A dirt crawl space is particularly challenging to keep warm, as the earth naturally cools the air inside.

By keeping your crawl space at a consistent temperature, you can prevent the loss of heat from your living spaces and reduce your energy bills.

In addition, a crawl space heater can help to eliminate moisture and condensation, which can lead to mold growth and other moisture-related issues.

By installing a crawl space heater, you can also improve the overall comfort of your home.

With a warmer crawl space, your floors will be more comfortable to walk on, and your living spaces will feel cozier.

This can be especially important during the colder months when chilly floors and drafty rooms can make your home feel uncomfortable.

Another benefit of installing a crawl space heater is improved indoor air quality. By reducing moisture levels and preventing the growth of mold and other allergens, you can create a healthier living environment for you and your family.

Why Crawl Space Heating Is Important?

A crawl space that is not properly insulated or heated can cause several issues for homeowners.

First and foremost, it can lead to cold and uncomfortable floors in the living space above the crawl space.

This can be particularly challenging during the winter months when the temperature drops significantly.

Additionally, a cold crawl space can also lead to increased energy bills, as your heating system works harder to keep your home warm.

Finally, a damp and cold crawl space can also lead to the growth of mold and mildew, which can negatively impact indoor air quality and pose health risks.

Common Issues With Crawl Spaces

Crawl spaces are prone to several issues that can make them challenging to heat. One of the biggest challenges is the presence of moisture, which can lead to the growth of mold and mildew.

Additionally, a dirt crawl space is naturally cool, and this can make it difficult to keep the air inside warm.

Crawl spaces are often poorly ventilated, which can lead to the buildup of stagnant air and unpleasant odors

Insulating Your Crawl Space

Insulation can help to prevent heat loss and reduce the amount of energy needed to heat your home.

Here are some key points to consider when insulating your crawl space:

Benefits Of Crawl Space Insulation

Insulating your crawl space can bring a number of benefits. For one, it can help to prevent heat loss through the floor and foundation walls.

This means your home will stay warmer and you’ll save money on heating costs.

Additionally, insulation can help to prevent moisture buildup in the crawl space, which can lead to mold growth and structural damage over time.

Types Of Insulation Materials

There are a few different types of insulation materials you can use in your crawl space, including fiberglass batts, spray foam, and rigid foam board.

Fiberglass batts are a popular choice due to their affordability, but they can be difficult to install properly.

Spray foam and rigid foam board insulation, on the other hand, are more expensive but can provide better insulation and moisture resistance.

How To Properly Insulate The Floor And Foundation Walls?

When insulating your crawl space, it’s important to properly insulate both the floor and foundation walls.

A gap on the foundation wall opening to crawl space

For the floor, you can install insulation batts between the floor joists or use spray foam insulation to create an air seal.

For the foundation walls, you can use rigid foam board insulation to create a continuous layer of insulation around the perimeter of the crawl space.

Cost considerations

The cost of insulating your crawl space will depend on a number of factors, including the size of your crawl space, the type of insulation material used, and whether you choose to hire a professional contractor.

While insulating your crawl space can be a significant investment upfront, the long-term energy savings and improved comfort can make it well worth the cost.

Preventing Freezing in Your Crawl Space

To prevent freezing pipes, it’s important to keep your crawl space warm and well-insulated.

This can be achieved by using a crawl space heater and insulating the walls and subfloor. It’s also important to seal any air leaks to prevent cold air from entering the space.

Additionally, you can install pipe insulation to keep your pipes from freezing.

This is a relatively inexpensive solution that can save you a lot of money in the long run.

Finally, it’s a good idea to keep a small space heater or heat tape on hand in case of extreme cold

It was a cold winter day in January, and our team of HVAC technicians had just received a call from a homeowner in a rural area of Pennsylvania. The homeowner had been experiencing uncomfortably cold floors in their living room, and upon inspection, we discovered that the crawl space underneath the house was not properly insulated or heated.

After discussing the options with the homeowner, we recommended insulating the crawl space and installing a crawl space heater. We explained the benefits of each option, including the increased energy efficiency and comfort that the homeowner would experience.

We got to work sealing the crawl space vents and air leaks to prevent cold air from entering. Then, we installed batt insulation on the crawl space walls and spray foam insulation on the sub-floor. Finally, we installed a gas-powered crawl space heater to provide consistent and efficient heat to the space.

The results were impressive. The homeowner reported that their living room floors were now warm and comfortable, and they noticed a significant decrease in their energy bills. Our team was proud to have provided a solution that not only improved the homeowner’s quality of life but also saved them money in the long run.

