Three-Season Rooms
A full window enclosure stretches your porch season from March into November without the cost of a year-round addition. We handle the structural conversion and the glass.
What's included
Sliding or four-track storm window walls let you close up the space in cold months and open it fully in summer.
The lower wall section below the windows is framed and insulated to cut down on drafts and hold heat from portable heaters.
We rough in and finish electrical circuits sized for space heaters, lighting, and outlets you'll actually use out there.
A proper weather-sealed threshold ties the new room into your home so the transition doesn't leak air or water.
Framing is reinforced where needed to carry the added weight and wind load of a full glass wall system.
We address floor insulation and finish so the room isn't uncomfortably cold underfoot in shoulder-season months.
Materials
Four-track storm windows cost less and let you fully open the room in summer, while fixed insulated glass holds heat better in shoulder months.
From first call to done right.
Consult on goals and season use
We talk through when you actually want to use the room, which shapes the window and heating choices we recommend.
Design and engineering
We finalize the window wall layout and confirm the existing structure can support the conversion, upgrading it where needed.
Structural conversion
Framing, knee walls, and any reinforcement go in first to prepare the shell for glass.
Windows, electrical, and finish
Window systems are installed, electrical is finished, and flooring and trim are completed to a move-in-ready state.
"We were still using it for coffee in October with the four-track windows cracked open, which never would have happened with the old screened porch."
K. Alberti · Pittsford
Three-Season Rooms FAQs
Can a three-season room be heated for year-round use?
It can be extended toward that with better insulation and a permanent heat source, but a true three-season room isn't built to the same insulation standard as a year-round addition, so we'll be upfront if that's really what you want.
How is this different from a sunroom?
The terms overlap, but we generally use 'three-season room' for a converted porch enclosure with operable windows, while a full sunroom is closer to a year-round addition with permanent insulated glazing.
Do I need a permit for this conversion?
Yes, converting an open or screened porch to an enclosed room typically requires a permit since it changes the structure and sometimes the electrical load.
Will the room stay warm on a chilly spring evening?
With insulated knee walls, a good window system, and a portable or electric heater, most customers find it comfortable well into fall and starting again in early spring.
More porches services
Start with a free estimate.
On-site visit, written quote, usually within 48 hours.