Technical Guide to the Igloo Crawlspace: Features and Installation of Aerat 2026

The igloo crawlspace is a system of modular formworks made of regenerated polypropylene designed to create a ventilated cavity under the ground floor slab. This self-supporting structure insulates the building from rising damp and promotes the dispersion of radon gas, ensuring healthy environments.

How the Modular Formwork System Works

The creation of a sanitary cavity uses prefabricated elements of variable height, laid interlocking to quickly cover the base surface of the building. This platform becomes immediately walkable, ready to receive the concrete pour. The recycled plastic modules form a solid slab supported by a grid of small pillars, leaving an empty space underneath for ventilation.

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Technical Table: Specifications and Materials of the Igloo Crawlspace

Technical Advantages of the Aerated Igloo Crawlspace

Adopting this technology offers thermal and sanitary performance significantly superior to the traditional gravel base historically used to raise buildings from the ground.

Protection from Radon Gas and Moisture

The void created under the flooring acts as a physical barrier against moisture. Installing pipes connected to the outside allows natural ventilation of the air chamber. The constant air circulation expels accumulated vapors and disposes of radon gas, an inert, odorless, and radioactive element resulting from the decay of uranium in the earth's crust.

Adaptability in Seismic Zones and System Routing

The modular structure is also suitable for seismic areas thanks to the possibility of connecting the reinforcement to the perimeter beams. Furthermore, the free cavity allows for easy routing of electrical and plumbing systems without compromising the insulation layer.

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Installation Phases of the Crawlspace

1. Ground preparation: Leveling and compacting the ground, laying a geotextile fabric to separate the ground from the cavity.
2. Positioning the igloos: Placing the modular elements side by side and interlocking them to create a uniform surface.
3. Reinforcement: Laying welded wire mesh over the igloos and connecting it to the perimeter beams if required for seismic adaptation.
4. Concrete pour: Pouring the concrete slab directly onto the walkable platform, integrating any underfloor heating systems.
5. Ventilation: Installing perimeter vents or vertical ducts to ensure natural air circulation in the cavity.

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Expert Tips for Correct Installation

• Always check the ground bearing capacity before starting the installation.
• Use igloos of adequate height based on the ventilation needs and the expected radon concentration.
• Ensure a minimum slope of the ground for any water drainage.
• Seal all joints between modules to prevent concrete leakage during the pour.
• Plan the position of vents to optimize cross ventilation.

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Frequently Asked Questions About the Igloo Crawlspace

What is the main function of the igloo crawlspace?

The primary function is to create a ventilated cavity that protects the building from rising damp and facilitates the expulsion of radon gas, improving indoor air quality.

Can the igloo crawlspace be used in seismic zones?

Yes, the system can be adapted for seismic areas by connecting the welded wire mesh reinforcement to the perimeter beams, increasing the structural rigidity of the slab.

How long does it take to install an igloo crawlspace?

Installation is relatively quick: for a standard house, positioning the igloos and pouring the concrete can be completed in a few days, depending on the surface area and weather conditions.

Is the igloo crawlspace compatible with underfloor heating?

Absolutely. The igloo crawlspace is an excellent base for underfloor heating systems, as the cavity provides insulation and allows easy routing of the heating pipes.

What maintenance does the igloo crawlspace require?

Maintenance is minimal. It is advisable to periodically check that the perimeter vents are not obstructed to ensure proper ventilation of the cavity.

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