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A Guide On How To Insulate a Crawl Space Under Your House by HydroHelp911 for Huntersville, NC

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Insulation is essential for keeping a home warm while keeping energy expenses low. Insulating your crawl area is one of the most critical ways to keep your home warm. Crawl space insulation installation can help keep your crawl space from becoming a wet environment where mold and mildew thrive.

Controlling crawl space moisture and humidity is a two-step approach that aims towards the same result: a comfortable lower level that keeps higher floors warm while keeping your home’s foundation in good shape.

Crawl space is an underappreciated asset that can benefit your home in various ways. However, most people are unaware that crawl spaces can be hazardous and cause significant difficulties for homeowners. In addition, most house owners are unaware of the importance of properly maintaining their crawl area.

If you allow them to decay, they will become breeding grounds for mold and vermin such as termites, roaches, and rats. This will only make your house smell nasty, but it may also render structural damage in the long term!

In your area, HydroHelp911 is the leading crawl space insulation installation business. To assist you with any problems, we provide free estimates. Don’t hesitate to contact HydroHelp911 immediately since our team of experts will be able to answer and solve all of your queries about your crawl space issues.

You may rest assured that our organization is knowledgeable in all aspects of insulation and knows how to complete the job correctly the first time. You won’t believe how much money HydroHelp911 can help you save on your energy expenses each month! Don’t hesitate to get in touch with us right away.

Basics of Crawl Space Insulation

Stapling fiberglass batts to the underside of your home’s floor between joists causes several issues. While this strategy works quickly, moisture builds up in the crawl space and develops on this porous surface. Fiberglass exposed to water becomes heavier and begins to sag and fall. This antiquated strategy is not only ineffectual but also retrograde.

Instead, a multi-pronged solution of insulating the crawl space’s inside walls with stiff foam, placing down a plastic vapor barrier over the ground floor, and taping the two items together is a superior option.

The aim is to treat the crawl space the same as other house portions. Rather than attempting to isolate the crawl space from the conditioned upper floors, you should remove the underfloor insulation and seal the crawl space against outside humidity and temperature to bring it closer to the top floors’ temperatures.

Types of Crawl Space Insulation

When it comes to insulating crawl space, there are various options accessible to you. Fiberglass rolled, or batt insulation, rigid foam insulation, and wood fiber insulation are all choices for crawl space insulation. The two most prevalent types of crawl space insulation are fiberglass rolled or batt insulation and rigid foam insulation.

The thermal heat transfer capabilities of insulation are rated. As a result, each insulation type is assigned an R-value, which indicates its thermal insulating ability. The “R-value” measures heat flow resistance; the more significant the R-value, the better the insulation prevents heat transmission. On the insulation package information, the R-value is always clearly marked. However, if you have any concerns, consult an insulation salesperson.

Top Tips for Insulating Crawl Space

  1. Use insulation that inhibits damage from water (not fiberglass or cellulose).

    Any rigid board insulation will suffice, but polyisocyanurate has the highest R-value (6 to 7 per inch). Unfortunately, commercial roof insulation makers occasionally have leftovers and seconds.
  2. Remove sources of water in the crawl space before doing anything else.

    Downspouts should be extended, gutters should be maintained, and sidewalks, patios, and flower beds should be regraded to slope away from home. Install a sump pump or a basement waterproofing system if necessary.
  3. Insulate the walls, not the ceiling.

    Construction adhesive or mechanical fasteners can be used to install rigid boards. You might also use an insulating mat to cover the crawl space’s floor.
  4. Ensure that hatchways to the outer walls are sealed.

    To ensure a tight seal, use heavy-duty weather stripping or buy a crawl space hatchway that has already been built.
  5. Seal rim joists and sills.

    Fill the ends of the joist bays with rigid board insulation rectangles. To seal the joints, use a foam sealer like “Great Stuff”. Next, close the seam between the top of the crawl space wall and the sill using caulk or foam sealant.
  6. Enclose all vent openings.

    Vent covers are available in conventional sizes and can be placed outside. Alternatively, you can create your own out of plywood and caulk them in place.
  7. Install air and vapor barrier over the floor and clip it to the insulation.

    Vapor barriers made of plastic come in a variety of thicknesses. Choose a barrier that can withstand foot traffic if you plan to utilize the contained space for storage.

Crawl Space Ventilation

The crawl space ventilation to the outside is sealed off for this insulation system. In addition, all exits to the outside have been closed or caulked.

Your house will be more energy efficient as a whole if you have an airtight, insulated crawl room since it will keep your floors warmer in the winter and so lower your heating expenditures. This process works in reverse during the summer season, keeping your flooring cooler and lessening the strain on your air conditioner.

No Insulation in Crawl Space

Non-existent or inappropriate crawl area insulation may cause your flooring to feel very cold. Excess dampness, chilly flooring, mildew, and rot issues are just a few of the problems that might occur due to poor crawl space insulation.

When your ground level is lifted off the ground, crawl space insulation is used to keep your building environment intact. In addition, the insulation in your crawl space helps keep the temperature in your conditioned space consistent.

An adequately installed crawl space insulation installed and maintained will:

  • Increase your home’s energy efficiency.
  • Keep your house cooler on hot and humid days, and keep it warmer on cold days.
  • Improve the air quality in your home.

What Happens if a Leak Causes Damage to my Crawl Space and I Need Home Restoration?

Crawl areas of all shapes and sizes are prone to water damage and moisture retention. If this is the situation in your home, you’ll be asking how to dry it out the crawl space after a leak. This is how to go about it:

  • The first step is to locate and rectify the leak’s source.
  • Using towels and whatever else absorbent you can find, dry out the more
  • enormous puddles of water. When it comes to cleaning and preventing moisture in the crawl space, a crawl space dehumidifier can help.
  • After that, if the insulation has become wet, you’ll need to replace it.
  • Also, make sure to get rid of any damp trash and any evident mold development (this is best handled by a professional).

Maintain a dry and mold-free crawl space! We provide the highest quality insulation installation services to safeguard your home from water damage and mold growth in your crawl space. HydroHelp911’s products are simple to set up and economical.

When you choose us as your insulation provider, you’ll never have to worry about dampness or moisture in your home again. Nobody wants your family to feel uncomfortable because you failed to address their insulation needs while you had the opportunity. Please don’t allow this to happen!

Call HydroHelp911 today to begin improving your home’s energy efficiency before winter arrives! There’s no reason why everyone shouldn’t have a warm and toasty winter season ahead of them with our experienced installation services.

We also provide free estimates on any job, so please contact us if you have any questions or want a quote before deciding! HydroHelp911 guarantees that no matter how big or small the task is, we will approach it with the highest care and provide exceptional service at every stage.



As part of overall home air sealing and insulation, Crawl space insulation installation helps improve your home’s energy efficiency. Without insulation, heat and cold air can escape through the floor. The two types of crawl spaces are ventilated and unventilated, and each requires a different kind of insulation.


For crawl spaces, uninsulated floors, ground fog, air sealing, insulated walls, and indoor air conditioning are recommended. In addition, R-values of at least R-9 in floor insulation are guided by the Department of Energy. As a result, the answer to the question “should a crawl space be insulated?” is a resounding “yes.”


Encapsulating your crawl area and the rest of your home is a beautiful way to keep it dry, healthy, and efficient. But, the crawl space guys said, “Dehumidify.” Remove the insulation before dealing with any mold, treat if necessary, then replace the insulation.

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