What Is The Best Insulation For A Flat Roof?

What Is The Best Insulation For A Flat Roof?

What Is The Best Insulation For A Flat Roof?

Closed-cell polyurethane spray foam will be perfect for flat roof thermal insulation. An insulating solution of this type entails adding numerous layers of PUR foam, each around 1-2 cm thick.

As needed, the thickness of the effective roof insulation layer might range from 3 to 12 cm. It is noteworthy that the higher the thickness of the foam layer installed on your roof, the more efficient it will be at insulating and keeping your flat roof cool in summer.

And since PUR foam is highly vapored permeable, it will not cause any leaks or water damage.

What Is The Minimum Insulation For A Roof?

An uninsulated flat roof has a U-Value of around 1.5 W/m2K. Without insulation, the roof will lose heat at a rate of 1.5 Watts per square meter of surface area for every degree of the temperature difference between the inside and outside of the building.

When insulating one, you aim for a value of 0.25 W/m2K or less. This can be achieved by insulating your flat roof with insulation boards around 150mm. It is also worth mentioning that some insulations like Styrofoam and EPS do not require a vapor barrier.

Will Open-Cell Spray Foam Insulation Rot Your Roof?

Open-cell spray foam insulation will NOT rot your roof if you do it right. Being a water-resistant product, it will protect the roof from moisture and let it breathe.

So if you install the foam properly, this won’t be an issue. It will make the roof last longer and help insulate it properly.

Is Styrofoam Good For Roof Insulation?

Styrofoam is an excellent material for roof insulation due to its high R-value. There are many benefits to using Styrofoam for roof insulation.

For one, EPS and STYROFOAM Brand Foam have excellent R-values, making them ideal materials for insulating interior and exterior walls, roofing, and under slabs.

Additionally, Styrofoam is lightweight and easy to work with, making it a great option for do-it-yourself projects. It is also moisture resistant, which is important in preventing mold and mildew growth.

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