I'd like to refurbish the space underneath my stairs, unfortunately I neither recognise the materials that are currently there, nor know if I should replace them with something similar.
So, as shown in the photos:
Should i look to take all of the wood and the plaster board (?) down, and replace it or can i just strip the boarding and replace that, leaving the wood in place?
Secondly, what is the best material for using in this type of space?