Using Radiant Floor Heating to Warm Your Crawl Space

Radiant floor heating is a type of heating system that uses electrical cables or water pipes to warm up the floor of a building, which in turn radiates heat upwards and warms the entire space.

It is a popular choice for homeowners who want an efficient and comfortable heating system for their homes.

When it comes to crawl spaces, radiant floor heating is a great option for providing warmth from the bottom up, helping to keep the floors warm and comfortable to walk on.

Types of Radiant Floor Heating Systems for Crawl Spaces

There are two main types of radiant floor heating systems: electric and hydronic. Electric systems use electrical cables or mats that are installed directly under the floor, while hydronic systems use water pipes that are installed under the floor.

Electric systems are typically easier and less expensive to install, making them a popular choice for smaller crawl spaces.

Hydronic systems, on the other hand, are more complex and expensive to install, but can be more efficient and cost-effective for larger crawl spaces.

 Pros and Cons of Radiant Floor Heating for Crawl Spaces


  • Radiant floor heating is energy efficient, as it heats the space from the bottom up and reduces heat loss through the walls and ceilings.
  • It provides consistent and even heat throughout the space, eliminating cold spots and drafts.
  • It does not produce any noise, dust, or allergens, making it a great option for those with allergies or respiratory issues.
  • Radiant floor heating can increase the resale value of a home.
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  • The initial installation cost can be higher compared to other heating systems, especially for hydronic systems.
  • It can take longer to heat up a space compared to forced air heating systems.
  • Repairs can be difficult and expensive if there is a problem with the system.
  • The floor height may need to be raised to accommodate the heating system, which can be a problem in crawl spaces with limited vertical space.

Despite its higher initial cost, radiant floor heating is a great investment for homeowners who want a comfortable and energy-efficient heating system for their crawl spaces.

When properly installed and maintained, it can provide years of reliable warmth and comfort.

Removing Crawl Space Insulation: Is it Necessary?

Insulating your crawl space can have many benefits, but there may be times when it becomes necessary to remove the insulation.

When And Why To Remove Insulation

There are several reasons why you might need to remove insulation from your crawl space.

One common reason is if the insulation has become wet or damp, which can cause it to lose its effectiveness and potentially lead to mold growth.

Additionally, if you are experiencing issues with pests or rodents in your crawl space, removing the insulation may be necessary to address the problem.

Another reason to remove insulation is if it was installed incorrectly or is no longer effective due to age or wear and tear.

In some cases, removing the insulation may be necessary to properly address air leaks or moisture issues in the crawl space.

Risks And Benefits Of Insulation Removal

While removing insulation from your crawl space may seem like a straightforward task, it can come with both risks and benefits.

One potential risk of insulation removal is the release of dust, debris, and other contaminants into the air, which can be harmful if inhaled.

Additionally, removing insulation can be a time-consuming and labor-intensive process.

On the other hand, there are also potential benefits to insulation removal. By removing damaged or ineffective insulation, you can improve the air quality in your home and prevent potential health hazards from mold growth or pest infestations.

Removing insulation can also provide an opportunity to properly address any underlying issues in the crawl space, such as air leaks or moisture problems.

Ultimately, the decision to remove insulation from your crawl space will depend on your specific situation and needs.

If you are experiencing issues with moisture, pests, or air leaks, it may be necessary to remove the insulation in order to properly address the problem.

However, if your insulation is in good condition and effectively keeping your crawl space warm and dry, there may be no need to remove it.

Sealing Air Leaks in Your Crawl Space

Crawl spaces often have several air leaks that allow outside air to infiltrate, making your home less energy efficient and more prone to moisture problems.

Air sealing helps to keep your crawl space insulated and prevent energy loss, which can save you money on your energy bills and improve your indoor air quality.

Here are some tips to prevent cold air from entering your crawl space:

Common Air Leaks In Crawl Spaces

Some common areas where air leaks occur in crawl spaces include the gaps between the subfloor and the foundation, openings around pipes and ductwork, and gaps around electrical outlets and switches.

Additionally, vented crawl spaces can also let in outdoor air, which can further exacerbate the issue.

How To Air Seal The Sub-floor

To properly air seal your crawl space sub-floor, start by identifying the areas that need attention.

Use caulk to seal gaps and cracks around pipes and ductwork, and foam sealant to fill larger gaps between the sub-floor and foundation.

