What a three season room is — and isn't
A three season room is a screened porch with window panels where the screens would be. The panels slide or stack open, so on a good day it's a porch; closed, it blocks wind and rain, holds the sun's warmth on a cool afternoon, and keeps the pollen out in April — which, in Northern Virginia, is reason enough on its own.
What it isn't is a heated addition. The panels are single-pane vinyl or glass, the walls aren't insulated, and the room isn't tied into the house's heating and cooling. A space heater takes the edge off a cool evening, but this is not a room you heat in January. The name means what it says.
The step beyond this is a sunroom — an insulated, conditioned addition on a foundation. That's a different kind of project with a different permit and a different budget, and it's worth knowing which one you're actually asking for before the first visit.
- New three season rooms on a deck or at grade
- Converting an existing screened porch with window panels
- Rooms built with a new deck or patio as one project
- Screened porches framed now for panels later