Improving insulation in carport converted to TV room with tongue&groove ceiling

Hey guys,

We've got a 1970s ~1500sq/ft rancher where the carport was previously converted into a TV room and bathroom. The TV room still has the original tongue and groove cedar ceiling with sloppy/minimal ceiling insulation. TV room is East side of house in full sun, and we live in Vancouver BC area (Near US ZIP 98230). TV room is hot in summer, cold in winter. Eg With the A/C on in the midst of a heat wave TV room is 28°C (82°F) and room beside it (with drywall ceiling and 1layer of insulation) is 24°C (75°F) with outside temp of 37°C(99°F). I suspect the TV room could use another HVAC vent in it, but that will have to wait until we redo the floor.

Am I right in guessing blown in insulation over the TV room is best? We would likely do the rest of the house at the same time. I assume the tongue/groove ceiling has a ton of air leakage so what should be done about that? Keeping in mind that it's a 42yo house with no vapour barrier in a humid area so airflow is required to keep mold away.

We spend enough time in this room and hope to be here for decades so will spend money to be more comfortable and/or save money down the road.

Thanks for any input!
Cory

 

You don't induce air flow to cure mold, they are not related.

In fact you want to eliminate air flow from a conditioned space to the attic, it has it's own unconditioned air flow, all your doing is throwing money and efficiency out the window.

So the ceiling is just the cedar planking?