You can also use weatherstripping to seal openings around electrical outlets and switches.

Another common source of cold air infiltration in crawl spaces is air leaks. These can occur around pipes, electrical wires, and other openings in the crawl space walls and floors.

To seal these leaks, you can use caulk, spray foam insulation, or weatherstripping.

Other Tips For Preventing Cold Air Infiltration

In addition to sealing crawl space vents and air leaks, there are other steps you can take to prevent cold air from entering your crawl space. These include:

  • Installing a vapor barrier: A vapor barrier can help to prevent moisture from entering your crawl space, which can lead to cold air infiltration.
  • Insulating your crawl space walls and floors: Insulating your crawl space walls and floors can help to prevent cold air from entering your home.
  • Sealing your ductwork: If your crawl space contains ductwork, make sure to seal any leaks to prevent cold air from entering.
  • Keeping your crawl space door closed: Make sure to keep your crawl space door closed to prevent cold air from entering your home.

Insulating Your Crawl Space Sub-floor with Spray Foam

Crawl spaces often have dirt floors and lack proper insulation, which can cause cold floors and uncomfortable living spaces.

To ensure that your crawl space is adequately insulated, there are a variety of methods available, including using spray foam insulation.

Spray foam insulation is an excellent option for insulating crawl space sub-floors due to its insulating properties and ability to seal air leaks.

The foam is sprayed directly onto the sub-floor and expands to fill any gaps, creating an airtight seal.

This process prevents air from escaping through the floor and keeps the crawl space warm and dry.

Using spray foam insulation in your crawl space also offers other benefits, such as reducing your energy bills and improving indoor air quality.

The airtight seal created by spray foam insulation prevents outside air from entering your home, which in turn reduces the amount of energy needed to heat your home.

Additionally, the foam can help prevent the growth of mold and mildew in your crawl space by keeping moisture out.

Installing spray foam insulation in your crawl space sub-floor is relatively straightforward, and it can be done by a professional or as a DIY project.

However, it is essential to follow the manufacturer’s instructions carefully to ensure proper installation.

The cost of installing spray foam insulation in your crawl space can vary based on the size of the area to be insulated, the thickness of the foam, and the installation method.

However, the long-term savings on your energy bills make the investment in spray foam insulation well worth it.

Additionally, many utility companies offer rebates for homeowners who install energy-efficient insulation in their homes.

Preparing Your Crawl Space for Heater Installation

If you’ve decided to install a heater in your crawl space, it’s important to properly prepare the space to ensure optimal performance and safety.

Here are some steps to follow when preparing your crawl space for heater installation.

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How To Evaluate Your Crawl Space For Heater Installation?

The first step in preparing your crawl space for heater installation is to evaluate the space to determine the best type and size of heater for your needs.

Consider factors such as the size of the space, the level of insulation, and any existing heating or cooling systems.

It’s also important to evaluate any potential safety hazards, such as the presence of flammable materials or electrical wiring, and to ensure proper ventilation and air flow.

Steps To Prepare Your Crawl Space For Installation

Once you’ve evaluated the space and selected a heater that meets your needs, it’s time to prepare the crawl space for installation.

Here are some important steps to follow:

  1. Clean and clear the area: Remove any debris or obstacles from the crawl space to create a clear work area. This will make it easier to install the heater and ensure that it operates safely and efficiently.
  2. Seal air leaks: Before installing the heater, it’s important to seal any air leaks in the crawl space to prevent warm air from escaping and cold air from entering. This can be done using caulking, weatherstripping, or foam sealant.
  3. Install insulation: Insulating your crawl space can help to prevent heat loss and improve the efficiency of your heating system. Consider installing insulation in the walls, floor, and ceiling of the crawl space.
  4. Install the heater: Once the crawl space is properly prepared, it’s time to install the heater. Follow the manufacturer’s instructions carefully and make sure that the heater is installed safely and securely.

Comparing Electric and Gas Crawl Space Heaters

When it comes to crawl space heating, there are two main types of heaters to consider: electric and gas.

Both have their advantages and disadvantages, and it’s important to weigh them carefully to determine which one is right for your home.

