How to Insulate a Garage

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garage insulation


Are you wondering how to insulate a garage? Garages can be a major source of heat loss in the winter. A well-insulated garage can help keep your garage warm and comfortable and can also save you money on your energy bills.  

With our easy-to-read step-by-step guide on insulating a garage, you can learn how to insulate your own garage and become a DIY pro. In this article, you will learn: 

  • The What and Why of insulating a garage  
  • The benefits of insulating a garage 
  • Choosing the right material for insulating a garage  
  • The best products for insulating a garage  
  • How to insulate a garage in an easy-to-read step-by-step guide 

What is garage insulation and why do I need it?  

Garage insulation is an important step to maintaining a comfortable temperature in your garage all year round. Insulation helps keep the warm air in during the winter and the cool air in during the summer. 

Most often, a garage is attached to at least one wall of a house, meaning this wall has the potential to lose heat very quickly. Garage insulation is a highly effective method for not only reducing your energy consumption, but also reducing energy bills and noise levels. 

The benefits of insulating a garage: 

Some of the benefits of insulating a garage include: 

  • Keep your garage cool in the winter  
  • Keep your garage warm in the summer  
  • Reduce noise pollution  
  • Reduce heat loss from other areas of your home  
  • Protect your belongings from the elements 

Choosing the right material for insulating a garage: 

Garages can be one of the most difficult rooms in a home to insulate. It's important to choose the right insulation material for your garage to make sure it's comfortable and energy efficient. Consider the size of your garage, your budget, and your personal insulation goals.  

Identifying whether your garage has cavities or not will also impact your insulation material choice.  

The best products for insulating a garage:  

If your garage has cavity walls, our Superglass – CAVITY – Superwall 36 is designed to provide excellent levels of thermal insulation, and is available in a variety of different sizes to suit your specific needs. 

However, if your garage does not have cavity walls and you want to insulate the ceiling as well as the walls, our Polystyrene EPS70 is the perfect high performance alternative, also available in a variety of sizes. 

How to install insulation for garage walls and ceilings with Polystyrene EPS70  

DISCLAIMER: This guide acts as a brief outline for garage insulation. Be sure to consult a professional before starting your project. 

Step 1:  

Measure the walls and ceiling of your garage to determine how much EPS70 insulation you need.  

Step 2:  

Prepare the wall and ceiling surfaces, making sure they are free from dust, dirt, debris or any other obstructions that might impede insulation installation.  

Step 3:  

Cut the EPS70 sheets to fit on the walls using a straight edge and utility knife. Make sure to account for corners and any obstructions in the walls.  

Step 4: 

Securely fasten the cut sheets of EPS70 onto the walls with adhesive caulk or construction adhesive. Be sure to use a leveller to ensure that all insulation is secured straight onto the wall. 

Step 5:  

For the ceiling insulation, use masonry screws with plastic anchors to hold the sheets in place, being very careful not to puncture any electric wires or ventilation ducts that may be present in your garage's ceiling area.   

Step 6:  

Apply insulation around windows and air vents using narrow strips of foam board or weather stripping if necessary.  


What are the benefits of insulating a garage?  

The benefits of insulating a garage include regulating the temperature in both your garage and your home, reducing your home’s energy consumption, reduced energy costs and noise pollution, and keeping your belongings safe from damaging weather. 

How do I know what type of insulation is best for my garage?  

To determine this, you should identify whether your garage walls are solid or have cavities, as this will greatly influence your material options.  

How much does it cost to insulate my garage? 

This depends on a number of factors. The pricing for garage insulation depends on the size of your garage, whether your garage has solid or cavity walls, and the chosen material among other things. 

Got more questions on how to insulate a garage? Get in touch with one of our experts today for detailed advice and guidance. 

DISCLAIMERThe contents of this guide are intended for information purposes only. Insulation king shall not be liable, answerable or accountable for any loss or damage resulting from the advice given

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