Solved: Upstairs Is Hotter or Colder Than Downstairs

Every floor in your home should be a sanctuary that’s warm and toasty in the cold months and cool and comfortable in the summer. However, families who live in some multi-level residences 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 first floor, which is where people spend the greatest amount of time—in the living room, kitchen, etc.—so they set the temperature according to how it feels on the first floor.

However, temperature discrepancies between the upstairs and downstairs could also be because of problems with your HVAC system. Some of these challenges can be sorted out fairly quickly while others might require more extensive and costly fixes. Here, the professionals at ACE Solutions 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 getting hotter than the downstairs can be attributed to several factors. For starters, heat rises, so it’s natural for the second floor of a home to get hotter than the main floor. Insufficient insulation in the attic or roof can make this worse by permitting heat transfer from the roof into the upstairs rooms.

Another common reason is that the HVAC system is not strong enough to cool the entire home, causing it to have difficulty cooling the upstairs sufficiently.

To fix these issues, homeowners could add additional insulation in the attic and make sure their home has adequate ventilation. If there’s a possibility the air conditioning unit is the correct size for the home, call an experienced HVAC company like ACE Solutions inspect the unit. A knowledgeable professional also can help select a unit that's better suited for your home if you are considering air conditioning installation or replacement.

Why Is My Upstairs Always Cold/Not Heating?

When the downstairs of your home is warm, but it’s freezing upstairs, that makes for a frosty night for anyone whose bedrooms are on the upper floor. The most prevalent reasons an upstairs not heating like it should are the insulation levels and the ductwork.

Inadequate insulation enables cold air to seep through the home’s attic or walls and contribute to heat loss, creating colder temperatures on higher floors. It’s essential to make sure your home has a deep, level layer of insulation in the attic and adequate insulation in the walls to keep the cold out and the heat inside.

The ductwork in a home plays a very important role in disseminating conditioned air throughout different rooms of the building. However, issues with the ductwork can cause the upstairs being colder than the downstairs. A common cause for this is improper airflow balance. The ducts may not be the right size or configuration, which results in an uneven distribution of air between the floors. This can cause more warm air to flow downstairs, causing insufficient airflow—which is the heated air—on the upper story.

Another factor with ductwork is the placement of the supply and return vents. If there are fewer vents on the upper floor or they are poorly placed, it can limit air circulation and cause inferior heating or cooling. In addition, leaks or gaps in the ductwork can cause air loss, reducing the overall efficiency of the HVAC system and actually making the temperature difference worse.

To find out why the upstairs is colder than the downstairs, homeowners should hve their ductwork examined by experienced experts like the team at ACE Solutions to identify any imbalances, leaks or inadequacies. Sealing leaks and installing more vents or adjusting existing ones can help increase airflow and ensure a more consistent temperature balance between the upstairs and downstairs.

Fixing the Hot or Cold Upstairs Problem?

If your upstairs is hotter or colder than the rest of your residence, an HVAC zoning system could be a great 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 particularly helpful in scenarios where the upstairs of a multi-story home is very hot or really cold while the main floor is comfortable. By implementing a  zoning system, homeowners can control the temperature independently in each zone, enabling them to address specific hot or cold spots effortlessly.

To learn more about an HVAC zoning system in Hasbrouck Heights, call ACE Solutions. We’ve developed and installed customized home comfort plans for many community members and are happy to show how an HVAC zoning system could benefit your home.

Why Is the Humidity So High Upstairs?

In addition to the upper story being hotter or colder than the rest of the house, another challenge in multi-floor homes is when the upper floors are more humid than the first floor.

A typical reason for excess upper floor humidity is poor ventilation on the upper floor, which can produce increased humidity levels. As is often the case with temperature differences between floors, inadequate insulation or sealing in the attic or walls may let warm, humid air from outside infiltrate the upstairs rooms. Plus, if there are any leaks or plumbing issues on the upper floor, that can also create extra moisture in that area of a home.

To correct humidity problems, homeowners can increase ventilation by getting fans or opening windows to promote airflow. Appropriate levels of insulation  in the attic and better sealing the attic and walls can help stop external moisture from entering the upstairs. Locating and repairing any leaks or plumbing issues is also critical.

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.