I wouldn't sit him down. I would stop allowing him to " be tired" " opt out" "not engage" So he comes home tired fine.. Doesn't mean he can opt out of parenting.
Call him constantly make a nuisance out of yourself until he comes to help
Send the children to ask him for stuff
go tell him you need him to go do x
Then tell him Y has to be done by x time etc etc until everything is done
Sunday leave go do what you want to do and to begin with leave him a list of what has to be done
Ensure he knows children can NOT be left to watch tv/play computer games for the day so on list add something for him to do with the kids
Once you return if the list is not finished tell him to get on with it until the list is. Point out this was what YOU did Saturday (obviously take part in the putting children to bed etc however the cleaning he didnt do that is his to deal with.
TOGETHER you work out the stuff needed for the next week.
One of the reasons why this is happening is because you LET him do that.
Years ago I started working many weekends. To begin with I would come home to a tip. I pointed out over and over again for dh what He had to do to ensure it didnt look like that.. YES to begin with the kids watched more tv than I was ok with . However as time went on they also got to go on bike rides with dad and to the park and they went in the garden with him.. Dinner was made when I came home.. Ok the cleaning was not always to my standards but He had done a darn good stab..
he has a good relationship with the kids. They can laugh at his lack of wish to do x things with us now (it is his idea of hell to go to a National trust place for example - so we dont take him)
It took time. However he learnt because he HAD to learn.. I didn't engage in it as at the time we needed me to bring in that money.
We have currently gone through something different. I was a SAHM for many years (bar the weekend work) 2 years ago I started working full time. It took a LONG time before he got He had to now pull more of the housework and cleaning but he is getting there.. Last Friday he and dd1 (age almost 18) came to my work (shop) to ask me " whats for dinner?" I replied. "Well I am eating here. I have NO idea what you lot are having" They made spag bol... Saturday I was not asked what was for dinner (working late both days) they worked it out.
However it would have been very easy for me to say " there is frozen spag bol in the freezer or - I put something in the slow cooker" However I do not do anyone any favours if I allow them to expect that to be my responsibility. Not dh not the dd's and not ds.. they ALL need to see that we are a " we as a family" not just mum and them...
Don't allow your dh to opt out of being part of the family.
Personally I do not think this means he has to stop going to his hobby if you are ok with him going every weekend (Some would be ok with that work that out for yourself) what is not ok is him not engaging and taking full part.
You can literally train him to act different.. he has just got into bad habits..
I know many will say "why should op have to do that?" Well she doesn't have to. However part of the reason why the dh behaves as he does.. is he is allowed. So the simple answer is stop allowing it.