We’ve talked about mould in your attic, and one source of water for its growth can be frost or what is sometime referred to as hoar frost. If you have frost in your attic, take note.
This occurs when there high humidity / moisture levels in the attic freeze (e.g. from roof leaks, ice dams, plumbing) or condensation forms from warm moist air meeting cold attic surfaces that turn to frost (e.g. from heat loss from the home, made worse with poor attic insulation and ventilation).
Attic frost is not a good thing. Just think…as the ice / frost thaws and refreezes what damage will it cause to building materials. Then, when it eventually melts in the spring, where will all that water go and what damage will it cause…aside from its ability to grow mould. It’s important to make efforts to decrease the chances of frost from occurring in the first place. This frost build up can be made worse with insufficient insulation, poor ventilation and or no vapour barriers, or vapour barriers with are not sealed. This allows heat loss from the home. Sometimes, kitchen and bathroom exhaust fans aren’t vented to the exterior of the home.
Unsure what’s going on in your attic? Get it inspected!