Filling cracks in walls might seem simple, but skipping this crucial step can render your efforts useless

Filling a hole in a yellow wall with filler and a filling knife.

Whether you're taking on a whole house renovation, adding an extension, or simply sprucing up the space you have, they'll be some tasks you'll gladly leave to a professional, and others that you may be willing to try out yourself.

Patching up holes or cracks in plaster is one of those jobs that can often fall into a DIYers remit.