia. If, for example, ammonia comes into contact with oxidized aluminum, it releases a gas that results in small bubbles forming under your paint job. Not only does that look bad, but it greatly reduces the lifetime and resilience of your house paint. If the bond between metal/primer/paint is broken, there will be poor adhesion and the paint will begin to prematurely separate from your home siding.
There are many ways to mitigate this problem. One common method is to thin down an oil-based metal primer with paint thinner. Generally the ratio works out to about one gallon of high quality paint primer to a pint of paint thinner. There are other methods available however, and it does depend on your specific situation. If you have any questions you can always call Mile High Coatings and ask!
Painting Your Steel or Aluminum Siding
After your preparation is complete it’s time to choose the best exterior paint and application method for your house painting project. The most common exterior painting method for aluminum and metal siding is brushing, or spraying for the most even coat. High quality 100% acrylic exterior paint a good choice for painting metal siding in the dryer Fort Collins environment. Selecting a satin sheen coat will shed water more easily than a flat coat, and will thus look better for a longer period of time.
If you have any questions or comments about this article, or are interested in a FREE paint estimate, please give Mile High Coatings a call today at (970) 214-1703, or contact us online here!





