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Spray Foam & Coating Equipment, Parts, Training, Material

Prepping a Garage for Spray Foam Insulation

by | Mar 5, 2025 | Blogs, Maintenance, Spray Foam

spray foam insulation in a garage

Before applying spray foam insulation to a garage, proper preparation is essential. Thorough prep work helps set contractors up for success, while also reducing the risk of costly mistakes and delays.

What Needs Done Prior to Applying Spray Foam Insulation in a Garage?

Whether you’re trying to increase comfort within your garage or improve energy efficiency, proper preparation will be crucial. By following these initial steps, you’ll be well on your way to achieving high-quality results when adding spray foam insulation in a garage.

  • Clear the space – You want to be sure that everything is out of the garage and that it’s free from obstructions as well as dirt and debris.
  • Inspect the walls – You want to check the walls for any existing damage, including cracks or moisture buildup. It’s important to address these issues before moving forward with insulation because they could negatively affect the end result.
  • Disconnect utilities – Before starting spray foam insulation in a garage, you want to make sure all utilities are disconnected or turned off. This extends to plumbing, gas lines, and electrical lines. Additionally, you will want to cover any switches or outlets to prevent foam from entering them.

 

How to Best Insulate a Finished Garage

When insulating a finished garage, it’s crucial to strike a balance between efficiency and the quality of the installation to meet both code requirements and performance standards. Proper installation is important as it helps enhance comfort but also reduces long-term operational costs. Some key steps to ensure a successful project include:

  • Assess your needs – You’ll want to determine the specific needs for your project, as this will help you decide which materials and techniques to use for your garage. Some factors to consider include weather patterns, garage usage, budget, and if there is any existing insulation.
  • Select the appropriate material – This is a crucial step as each material has different characteristics and advantages. Choosing spray foam insulation means creating a continuous air seal, reducing energy loss. It’s also a long-lasting option and provides excellent insulation.
  • Install insulation between studs – This is a common method for insulating garage walls, and it will require gathering tools, prepping the area, measuring, and then applying the insulation. You’ll want to start at the bottom, compress gently, and then fill any sort of gaps between the studs and insulation. You can use caulk or sealant to help fill them.
  • Install insulation on exterior walls – If you’re looking for enhanced comfort and energy savings, you’ll want to insulate exterior walls by assessing the exterior finish, prepping the surface, and installing furring strips. After that, you’ll install insulation boards and reinstall any exterior finish if necessary.
  • Seal any gaps or air leaks – It’s essential to seal any gaps or cracks you notice to prevent air infiltration. First, seek out any visible cracks or gaps around windows, outlets, doors, or other openings. Next, use a high-quality caulk to seal them and apply sealant to any larger ones. For windows or doors, you can also install weatherstripping for added protection.
  • Apply last-minute touches – The last step involves adding on any finishing touches if you desire, such as using drywall or finishing materials over the insulated walls. You may also want to ensure there is adequate ventilation to prevent any moisture buildup and mold growth.

Why Contractors Choose SprayWorks Equipment

When it comes to applying spray foam insulation to a garage, having access to reliable and high-quality materials and equipment can make all the difference to your results. Whether you’re a seasoned professional or just starting out, SprayWorks Equipment is your go-to-shop for materials, equipment, supplies and certified spray foam training. Some reasons contractors choose to work with us include:

  • Experience – We have over 100 years of combined polyurethane industry experience and have seen it all. Our certified professionals are always ready to answer your questions and help you find the ideal solutions.
  • Quality equipment – Our equipment is designed with the customer in mind and engineered for superior performance. Additionally, they are made in the USA and backed with a manufacturer’s warranty.

FAQs About Spray Foam Insulation in Garages

Do you add electrical systems before using spray foam insulation?

Yes. Spray foam insulation is installed in new constructions after the roof and windows are put in, and the electrical, framing, and plumbing inspections are complete. So yes, any electrical system found behind drywall needs to be completed before spray foam can be applied.

Do you have any tips on applying spray foam insulation to a garage?

When applying spray foam insulation to a garage, be sure to never spray a wet surface. When a surface has moisture attached to it, such as a wall that’s recently experienced water damage, spray foam won’t stick. If you need to test moisture levels, invest in a moisture meter. Our experts have plenty of other tips up their sleeves that they’ve learned over time, such as how to keep material warm, insights on spray gun safety, and more.

What challenges may I run into when insulating garages?

Some challenges you might face include working with uneven surfaces, navigating tight spaces, and addressing any problems such as leaks, cracks, or even pest infestations.

How do I manage overspray in a client’s garage?

You’ll want to use plastic sheeting, drop cloths, and masking tape to protect areas not being insulated and to help reduce any cleanup time.

Get Started with SprayWorks Equipment Today

What sets SprayWorks Equipment apart is our commitment to quality, both in the products we offer and the services we provide. From top-tier equipment to expert guidance, we’re here to support the success of your spray foam business.

Contact us today to learn how our expertise and products can help with applying spray foam insulation to a garage.

Written by: <a href="https://sprayworksequipment.com/blog/author/john-davidson/" target="_self">John Davidson</a>

Written by: John Davidson

John Davidson is Partner and VP of Operations at SprayWorks Equipment and is an SPFA PCP Certified Roofing and Insulation Installer, Roofing and Insulation Project Manager, and Supplier Rep. With over 35+ years of experience in the spray foam and polyurea industry, John brings a wealth of knowledge and hands-on experience. He has worked on commercial and residential buildings, bridges and infrastructure.

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