Polynor Kosova Isolation Metal Garage Information

Everything You Need to Know About Insulating Metal Surfaces with POLYNOR Foam

"I have a typical metal garage. It's great to have one on the property, but the problem is, when you're inside, it feels like you're outside..."

This is a common complaint from clients looking for solutions to their issues with condensation, noise, and high summer temperatures. Garages, shipping containers, hangars, and any other sheet metal structures face the same challenges. POLYNOR offers an effective solution to these problems.

What are the benefits of insulation with POLYNOR foam?

Resistance to high temperatures: The garage can reach 80°C on hot days, but POLYNOR remains stable up to 120°C.
Perfect fit: The foam fills every space and ensures perfect adhesion.
Acoustic insulation: Significantly reduces external noise.
Structural reinforcement: The foam helps stabilize metal sheets during strong winds.
Flexibility: Adapts to the natural contraction and expansion of metal.
Rodent resistance: Does not attract mice or insects.

Main Rules for Applying POLYNOR

Metal temperature: Should be between 10–30°C for proper adhesion.
Surface cleaning: Removes oils and dust to ensure a successful application.
Surface dryness: Metal must be completely dry to avoid adhesion issues.

Frequently asked questions

Can it be applied over felt-covered material? Yes, but only if the felt is well bonded to the metal.
What thickness is recommended? For condensation: 3 cm. For thermal insulation: 5–10 cm.
Should the surface be moistened before application? No! Moisture reduces foam adhesion.
How should the foam be applied? In two layers for an even and effective finish.

Special care

Ventilation: Install some ventilation holes to avoid internal moisture.
UV Protection: Paint with acrylic paint to prevent sun damage.
Safety: Use a mask and face protection during application.
Tool Protection: Cover objects in the garage to avoid staining.

What should you keep in mind?

Ventilation

A garage insulated with foam creates a sort of “thermos,” and as a result, any moisture brought inside the garage—such as snow on your shoes—will stay there. Make some holes at the top of the garage to allow moisture to evaporate.

Adhesion Test

To ensure your insulation is properly bonded, test it on a small area and then try to remove it. Well-adhered foam will leave a “frosting” on the metal surface that is hard to peel off.

UV Protection

Protect the foam from UV rays. If the foam is hidden under a cover—such as an OSB panel—then there is no need to worry, as UV won't reach it. If the foam is exposed, consider painting it with acrylic paint, especially if the garage is often opened in summer and sunlight enters inside.

Health and Safety

Protect your face and respiratory tract during application. People insulating the ceiling are especially exposed to inhaling foam particles. We recommend the protection set “face shield + mask.” Wear old clothes or a painter's uniform.

Dirt Protection

If you can’t empty the entire garage before insulating, make sure to properly cover the items stored there. Dried foam is very hard to remove.

Frame Preparation

If you plan to cover the insulation with a protective layer, now is the best time to build a frame for installing panels, such as OSB. A few small beams placed into the structure will make the panel installation process easier.

If after reading this blog you still haven’t found the answers you’re looking for, we encourage you to contact us by phone.

Insulation of a sheet metal garage / container / hall / warehouse / hangar