Painting Red Brick White

[Elizabeth5D19]

How can I paint this red brick house but keep all the shadowing and details in the brick? I have tried creating a mask, adding my color, then changing to color mode but it ends up looking black and white.  

[davescm]

A great point Norman. I made the, dangerous for critical colour, assumption that the unreferenced RGB values were sRGB. But if the Lab values are available then that is indeed a better route to accuracy.

Dave

[CarolineTy]

I am trying to do just as you have said but this is greek to me. I am a photoshop novice. I am trying to make the brick in this photo white and the roof  black and I have been working for hours and failing! 

[c.pfaffenbichler]

Partial edit; for the wall and the roof a Hue/Saturation Layer and a Curves Layer might suffice.