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Frequently asked questions

When designing a facade with thermal insulation material, is it preferable to place it on the inside or the outside?

Thermal insulation layer, in spaces that are constantly heated, need to be on the outside, because it is preferrably from the aspect of diffusion of water vapor and barrier thermal stability. Besides, in case where thermal insulation is on the inside, object construction is much more exposed to temperature oscillations. Thermal insulation on the inside can be acceptable just in objects that are perioadically heated.

How to properly perform the insulation of the attic or roof structures?

Most important is to keep in mind the physics processes of object, especially diffusion of water vapor, while making insulation of roof stractures. Considering that, thermal insulation layer in roof structures has to be porotected with two foils. On the lower side vapor barrier, to prevent diffusion of water vapor, and the upper side "condensation foil", wich is waterthight but vapor permeable. Therefore, some water vapor can evaporate, while summer months. Recommended thickness of thermal insulation layer of roof structures is min. 16cm.

Can you produce EPS with slope?

EPS with slope is mostly used for flat roof structures, but in case that is classical flat roof (thermal insulation under hydroisloation). For the reverse flat roofs is necessarily to use XPS, because of exposure to humidity. EPS with slope is a very good replacement for concrete with slope, especially because of its weight.

Is there an determined lifetime of EPS?

EPS has no duration. Facades made before 50 years are proof for that. In those facade systems thermal insulation layer completely fulfills his function. While making facade every layer in it's system has to be installed according to the rules of profession and manufacturer's requests.

Does EPS comply with fire protection regulations?

EPS is a material that does not support fire, but when temperature is higher of 100oC it melts and leaks. But when facade system is made by regulations of profession, according to EU standards it satisfy norm B1, wich means that it can be normally used for facade systems.

Is the EPS sufficient vapor permable?

Prilikom projektiranja, ukoliko se koriste odgovarajući programi za građevinsku fiziku objekata, može se utvrditi kako objekti izolirani EPS-om u potpunosti zadovoljavaju po svim kriterijima glede paropropusnosti, kondenzacije i isušivanja.

We can check does EPS meets all terms of building physics if useing some programs for it, while projecting objects. Those terms are for example  diffusion of water vapor, condensation and draining.


What is EPS?

The desire for a pleasant and more rational way of living has resulted in an increased usage of thermal insulation in construction.

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Thermal calculation

EPS LASTRO has designed a computer program for calculation of thermal efficiency, which provides and facilitates our clients with a…...

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Frequently asked questions

Find out the most important answers to questions about thermal insulation of buildings, installation of EPS and material characteristics.

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