Live in older modular home (in Colorado). There appears not to be any type of roof vents (side, soffit or ridge). Condensation forming in attic and entering living space. Would assume that all attics should have some sort of venting to stop condensation forming from heat loss into attic. Please advise.

 

It is hard to believe that a manufacturer of homes would build a house without attic ventilation, but to be honest, I have seen stranger things in my life.

Attic ventilation is necessary especially in cold climates to by pass the low vapor permability of roofing shingles and/or materials. The rule here is 1 square foot of free venting for every 300 square feet of attic floor area if a vapor barrier is applied to insulation. If vapor barrier is not applied to insulation the rule is 1 square foot of free venting for every 150 square feet of attic floor area.

http://www.bpa.gov/Energy/N/energy_t...porbarrier.cfm

This site gives you basically the same information, along with some illustrations.