Painting Red Brick White

You may consider doing the work entirely in Lab Color mode where color adjustment is discrete from tone and texture. No sliders, mninum brush work, editable mask and color and texture. 

Step 1. Create the Mask 

1. Change Mode to Lab Color and choose the Channels panel.

2. Duplicate the  a  channel and choose it (a copy)

3. Choose Curves and increase the contrast as shown

4. Touch up with hard-edged brush to complete the mask

5. Choose layers, add a duplicate layer and add the mask to the top layer

Step 2. Change the brick color

6. Choose Curves and the  a  channel.

7. Change the curve to bisect the grid in the center, horizontally, as shown. 

8.  Repeat with the  b  channel 

The brick color is now neutral gray and maintains the texture of the brick. (The gray value is now similar in lightness to the red brick.

Step 3. Change the gray value to white while maintaining texture. 

9. Bend the curve using its Lightness channel to produce your preference of whiteness, contrast and texture. Color will not change.

10. The mask and Lightness curve are available for tweaking. 

11. Return to RGB Mode

(Duplicate - ignore)

OK I found your colour on line

Do this :

Make sure your image is in sRGB colour space (if not Edit > Convert to Profile sRGB)

Add a colour fill layer RGB value 237,234, 229

Set the blending mode of that fill layer to colour

Add a curve - set the blending mode of the curve to Luminosity

Select the Color fill layer and the curve and group them (right click in layers panel then group from layers)

Add a layer mask to the group based on the selected brickwork

Adjust the curve to get the lightness without losing the brickwork

Dave

Watch this in depth colorizing video by Jesus Ramirez.   I really like his tutorials because I always learn something new from them. 

Make a selection of the brickwork then add a Hue/Saturation adjustment layer set to "Colorize"

Dave

Hi. Try using the brush tool with the color or hue blend mode. Also, you can create a new layer with color or hue blend mode and paint with any tool.

Frequency Separation might also be employed. 

I would start with Image> adjustments> channel mixer, through the brick mask. You want to put the channel with the best texture and detail on the black channel and adjust the CMY to be a neutral cream color. Adjust the levels to fine tune.