Help ID'ing a Vintage Apoctolyptic Film

Ok, I really doubt anyone's going to get this one since I don't remember many details, but I guess its worth a shot.

I think the movie took place in the 60's or 70's. Two families live in a middle class type neighborhood and have a bomb shelter in the yard, between their houses. One of the wives can't mentally take it and has to be sedated. They were well stocked, but I remember at one point there was an argument about ketchup. I want to say it might have been a Spanish film, but I'm not sure. Definitely didn't have the highest budget, but was well made.

I know, thats not a lot to go on, but maybe it will jog someones memory.

Oh, and movie was on VHS. I found it in a record store and I remember my friend and I started cracking up because the original price tag was like $50. I still can't believe movies were than expensive back in the day.

UPDATE:
Holy shit I can't believe I found it. I though I had thrown away all my VHS tapes. Its called "Refuge of Fear" and was indeed a Spanish movie.

https://www.amazon.com/Refuge-Fear-Craig-Hill/dp/B00097E74O
http://www.imdb.com/title/tt0072071/