Close, but not right on, until you allow for the porosity of the surface being covered. A corrugated metal wall will need one-third more paint to cover it than a flat metal one and you'll find that paint goes 10% farther on wide-lap siding than it does on narrow.
Any surface that is noticeable dry, rough and/or porous will drink up at least 20% more coating than a similar surface that isn't, and you should always figure on using an extra 50% of your paint when applying the first coat to concrete blocks.
By fossil1955 from Cortez, CO
One savings tip is to sign up for a "contractor's discount" at your local paint store. Tell them you are doing a lot of painting and you can typically receive 15 to 20 percent off. You'll be buying good paint at a discount.
Below you can read previous posts and comments about this topic. The discussions on this page has been archived 1 time. Select a discussion and read the feedback here.
(Archived Nov 24, 2010)Calculating the Amount of Paint Needed to a Paint a House
Thanks,
Judy from Birmingham, AL
Feedback:
By Dean
http://www.behr.com/behrx/expert/calc-choose-ext.jsp?subnav=extcalc (09/28/2006)
By mef1957
http://www.improvenet.com/HomeOwner/ProjectTools/Calc/paint.html
Although this is for the interior of the house, the basic rules still apply!
1gal. of paint per 400 sq. ft and if you don't have a Wagner Spray Gun, invest! (don't forget to buy thinner for the gun also) (09/29/2006)
By SweetCali40