Thermal insulation of the attic floor

If the attic is not used as living space, the top floor slab must be well insulated. You can do this with our white EPS boards; we recommend the grades Austrotherm EPS A100, Austrotherm EPS A120 or even Austrotherm EPS A150.

For new buildings and for thermal refurbishment.

With these products you can also insulate an attic that has not been insulated before. Remember that in a completely uninsulated building up to 25% of all energy (heat) losses occur through the top floor slab, i.e. from the last "normal" storey into the attic. Good insulation considerably reduces these losses, lowers the occupants' costs and improves the building's energy efficiency. The products listed above are high-quality insulation solutions that are also very easy to install.

Laying the EPS boards

• 1. Armiranu betonsku ploču dobro očistiti.
• 2. Višeslojno (npr. 2-slojno) unakrsno postavljanje ploča od stiropora donosi više prednosti u poređenju sa jednoslojnim postavljanjem. Detaljnije o tome pročitajte u nastavku teksta ("Značaj i svrha termičke izolacije poslednje međuspratne ploče").
• 3. Ploče od stiropora se postavljaju počevši iz jednog ugla. Poslednja ploča u jednom redu, ukoliko mora da se iseče, treba da bude isečena običnim građevinskim nožićem ili manjom građevinskom testerom.
• 4. Kada je termoizolacioni sloj postavljen, odozgo treba da se postavi sloj od materijala koji će omogućiti da se po potkrovlju hoda. Tu se najčešće koriste tzv. "OSB"-ploče, ploče od iverice itd.

Why insulate the top floor slab

If the attic is not used for living or working (i.e. people do not spend long periods there), it is logical not to heat it. All the more important, then, to insulate the top floor slab by laying insulation on the attic floor, so that as little heat as possible "drains" from the heated storey below into the unheated attic and from there out of the building.

Where possible (if there is enough height), we recommend laying the attic floor insulation in several layers. With two layers, the EPS boards of the upper layer, laid crosswise to those of the lower layer, cover the joints of the lower layer, which makes the insulation monolithic. Moreover, with multi-layer (and therefore thicker) insulation you do not need to lay a PE foil (a vapour barrier against condensation) on the concrete slab first, because a thicker EPS layer has enough resistance to water-vapour diffusion.

Austrotherm EPS A120 in a floating floor

1. 1screed
2. 2PE foil
3. 3Austrotherm EPS A120
4. 4fine sand (as a levelling layer)
5. 5Austrotherm XPS P
6. 6Austrotherm EPS AF PLUS
7. 7PE edge strip

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