Avoiding wet paint overspray is an important precaution during exterior building spray application. Although a highly productive method compared to brush & roll, spray painting requires more protection of adjacent unpainted surfaces.
Field applied spray methods include airless spray (pure atomized paint), electrostatic, HVLP (High Volume, Low Pressure), and air-assisted airless. Choice of methods will depend on component substrate, material types, and daily environmental conditions. Electrostatic, HVLP, and air-assist are all fine finish spray application techniques. Airless is the high production method mostly used in the industry.
Masking, plastic sheeting, drop cloths, and simply moving objects a safe distance away are the processes used to protect unpainted items from overspray. Our contracts normally read: “Carefully protect tenants, public, and adjacent unpainted surfaces as needed.”, and our crews are trained to it.
Vehicles owners adjacent to paint jobs can sometimes have concerns and be prone to inquires of overspray. In over 30 years of painting in the valley of the sun, MTS has never had a true car overspray issue that a simple carwash couldn’t handle. These incidences have been very few, and we don’t plan to have anymore. We constantly educate our painters and foreman to handle the situation before it arises. “Do it right the first time” is our motto, and recently in our crew meeting I shared a great quote by Coach John Wooden; “If you don’t have time to do it right, when will you have time to do it over?”
Most of the time dryfall is the culprit in vehicle overspray inquiries. Acrylic paints (latex) dry very quickly in our environment of low humidity. Fine overspray dust bouncing off surfaces being sprayed will dry within 10 feet on the average day. As long as there’s no moisture available to rewet the paint when it lands it will be harmless. It will look like normal Arizona dust on horizontal surfaces, picture a very minor dust storm residue. In a few instances we have had tree sap be the culprit too, especially in the spring. The sticky fine sap collects dust and can look like overspray. Again a carwash will solve the issues most of the time, and plus there are other removal methods that can be employed if needed.
MTS will make judgements constantly during the job and will modify painting processes to protect adjacent items as needed. There are multiple environmental aspects we monitor for a proper paint job such as wind, rain, dew point, cold, and heat. We will halt certain operations and move to other processes as needed depending on the job.
Repainting occupied buildings is what MTS does and we match processes and crews to this type of work. We are NOT new construction painters that stand back and blast the building with paint not concerned with adjacent surfaces (that are not installed yet!) MTS’s expert employees are very controlled in our spray patterns and very intentional in all phases of the project with the customer’s outcome in mind.
I hope this information helps relieve any concerns regarding overspray. God forbid we have an equipment failure, accident, or a major misjudgment, but that’s why we pay the cost of general liability insurance. We want our customers to know we will take care of them and their property with dependable business practices, safety, and efficient craftsmanship.