A paint sprayer can save you an enormous amount of time when you’ve got something that needs a fresh coat of paint. But…how much spray paint do I need?
When using a spray gun for paint, you’ll need to have some extra paint on hand to get the job done.
And it really depends on the type of spray gun that you’re planning to use.
Even with your best efforts to reduce paint splatter, a spray gun will always leave atomized paint in the air.
It depends on what type of spray gun you have chosen for your job. This changes the amount of paint you will need to budget for your job.
Paint Use Ratio
|HVLP Sprayer||20% More|
|Airless Sprayer||40% More|
|Sprayer (Poor Spraying Technique)||Up to 50% More|
With An HVLP spray gun, you should plan to have about 20% more paint on-hand than you think you'll need. This paint budget will make sure you have enough to get the job done.
Most folks use their HVLP spray guns outside for painting exteriors or fencing.
A standard ratio for using this type of spray gun is about 1.5 cans of paint to 1 can of paint for a roller. But depending on how much PSI you use, your ratio could be 2:1 or even 3:1 on a windy day outside.
With an airless paint sprayer, you will use 40% more paint than if you brushed or rolled. That means 40% of the paint that you're spraying ends up somewhere else besides your paint surface.
Poor spray techniques can increase this ratio to 50/50.
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High Volume Low Pressure (HVLP) spray guns are fairly comparable to brushes and rollers in the amount of paint that they use.
This is because the flow result is very predictable and you’re usually within 10-12 inches of the surface being painted. Painting closer to the surface reduces the amount of paint pollution that you put into the air.
With this type of spray gun, you should plan to have about 20% more paint on-hand than you think you’ll need.
Using a high pressure spray gun with an air compressor atomizes a lot of paint into the air.
You can avoid some paint waste by using a gravity-style paint gun, which accepts the high pressure rate. But this is an added cost to your tool investment.
This type of spray gun tends to have a premium price point and can cost up to 4x more than your basic paint sprayer.
Airless paint sprayers are great for work that needs to take place above your head – such as with a ceiling.
With this type of sprayer, up to 40% of the paint that you’re spraying from the gun is going to end up somewhere else besides the surface you’re painting.
You will also need to make sure your spray gun tips are in good working order. You can multiply your paint use by 2-3x just because you’ve got a blow tip or one that has been overused.
Remember that backrolling may also be necessary to even out the coat of paint that has been sprayed onto the surface.
Keep these tips and ratios in mind before you get started and you’ll be able to save time on your project even if you are using a little extra paint.
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