Quote:
Originally Posted by JRcorvette
You definitely should insulate the ceiling and it may be required. Double pane glass does not help all that much. Better to spend the money on some sun screen shades to use when needed. I would suggest try leaving the doors open during the daytime and close when you go to bed (mostly for security). See how your energy bill changes. An extra 300sf is not that much. The cost of adding a mini split AC is between $6000 & $7500. Do the math that will cover many years of a slightly higher AC bill.
|
Disagree with your statement that double pane glass does not help that much. Agree that shades should be added. The shades can minimize the direct sun radiant heat. Single layer of glass windows will act like a heater during the summer and a cooler during colder weather.
Doing it cheap is a choice that you would likely regret. Our 300 sq ft addition was done with insulation, Double pane windows, shades, and Mini split. It is our main living area year-round. No restrictions. The room is efficient all year round with no need to think about lanai doors open or closed.