
Your entire home should be a retreat that’s warm and toasty in the winter and cool and comfortable in the summer. However, owners of some two-story homes find the upper floor is stubbornly hotter or colder than the main floor.
This could simply be due to the fact most thermostats in a house are on the ground floor, which is where people spend the most time—in the living room, kitchen, etc.—so they set the temperature according to how it feels on the first floor.
However, temperature differences between the upstairs and downstairs could also be because of problems with your HVAC system. Some of these issues can be resolved fairly quickly while others might call for more extensive and costly fixes. Here, the professionals at Superior Air Repair will help you determine why the upstairs of your home is hotter than downstairs, or vice versa.
Why Is My Upstairs So Hot?
The phenomenon of the upstairs of a two-story home becoming hotter than the downstairs can be traced to several factors. For starters, heat rises, so it’s natural for the second floor of a home to get hotter than the ground floor. Poor insulation in the attic or roof can exacerbate this issue by letting heat transfer from the roof into the upstairs rooms.
Another common reason is that the air conditioning is not strong enough to cool the entire home, causing it to struggle to cool the upstairs properly.
To deal with these issues, homeowners could add additional insulation in the attic and make sure their home has sufficient ventilation. If there’s a possibility the air conditioner is the ideal size for the home, call an experienced HVAC company like Superior Air Repair inspect the unit. A skilled professional also can help locate a unit that's better suited for your home if you need air conditioning installation or replacement.
Why Is My Upstairs Always Cold/Not Heating?
When the downstairs of your home is warm, but it’s very cold upstairs, that makes for a very chilly night for anyone whose bedrooms are on the upper floor. The most prevalent reasons an upstairs not heating like it ought to are the insulation levels and the ductwork.
Inadequate insulation permits cold air to filter through the home’s attic or walls and contribute to heat loss, causing colder temperatures on the upper levels. It’s essential to make sure your home has a deep, level layer of insulation in the attic and appropriate insulation in the walls to keep the cold out and the heat inside.
The ductwork in a home plays a very important role in circulating conditioned air throughout different locations of the building. However, problems with the ductwork can result in the upstairs being colder than the main level. A common explanation for this is improper airflow balance. The ducts may not be the proper size or design, resulting in an uneven distribution of air between the floors. This can cause more warm air to be directed to the downstairs, which creates insufficient airflow—which is the heated air—on the higher floors.
Another potential problem area in the ductwork is the placement of the supply and return vents. If there are fewer vents on the upper level or they are not correctly placed, it can restrict air circulation and cause inferior heating or cooling. In addition, leaks or gaps in the ductwork can lead to air loss, decreasing the overall efficiency of the HVAC system and actually making the temperature difference worse.
To understand why the upstairs is colder than the downstairs, homeowners should hve their ductwork inspected by trusted HVAC pros like the team at Superior Air Repair to identify any imbalances, leaks or inadequacies. Sealing leaks and putting in more vents or adjusting existing ones can help increase airflow and ensure a better temperature balance between the upstairs and downstairs.
What Do I Do to Fix a Hot/Cold Upstairs?
If your upstairs is hotter or colder than the rest of your house, an HVAC zoning system could be a highly effective solution.
An HVAC zoning system breaks the residence into different zones, which each have their own thermostat and damper system so the homeowner can control the heating or cooling of each zone.
This system can be very effective in instances where the upstairs of a multi-story home is too hot or extremely cold while the main floor is comfortable. By investing in a zoning system, homeowners can manage the temperature independently in each zone, making it possible for them to address specific hot or cold spots effectively.
To discover more about an HVAC zoning system in Bryan, call Superior Air Repair. We’ve designed and installed customized home comfort plans for many community members and are happy to show how an HVAC zoning system could work in your home.
Why Is it So Humid Upstairs?
In addition to the upper story being hotter or colder than the rest of the house, another issue in multi-floor homes is when the higher levels are more humid than the first floor.
A frequent explanation for excess upper floor humidity is weak ventilation on the upper floor, which can produce greater humidity levels. As is often the case with temperature differences between floors, insufficient insulation or sealing in the attic or walls may permit warm, humid air from outdoors infiltrate the upstairs rooms. In addition, if there are any leaks or plumbing concerns on the upper floor, that can also cause extra moisture in that section of a home.
To correct humidity problems, homeowners can improve ventilation by using fans or opening windows to promote airflow. Proper insulation in the attic and better sealing the attic and walls can help protect against external moisture from entering the upstairs. Identifying and repairing any leaks or plumbing issues is also imperative.
Depending on the levels of moisture found in the home, a whole-home dehumidifier could be another helpful tool to control humidity in your home.

