If you’re getting the exterior of your Northern Kentucky home painted and your contractor hasn’t mentioned pressure washing, that’s worth asking about. Here’s why it matters more than most people think.
Paint Sticks to Surfaces — Not to Dirt
Exterior surfaces pick up years of dirt, mildew, chalking paint, pollen, and mold. You can’t always see it — especially on lighter surfaces — but it’s there. When you paint over it, the paint bonds to the contamination layer instead of the actual surface. That’s why paint on dirty surfaces peels faster, even with high-quality products.
Pressure washing removes that layer. It gives the new paint a clean, solid surface to bond to, which extends the life of the paint job by years. It’s not optional prep — it’s the difference between a paint job that lasts 8 years and one that looks tired in 3.
Mildew Is a Bigger Problem Than It Looks
In Kentucky’s humid climate, mildew on exterior surfaces is common — especially on north-facing walls, under soffits, and near the roofline. If you paint over mildew without killing it, it grows through the new paint. The result is dark spots and premature paint failure within a season or two.
A proper pressure washing with the right cleaning solution (not just water) kills mildew at the surface level before the paint goes on. This is standard practice for a professional paint job. If your contractor isn’t doing it, ask why.
How Long to Wait After Pressure Washing
This depends on the surface and the weather, but in most cases you should wait at least 24 hours — and ideally 48 hours — after pressure washing before painting. The surface needs to be completely dry or the paint won’t adhere properly. In humid conditions, give it more time.
A professional company will schedule the wash and the paint separately to account for drying time. Rushing this step is one of the most common shortcuts that leads to paint failure.
Do You Need a Separate Company for the Wash?
Not if you hire the right painting company. NKY Home Service handles both. We pressure wash the exterior surfaces, let them dry properly, and then apply paint. One crew. One schedule. No coordinating between two separate companies. It also means the same team that washed the surface knows exactly what condition it’s in before they start painting — which leads to better results.