Electric Crawl Space HeatersGas Crawl Space Heaters
Initial CostGenerally less expensiveGenerally more expensive
Fuel SourceElectricityNatural gas or propane
Energy EfficiencyHighVariable depending on efficiency rating and maintenance
SafetyNo carbon monoxide emissionsPotential carbon monoxide emissions if not properly maintained or vented
Installation and MaintenanceEasy installation and low maintenanceProfessional installation and regular maintenance required
AvailabilityWidely availableMay not be available in all areas
Heating CapacityTypically lowerTypically higher
Operating CostHigher electricity costLower cost of natural gas or propane
Environmental ImpactMay be less environmentally friendly due to electricity generationMay be more environmentally friendly if natural gas is a cleaner fuel source in your area

Electric heaters are powered by electricity and can be installed easily without the need for a gas line. They are typically smaller in size and can be more affordable to purchase and install. On the downside, electric heaters may be more expensive to operate in the long run due to the cost of electricity.

Gas heaters, on the other hand, are powered by natural gas or propane and can be more powerful and efficient than electric heaters.

They can also be more cost-effective to operate in areas with lower electricity rates. However, gas heaters require a gas line to be installed, which can be expensive and time-consuming.

They may also produce emissions and require regular maintenance.

Electric crawl space heaters have several advantages, including:

  • Easy installation: Electric heaters are easy to install, and you don’t need to have a gas line installed.
  • Low upfront cost: Electric heaters are generally less expensive to purchase and install than gas heaters.
  • Compact size: Electric heaters tend to be smaller in size, making them easier to fit into tight spaces.

However, there are also some disadvantages to consider when it comes to electric crawl space heaters:

Gas crawl space heaters also have their advantages and disadvantages, including:

Tips to Reduce Heating Costs in Your Crawl Space

If you’re looking to save money on heating costs in your crawl space, there are several things you can do to improve energy efficiency. Here are some tips:

How To Reduce Energy Costs In Your Crawl Space

  1. Seal air leaks: One of the easiest and most effective ways to reduce heating costs in your crawl space is to seal any air leaks. Look for gaps and holes around pipes, vents, and other penetrations in the crawl space walls and floors. Use caulk, foam insulation, or weatherstripping to seal them up.
  2. Insulate your crawl space: Insulating your crawl space can help keep the heat inside, reducing the amount of energy needed to keep it warm. There are several different types of insulation materials available, including fiberglass, spray foam, and rigid foam. Consult with a professional to determine which type of insulation is best suited for your crawl space.
  3. Install a vapor barrier: Moisture can seep into your crawl space from the ground, making it harder to heat and potentially causing damage. Installing a vapor barrier can help prevent this by blocking moisture from entering the space. A vapor barrier is a layer of plastic or other material that is installed on the crawl space floor.
  4. Use a programmable thermostat: A programmable thermostat can help you save money on heating costs by allowing you to set the temperature in your crawl space based on your schedule. For example, you can set the temperature lower when you’re not at home or when you’re sleeping, and higher when you’re awake and using the space.

Tips For Improving Energy Efficiency

  1. Upgrade your HVAC system: If your HVAC system is old or inefficient, it may be costing you more money than necessary to heat your crawl space. Consider upgrading to a more energy-efficient system to save money on your heating bills.
  2. Use energy-efficient lighting: If you have lighting in your crawl space, consider using energy-efficient bulbs. LED bulbs, for example, use significantly less energy than traditional incandescent bulbs.
  3. Use a space heater: If you only need to heat a small area of your crawl space, consider using a space heater instead of heating the entire space. Space heaters are typically more energy-efficient than central heating systems.
  4. Close crawl space vents: In the winter, it’s a good idea to close crawl space vents to prevent cold air from entering the space. This can help reduce heating costs by keeping the warm air inside. However, be sure to open the vents in the summer to allow for proper ventilation.
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Things to Consider When Buying a Crawl Space Heater

Key factors to consider before purchasing a heater:

Type of heater: There are two main types of crawl space heaters – electric and gas.

Consider which type is most suitable for your crawl space.

Size of the space: Measure the size of your crawl space to determine the appropriate heater size.

A heater that is too small may not be effective, while a heater that is too large can be wasteful and costly.

Insulation: If your crawl space is not properly insulated, consider investing in insulation before purchasing a heater.

This can help to improve the efficiency of the heater.

Budget: Consider your budget and how much you are willing to spend on a heater.

Remember to factor in installation costs as well.

How To Choose The Right Size And Type?

  1. Electric heaters: Electric heaters are often more affordable and easier to install than gas heaters. They are ideal for smaller crawl spaces and are more energy-efficient in areas with mild winters.
  2. Gas heaters: Gas heaters are more expensive and require professional installation, but they are more efficient and cost-effective in larger crawl spaces and areas with colder winters.
  3. BTU output: Choose a heater with the appropriate BTU output for your crawl space. This will ensure that the heater can effectively heat the space without wasting energy.
  4. Safety features: Look for heaters with safety features such as automatic shut-off switches and overheat protection. These features can help prevent accidents and fires.

