How to Insulate a Crawl Space: A Step-by-Step Guide

If your home has a crawl space, you should educate yourself about how to insulate a crawl space. A well-maintained crawl space streamlines your home’s electrical, plumbing, gas, and sprinkler system. Learning how to insulate a crawl space has a lot of benefits, especially if you live in a humid environment prone to moisture-related problems.

Plus, you can keep mold and pest infestations at bay, improving the efficiency of your HVAC system. A professional foundation repair and maintenance service can show you how to insulate a crawl space.

Nearly 20% of homes in the US have crawl space. Crawl space insulation means creating a strong moisture barrier, sealing foundation vents, insulating walls, and installing a dehumidifier.

In this blog, we’ll delve into tips of how to insulate a crawl space, a space ceiling, and more.

 

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Learning how to insulate a crawl space has plenty of benefits in dank environments

How to insulate a crawl space?

1) Prepare your space

First, take a look at the problems you need to solve before installation.

 

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2) Improper drainage system

If you notice a puddle of water in your foundation, talk to a drainage company to have it fixed before doing the insulation.

3) Mold growth

If you live in a humid environment, chances are your crawl space is suffering from mold growth issues. Before considering insulation, check your flooring and HVAC systems for signs of mold and treat as you prepare your area for the actual insulation project.

4) Install a heavy-duty plastic vapor barrier

Use a heavy-duty plastic vapor barrier that covers all nooks and crannies to prevent moisture from entering your crawl space.

 

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The vapor barrier or vapor retarder is that grayish plastic you see over there

 

5) Seal all gaps

It is critical to seal all openings and air gaps that let outside air into your crawl space. You need to know how to insulate a crawl space with foam board to do this.

 

How To Insulate Your Crawl Space With Foam Board?

Insulating you crawl space can help you keep moisture at bay. One way to do it is with foam board. Learn how to insulate your crawl space with foam board in a few steps.

 

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Step 1 – Measure Your Space

You have to make your measurements to be sure how much crawl space you will work on. Measuring the space will also give you a clue of how much foam board is needed.

Measure the vapor barrier and the width and length of the crawl space to know exactly how much of this you will use.

Step 2 – Apply Adhesive

It is time to apply adhesive to the walls where you will be putting the foam board and the barrier. Construction adhesive is best for this.

Step 3 – Secure Vapor Barrier

After this, you need to lay the vapor barrier and smooth it out with your hand to secure it. The plastic must be in the correct position and the vapor barriers on each wall.

Step 4 – Prepare Foam Board

Simply cut the foam board the same size of the wall and do not leave any gaps at the end of the walls.

Step 5 – Apply Adhesive, Secure Boards

It will be necessary to apply another adhesive layer to play it safe. Adhere the foam board pieces properly and smooth them out with your hands. Do the same procedure on each wall.

Step 6 – Seal Gaps

Use expanding foam to seal the remaining gaps you couldn’t seal upon laying the first layers. Pay attention to the corners and other gaps.

Now, we’ve learned how to insulate a crawl space with foam board, let’s go into how to insulate a crawl space ceiling.

 

How to insulate a crawl space ceiling

Step 1 – Select the type of insulation

You can choose a type of insulation like R-value or any other. This decision relies on the reasons for the insulation.

There are several options, but pick one that resists heat flow. Another option that delivers excellent results is the coated formaldehyde-free fiberglass insulation.

 

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Step 2 – Get some protective clothing

You can’t perform any insulation process without protection. Find a pair of protective gloves and a mask.

Step 3 – Measure the area

Measure up the entire ceiling, putting more focus more on the joists. You have to leave broken pipes and cables exposed.

Step 3 – Take care of pipes and cables

Wedge the insulation between the roof and the pipes. Do the same around the cables.

How much does crawl space insulation cost?

The cost of the insulation depends on factors such as the size of your crawl space, its current condition, the materials used, and the contractor you choose to hire. It is around $7,500, going as high as $30,000.

 

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To sum up

Crawl space insulation requires more than a financial investment. You risk wasting your time and money if you are unsure about how to install insulation in a crawl space. It’s critical to choose a reputable company that knows exactly how to insulate a crawl space in all cases.

 

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