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The Comprehensive Guide: Can You Insulate Exterior Brick Walls?

With home preservation and energy efficiency, one question often looms large for homeowners with brick exteriors: is it feasible to insulate exterior brick walls effectively? With rising energy costs and the push towards more sustainable living, the insulation of your Maine brick home isn’t just a matter of comfort – it’s a necessity for energy conservation and reduced utility bills.

At Seal It, we understand the complexities involved in maintaining the integrity and aesthetic of your cherished brick homes while enhancing their energy efficiency. This guide dives deep into the nuances of insulating brick walls from the outside, ensuring your house remains comfortable and sustainable.

The Basics of Brick Home Insulation

Brick homes have a timeless appeal, but they often fall short in the insulation department, especially older structures that predate modern energy codes. 

Unlike their modern counterparts, these old souls weren’t designed with insulation in mind, posing a unique challenge for homeowners. Solid masonry can allow heat transfer more readily than insulated cavity walls, leading to higher heating and cooling costs.

What are the Options for Insulating Brick Walls?

Insulating brick walls externally comes with its set of challenges and solutions. Traditional methods, like internal insulation, can disrupt the interior aesthetics and space of your home. 

Fortunately, technology and innovation have paved the way for more sophisticated solutions, such as foam insulation and spray foam options, tailored specifically for the unique needs of brick homes.

The Advantages of Spray Foam Insulation for Brick Houses

Among the arsenal of insulation methods, spray foam stands out for its versatility and efficacy. This method involves applying a liquid foam that expands to fill every nook and cranny, forming a tight seal against air leakage and heat transfer. 

Its adaptability makes it ideal for the irregular surfaces and hard-to-reach areas typical of brick houses, and it offers superior thermal resistance and moisture control.

Insulation Brick Slips: Combining Aesthetics and Efficiency

For those who value the external appearance of their brick homes as much as their comfort and energy efficiency, external wall insulation systems with brick slips offer a promising solution. 

This method not only enhances the thermal performance of your walls, but also allows for a customizable exterior finish that can mimic the original brickwork or introduce a new aesthetic.

When External Insulation Isn’t an Option

In some instances, insulating from the outside might not be practical due to regulatory restrictions, space constraints, or budgetary considerations. In such cases, internal insulation becomes a viable alternative. 

While this approach may require compromise on internal space and a careful selection of materials to manage moisture, it will certainly improve your home’s insulation.

How to Choose the Right Insulation Method for Your Brick Home

Deciding on the best insulation method for your brick home requires a balanced consideration of various factors – including the building’s age, the climate, and budget. It’s crucial to consult with professionals who bring not only expertise in insulation, but also an understanding of the unique challenges posed by brick structures.


Insulating exterior brick walls is more than an upgrade; it’s a long-term investment in your home’s functionality, comfort, and efficiency. With the right approach and expert guidance, you can overcome the challenges and enjoy the benefits of a well-insulated brick home.
Feeling inspired to take the next step towards insulating your brick home? Get a free quote from Seal It Insulation Systems today! Together, we can unlock its full potential, making it as energy-efficient as it is aesthetically pleasing.

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