Who can deny, that mirrored ceilings make interesting design choices? It works wonders at expanding the space in Martyn's cool 'Palm Springs' black and white kitchen, but does that mean we can consider a mirrored 5th wall elsewhere? 'I think any room could be a good candidate, as long as you've created enough of a foundation where it makes sense,' says Cliff. As with all DIY projects, in the sense that you are bringing a design to life without a professional in the field, you need to be certain that it is going to work with the rest of your space.