Removing Moisture from Your Crawl Space

Moisture can enter your crawl space through a variety of sources, including groundwater seepage, high humidity levels, and plumbing leaks.

Poor ventilation can also contribute to moisture buildup.

How To Reduce Moisture Levels?

To reduce moisture levels in your crawl space, you can take the following steps:

  • Install a vapor barrier: A vapor barrier is a sheet of plastic or other material that is installed over the soil in your crawl space to prevent moisture from seeping in. This is one of the most effective ways to reduce moisture levels.
  • Improve ventilation: Proper ventilation can help to circulate air in your crawl space, reducing humidity levels and preventing moisture buildup. You can install vents or fans to improve ventilation.
  • Fix plumbing leaks: If you have any plumbing leaks in your crawl space, be sure to fix them as soon as possible to prevent moisture from entering.
  • Address drainage issues: If you have groundwater seeping into your crawl space, you may need to install a sump pump or French drain system to divert water away from your home.
  • Seal air leaks: Air leaks in your crawl space can contribute to moisture buildup, so be sure to seal any gaps or cracks in your crawl space walls or foundation.

Tips For Preventing Mold And Mildew Growth

To prevent mold and mildew growth in your crawl space, you can take the following steps:

  • Keep humidity levels low: Mold and mildew thrive in humid environments, so it’s important to keep humidity levels in your crawl space below 60%. You can use a dehumidifier to help control humidity levels.
  • Inspect your crawl space regularly: Regular inspections can help you spot any moisture problems early, before they turn into major issues.
  • Keep your crawl space clean: Mold and mildew need organic matter to grow, so it’s important to keep your crawl space free of debris and clutter.
  • Ensure proper drainage: Make sure that water is draining away from your home, and that your gutters and downspouts are in good working order.

Ensuring Your Upstairs Stays Warm with a Crawl Space Heater

If you have a crawl space under your home, you may have experienced the challenge of keeping your upstairs rooms warm during colder months. One solution to this problem is installing a crawl space heater.

Not only can a crawl space heater keep your crawl space and floors warm, it can also benefit your entire home.

A crawl space heater can help regulate the temperature in your home, making it more comfortable and energy-efficient.

When your crawl space is cold, it can affect the overall temperature of your home, making it more difficult to maintain a consistent temperature throughout the house.

By installing a crawl space heater, you can help prevent heat loss and improve energy efficiency in your home.

When considering a crawl space heater, it is important to properly size it for your specific crawl space.

A heater that is too small may not provide enough heat to effectively warm the crawl space and the rooms above it.

On the other hand, a heater that is too large may waste energy and lead to increased heating costs.

To properly size a crawl space heater, you will need to calculate the square footage of your crawl space.

Once you have this measurement, you can consult with a professional or use a sizing chart to determine the appropriate size heater for your space.

In addition to sizing, it is important to consider the type of heater that will best suit your needs. Some common types of crawl space heaters include electric, propane, and natural gas heaters.

Each type has its own pros and cons, so it is important to research and choose the one that is best for your specific situation.

Considering Alternatives Before Purchasing a Crawl Space Heater

There are several alternatives to using a crawl space heater to warm your crawl space and home.

One option is to install additional insulation in your crawl space. This can help to prevent heat loss and keep your home warmer. Additionally, sealing any air leaks in your crawl space can also help to keep warm air inside.

Another alternative is to use a duct booster fan to improve the efficiency of your existing heating system. These fans can help to push warm air into your crawl space and distribute it throughout your home.

A third option is to install a radiant floor heating system. This involves installing pipes or electric heating elements beneath your floor, which then radiate heat upwards. This can be an effective way to warm your home, but it can be expensive to install.

Finally, you may want to consider using a space heater or portable electric heater in your crawl space. While these heaters are not as efficient as a permanent heating system, they can be a good temporary solution or supplemental heating source.

When considering these alternatives, it’s important to weigh the pros and cons of each option. For example, while adding insulation and sealing air leaks can be relatively inexpensive, it may not be enough to keep your home warm in extremely cold weather.

On the other hand, installing a radiant floor heating system can be very effective, but it can also be quite expensive. It’s important to choose the option that best fits your budget and heating needs.