Sunroom Bedroom Addition
Thinking About Adding a Sunroom? Here's Everything You Need to Know First
A glass- or screen-enclosed space connects you with the outdoors. Here's how to decide which seasonal room features suit your house best.
Filled with sunlight and cozy patio furniture, sunrooms are the ideal spot to unwind with a beverage and a good book. These transitional spaces connect your home with the outdoors while protecting you from the elements, allowing you to enjoy the best of indoor and outdoor living at the same time. If you're thinking about adding a sunroom to your home, it's important to know all your options. Between the different types of seasonal rooms, materials choices, and budget concerns, there's a lot to consider. Use this guide as a resource for everything you need to know before adding a sunroom.
Types of Sunrooms
Seasonal rooms come in many forms. Here are the basic types of sunrooms.
table with flowers by hanging chair on porch
Credit: Karin Lidbeck Brent
Sunroom: This type of room (also called a solarium or conservatory) is a glassed-in living space typically attached to the house and accessible from indoors. It is designed to function as an additional living area during mild weather. Because sunrooms typically aren't hooked up to your home's heating or cooling system, they may not be comfortable in harsh summers or winters.
Porch with striped rug, two couches, and wooden table
Four-season room: Closely related to the sunroom, this option is designed to be heated and cooled. As a result, it can be enjoyed year-round.
Porch with dining area, striped rug
Attached greenhouse: Featuring the same basic structure and shell construction as a sunroom or four-season room, an attached greenhouse structure offers light, temperature, and humidity levels that are designed for plants.
Porch with striped rug, couch, two tables and chairs
Screen room or porch: This option has mesh-screen windows or walls rather than glass, which offers the advantage of fresh air without insects. Like the sunroom, it is habitable only when the weather is agreeable. Because the materials are relatively inexpensive, this can offer a budget-friendly sunroom option.
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Where to Place Your Sunroom
Deciding on the best location for your sunroom is the first critical step when planning a glass or screen addition. Consider the typical weather where you live and the direction the sunroom windows will face. In northern climates, an area with southern exposure is best because it will receive the most light each day. In the South, however, a southern exposure means additional cooling will be necessary, which could be costly.
An eastern exposure will ease cooling needs by providing sun in the morning and shade the rest of the day, while a western orientation could expose you to harsh afternoon sun that will need to be shaded.
A northern exposure will provide lower levels of light and partial shade most of the day. In the North, this can cause the room to be too cool and damp, but it can work fine in the South, where it may eliminate the need for window treatments or additional cooling.
Types of Sunroom Materials
Understanding the components that go into a seasonal room will help you select the type of space you want.
Vinyl is the most popular material used for the supports of a sunroom. It costs the least, requires minimal upkeep, and offers the best in overall strength and insulation. It is available mainly in white. Most vinyl supports are "multiwalled," meaning they have an internal reinforcement of either aluminum or galvanized steel.
Aluminum is not as good an insulator as vinyl and is also usually more expensive. However, many rooms that use vinyl-coated vertical supports for aesthetics or added insulation have aluminum as the roof structure for added strength.
Wood is the most expensive choice of structural sunroom material, but it is also a more appropriate choice for screen rooms, easily allowing you to attach the screen mesh to the timbers. (A screen room needs an extension of the existing roof over the room.) Note that wood requires periodic maintenance.
Porch with swing seating and pillows
Sunroom Roof and Wall Ideas
Sunrooms, four-season rooms, and greenhouses are walled with glass and roofed with glass or polycarbonate (a tough, transparent thermoplastic). A glass roof is quite a bit more expensive but provides the most clarity. Look for the U-value of the glass or polycarbonate; this is a measure of how much heat the material conducts. The lower the number, the less heat passes through, so choose the lowest possible U value for the most energy-efficient space.
Glass walls should be silicone double-sealed, A-rated, and labeled "tempered safety" to meet building code requirements. The best choices are as follows:
- Double-glazed glass. This material offers durability, insulation, and glare reduction. A typical U-value ranges from 2 to 2.5. Common glazings, in order of most to least efficient, include clear, solar bronze, and opal.
- Double-glazed glass with low-emissivity coating. Applying a "low-E" coating helps the glass reflect heat and ultraviolet rays. The coating reduces the U-value to around 1.7, thus improving energy efficiency.
- Double-glazed glass with argon filling and low-E coating. Argon (an inert gas) can be added to further reduce the U-value to about 1.48.
For polycarbonate components, look for these options:
- 6-millimeter twin-wall polycarbonate. Probably the most popular glazing option in conservatory roofs today, this material features a U-value of 2.3.
- 20-millimeter and 25-millimeter twin-wall polycarbonate. For a stronger roof that also insulates better, these thicknesses are good choices to create a true "room for all seasons." The typical U-value is 1.6.
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Sunroom Heating and Cooling Ideas
If you can't place your sunroom in the optimum location to control excessive heat loss or gain, or you simply want to extend the hours you can comfortably inhabit your all-season room, consider these options:
- Add operative skylights to act as heat dumps when the room gets too warm.
- Intersperse prefabricated insulating roof panels among the glass roof panels. Look for R-factors of R-16, R-24, or R-32 (the higher the number, the better the insulation quality).
- Construct walls so that several windows open. Choose those that will work together to allow optimum air flow.
- Install ceiling fans to aid air circulation. Choose models with forward and reverse speeds for summer or winter use.
- Install exterior roof shade tracks that hold rigid exterior sunscreens.
- Choose window treatments that can be raised and lowered completely along the most troublesome wall areas.
- Install a small gas wall heater in the space you will use most often during the colder months. For a more luxuriant touch, install radiant floor heating.
farmhouse living room unpainted wood many windows
Credit: Kritsada Panichgul
Average Sunroom Costs
- Sunrooms of wood and standard materials start at $15,000. Top-of-the-line aluminum and glass sunrooms topping out at $22,000. Of course, prices will vary by design, materials, your region, and the amount of work you'll do yourself.
- Construction costs of four-season rooms will vary, too, according to heating and cooling demands and finish details. Expect to pay at least $20,000 for a finished room.
- Screened porches are a comfortable option for a far lower price tag. You can get the results you want for $5,000 to $10,000.
Source: https://www.bhg.com/home-improvement/porch/sun-room/what-to-know-before-adding-a-sunroom/
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