Caulk applied to bare wood loses its grip as the wood absorbs the solvent out of it. The joint opens within a season, and it looks like bad caulk.

The same paint on the same house lasts twice as long on the north wall as the south. That tells you what is actually wearing it out.

Painting is 78% labor — more than any other trade on this site — so state lines move the price here more than they move a roof or a slab. Here is all 51 states, arithmetic shown.

Cabinets are the one painting job where the paint is a rounding error. You are buying degreasing, sanding, priming and a finish that survives fingernails.

A warm afternoon followed by a cold night gives a film that never properly forms. It looks fine in October and comes off in sheets in March.

Every step up in sheen buys washability and costs you wall. That single trade-off decides every room in the house.

The paint spreads normally. What changes is how many times you have to spread it, and a tinted primer removes one of them.

Primer is not weaker paint. It does a different job, and on new drywall the job it does cannot be done by any number of finish coats.

Contractors quote per square foot of floor and work per square foot of wall. Knowing which number a bid uses is the difference between comparing quotes and guessing.

Exterior prep is half the invoice and the entire reason one job lasts twelve years and the next one peels in three.

On new drywall the second coat uses a quarter less. On a previously painted wall it uses the same. The variable is how much the substrate is drinking.

The ladder trades two things against each other in a straight line: the shinier the paint, the tougher it is and the more of the wall it shows.