New stucco does not look like old stucco
Two things have happened to an elevation that has been in Arizona sun since the 1980s. The colour has faded, unevenly, and it has faded differently on each face of the house because the west wall has taken several times the ultraviolet the north wall has. And the texture itself has softened — edges have rounded off, and the surface reads differently under a low sun than a freshly sprayed one does.
So a patch that matches the original specification will still be visible. It is matching the wrong thing: the wall as it was, rather than the wall as it is.
Why the sample board lies
A texture is read by shadow, not by colour. That means the angle of the light is doing most of the work, and a board matched flat in shade or in a garage tells you almost nothing about how the same texture will look on a vertical wall at four in the afternoon.
Knockdown and orange peel are the local vernacular, and every crew that ever sprayed one did it slightly differently — pressure, distance, how long before the knock. It is not a specification you can look up. It is a thing you copy off the wall in front of you.
How it is actually done
Test patches go on the actual wall, in the actual light, and get looked at across the day rather than approved in the ten minutes after they are sprayed. It usually takes more than one attempt, and that iteration is time we put in the programme rather than discover at the end of it.
The repair is then feathered well past the edge of the damage, so there is no line for the eye to catch. A perfectly executed patch that stops abruptly is more visible than a rougher one that fades out.
- Match on the wall, in the light it will be seen in
- Expect more than one test patch, and allow the time
- Feather well past the repair rather than stopping at it
- Check the match across a day, not in the first ten minutes
Sometimes the honest answer is to recoat the whole elevation
Where a wall carries several patches, or where the fade is far enough advanced, three excellent matches will still read as three patches. Preparing and recoating the whole elevation costs more than the repair and less than most people assume, and it produces a wall rather than a repaired wall.
That is a conversation worth having before the patching starts rather than after two attempts at it.
If a contractor offers to match your stucco off a board without spraying a test patch on the wall, they are matching the specification rather than the house.
Questions we get asked
Can new stucco be matched to old stucco?
Yes, but on the wall rather than off a sample board, and it usually takes more than one attempt. Test patches go on the actual elevation, in the actual light, and get looked at across a day rather than approved ten minutes after they are sprayed.
Why does my stucco patch look different from the wall?
Two reasons. Texture is read by shadow, so the angle of the light does most of the work and a board matched flat in shade tells you very little. And the original has faded unevenly, face by face, because the west wall has taken several times the ultraviolet the north wall has.
Is it better to patch stucco or recoat the whole wall?
Where an elevation carries several patches, or the fade is far enough advanced, three excellent matches will still read as three patches. Preparing and recoating the whole elevation costs more than the repair and less than most people assume, and it produces a wall rather than a repaired wall.
What stucco texture is standard in Arizona?
Knockdown and orange peel are the local vernacular, and every crew that ever sprayed one did it slightly differently — pressure, distance, how long before the knock. It is not a specification you can look up; it is a thing you copy off the wall in front of you.
