Help me with how much paint

Splais

I am going to help a friend paint his house. It is a cement block house, 50x25 feet and current paint is in excellent condition (he wants to change color). We will be using an airless sprayer. The house is currently a sand color that he wants to change to gray.

Can someone help me with an estimate of how much paint (gals) will be required? Thanks.

jsheridan

Interior or exterior?

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Splais

Exterior

cdaniels

I would start with 5 gallons and see how far it goes but I roll not spray.More than likely you will need two coats for a color change and after you use a fiver you will be able to judge about how much more you need.

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Charlie Daniels painting and repair

jsheridan

Cdaniels gave the best answer splais. There are more questions that need answers and a lot of variables besides.
I would heed his advice also about rolling versus spraying. There's a lot of work involved with masking, the possible hazards of breeze painting the neighbors property, and the loss of material. Estimate for about 25 percent more material usage. And then there's the lost productivity of learning to use it properly and effectively, after you set it up and before you clean it up. By the time you factor in all those considerations you'll have it cut and rolled and be done with it.

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joecaption

Make sure to pressure wash the house before painting.

Splais

Not trying to argue, just learn.

Recently I just painted a 10x10x8 wood storage shed. I also just put a bead board ceiling on my 50x10 foot patio ceiling and reprinted the whole thing. I used a Wagner airless sprayer on both products. Even with masking and drop cloths, plus using a large paint shield were I could. It was much easier, much less messy and much quicker then the times I've painted with rollers. It also did an excellent job. I've read other comments about "you should roll". I must be missing something because I think rolling is messier, takes longer and does not cover as evenly as taking your time with the sprayer. I also don't understand your "lost paint" comment? /Steve

ToolSeeker

OK I'll take the other side. Figure about 350 sf per gal. of paint. Go to Sherwin Williams and buy a hand masker and some plastic rolls of different lengths, this will reduce masking time so much you won't believe it. Don't spray on a windy or breezy day. Be a good neighbor tell the ones beside you they may want to move their car or put it inside. And spray away, and yes pressure wash the house first.