I purchased a 55 year old home that has no soffit vents. The attic space consists of a knee wall attic space and peak attic space. The peak attic space has vents at each end and a ridge vent at the top. I checked for signs of moisture and mold and found none. I live in the Fort Worth, Texas area. I always hear Mike Holmes talk about the necessity of soffit vents, but I know his show is in Canada which is a very different climate from mine. It seems to me that if the house was OK for 55 years without soffits, then I don't need to do anything and that it's OK.
What do you guys think?