Insulating the Garage Door

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Insulating the Garage Door: Everything You Need to Know

If your garage feels like a freezer in the winter or a sauna in the summer, the problem may be your garage door. Insulating the garage door is one of the most effective ways to improve the energy efficiency, comfort, and functionality of your garage space. Whether you use your garage to park your car, store valuable tools, or as a home gym or workshop, insulation makes a significant difference.

In this blog post, we’ll cover everything you need to know about garage door insulation—how to insulate your existing door, the benefits, material options, and when it might be better to install a brand new insulated garage door from 247 Garage Doors.

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Insulating the Garage Door

Why Insulate Your Garage Door?

Many garages are connected to the main house or have a room directly above them. If the garage is poorly insulated, it can cause heat loss, draughts, and increased energy bills. Here’s why insulation matters:

Improved Energy Efficiency

Insulating your garage door helps regulate internal temperatures. This reduces the need for heating in the winter and cooling in the summer, saving you money on energy bills.

Increased Comfort

An insulated garage is far more comfortable to use year-round. Whether you’re working on a project, doing laundry, or using your garage as an office or gym, you’ll appreciate the stable indoor temperature.

Noise Reduction

Insulated doors provide better soundproofing, reducing street noise from outside and containing noise from within (such as power tools or gym equipment).

Protection for Your Belongings

Extreme temperatures can damage paint, stored items, and even vehicle components. Insulation helps protect everything stored inside your garage.

Better Security and Durability

Insulated garage doors are often more robust than single-skin doors, providing added resistance to forced entry and general wear and tear.

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Insulating the garage door

How to Insulate a Garage Door

If you’re not ready to replace your garage door, you can still improve its performance by retrofitting insulation. Here’s how:

Step 1: Assess Your Existing Garage Door

First, check the type of garage door you have—roller, sectional, or up-and-over. Most DIY insulation kits work best with sectional or up-and-over doors.

Step 2: Choose an Insulation Material

There are several options, each with its pros and cons:

Polystyrene Panels: Lightweight and affordable; offer decent insulation for a modest budget.

Foil-Backed Foam Boards: Rigid and effective; ideal for double garages or garages used as living space.

Reflective Foil Insulation: Good for reflecting radiant heat; often used alongside other materials.

Step 3: Clean the Door Surface

Ensure the door is clean and dry before applying any materials. Use a mild detergent to remove dirt and grease.

Step 4: Cut and Fit the Insulation

Measure each panel and cut the insulation to fit snugly. Most kits include adhesive tape or clips to secure the material in place.

Step 5: Seal the Edges

Use weatherstripping or sealant around the edges to reduce draughts and heat loss further.

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insulating the garage door

Upgrading to a New Insulated Garage Door

While DIY insulation is a good short-term solution, nothing beats a professionally manufactured and fitted insulated garage door. At 247 Garage Doors, we supply and install high-quality insulated doors throughout Newton Abbot, Exeter, Torquay, Plymouth, and across Devon.

Our insulated garage doors are made with double-skinned steel and high-density foam cores, offering superior thermal performance, enhanced strength, and a sleek appearance.

Benefits of Our Insulated Garage Doors:

Manufactured by top UK brands

Excellent U-values for maximum energy savings

Available in roller, sectional, and side-hinged formats

Huge range of colours, styles, and finishes

Optional automation and smart access control

Professionally installed by our local experts

Whether you’re building a new garage or upgrading your current setup, a new insulated garage door is a long-term investment in comfort, efficiency, and security.

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When Should You Replace Rather Than Insulate?

While retrofitting insulation can help, there are times when a new door is a better option:

Your existing door is over 15 years old

The door has visible damage, warping, or corrosion

You struggle with draughts and leaks despite insulation

You want a more modern, stylish, or automated solution

You use your garage regularly as a workspace or living area

If any of these apply, contact 247 Garage Doors for a free survey and quote.

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Insulated Garage Door FAQs

How much does it cost to insulate a garage door?
DIY insulation kits typically cost between £50 and £150, depending on the size of your garage and the material used. A professionally fitted insulated door starts from around £800, depending on the type and size.

Can I insulate a roller garage door?
Yes, but it’s trickier than sectional or up-and-over doors. Most roller doors are made from insulated slats already. If yours is single-skin, replacement may be a better option.

What U-value should I look for in an insulated garage door?
Lower U-values mean better insulation. A good insulated garage door will have a U-value between 1.5 and 2.0 W/m²K, depending on the construction and material.

Will insulating my garage door stop condensation?
Insulation can help reduce condensation by maintaining a more stable temperature, but adequate ventilation is also important to control moisture.

Do insulated garage doors make a difference to energy bills?
Yes. Especially in attached garages, where insulation helps reduce heat transfer to the rest of the house, lowering overall heating costs.

Talk to the Experts at 247 Garage Doors

If you’re considering insulating your garage door—or replacing it entirely—247 Garage Doors is here to help. We offer:

Free expert advice and no-obligation quotes

Full installation service across Devon

High-performance insulated doors in a wide range of styles

Excellent aftercare and servicing packages

Call us today or fill in our online enquiry form to get started. Insulate your garage the right way—with the help of local professionals you can trust.

Leading Insulated Garage Door Brands We Trust

When you invest in an insulated garage door, you want proven performance, rock-solid security, and a finish that complements your home. That’s why 247 Garage Doors partners with the UK’s most respected manufacturers—including Hörmann, Garador, SWS UK (SeceuroGlide), Novoferm, Alutech, Teckentrup, and Gliderol. Each brand offers double- or triple-skinned panels with high-density foam cores for exceptional U-values, alongside robust locking systems and a huge palette of colours, textures, and window options.

From Hörmann’s precision-engineered sectional doors to SeceuroGlide’s space-saving insulated roller models, we supply the perfect solution for every property style and budget. Better still, our fully trained engineers handle the entire process—survey, supply, and professional installation—so you enjoy flawless operation and industry-leading warranties from day one. If you’re ready to upgrade to a premium insulated garage door, talk to 247 Garage Doors and experience the best brands, fitted to perfection.

call us now for a free home survey

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