Draught-proofing doors that lead to 'unconditioned' spaces (i.e spaces that are not heated or cooled including your laundry, bathroom and spare rooms) can make a huge difference to your comfort and energy bills.
In this GIY video I show you how to draught-proof an internal hinged door with draught-proof tape. It's an easy GIY job.
You might also need to draught-proof under the door if there is a gap. I've got the GIY video on how to do that here or just use a door (ssssss) snake.
Once it's done, you just have to remember to keep the door shut. That will be the hardest part of this GIY job.
Trickiness rating: Too easy (can do in your PJ's before breakfast)