Can spray foam insulation seal my house too tight?
In the past, engineers designed homes to breathe and there was ventilation provided through the attic; the formula for building envelopes has since evolved. Your house DOES need to be ventilated, however, most home engineers and building scientists advise that you seal the structure as tight as possible and provide necessary ventilation through your air conditioning and heating system. Many systems employ an “air exchanger” which pre-conditions incoming outside air to control humidity and energy efficiency. This type of design along with spray foam creates a true Thermal Envelope.
