Floor insulation for CircoFloor

In the CircoFloor system, different types of loose insulation granules can be used as floor insulation. Below is a brief overview of some insulation materials and their technical advantages.

Recycled cork granules from wine bottles.

Easy to install yourself - Continuous insulation due to fine granules (no remaining joints or gaps) - High heat storage capacity - Very good sound insulation - Moisture-regulating properties - No emission of harmful volatile substances (wine smell disappears after a short time) - Not eaten by rodents

115 kg/m³

Lambda: 0,047 W/mK

Graphite recycled EPS bead.

Superior thermal insulation thanks to graphite - Energy-saving - Lightweight and easy to process - Moisture-resistant - Durable and long lifespan - Recyclable material

14 kg/m³

Lambda: 0,034 W/mK

Less heat loss through the walls

Comparison of edge heat loss PUR versus CircoFloor — In a classic PUR screed floor, heat penetrates directly into the wall via 9 cm of sand cement and a narrow edge strip. With the CircoFloor system, super-light EPS runs up to the Ytong, which means that the heat must first pass through a layer that conducts only one tenth as well. The result: more than 80% less edge loss (ψ = 0.008 W/mK instead of 0.044 W/mK). With CircoFloor, only 1% of the heat is lost via the outer walls, compared to 5% with a traditionally sprayed PUR + screed screed floor and even +10% with walls with windows down to the ground. For an average terraced house, this saves approximately 300 kWh of heating energy per year, and you prevent cold bridge condensation in the corners.

Complete insulation tables per type of floor construction

This table provides a comprehensive comparison of Rd values for all common floor constructions and floor insulation:

CircoFloor with EPS beads and cork granules, sprayed PUR with screed, insulation screed and insulation screed combined with PUR plates and screed.

With new EPS beads lambda: 0.032 W/mK

Insulation value taking into account the thermal conductivity of the structures, legs and OSB.

CircoFloor height (cm)	+ OSB height 1.8 cm	Rd value in structure	Rd value under structure	Rd value 18 mm OSB	Total Rd value floor structure	Rd value without heat loss walls
9.2	11	2.1043	0.107	0.138	2.350	2.468
10.2	12	2.1043	0.418	0.138	2.661	2.794
11.2	13	2.1043	0.730	0.138	2.973	3.121
12.2	14	2.1043	1.042	0.138	3.285	3.449
13.2	15	2.1043	1.355	0.138	3.598	3.777
14.2	16	2.1043	1.667	0.138	3.910	4.106
15.2	17	2.1043	1.980	0.138	4.222	4.434
16.2	18	2.1043	2.292	0.138	4.535	4.762
17.2	19	2.1043	2.605	0.138	4.847	5.090
18.2	20	2.1043	2.917	0.138	5.160	5.418
19.2	21	2.1043	3.230	0.138	5.472	5.746
20.2	22	2.1043	3.542	0.138	5.785	6.074

With recycled cork granules lambda: 0.049 W/mK

Insulation value taking into account the thermal conductivity of the structures, legs and OSB.

CircoFloor height (cm)	+ OSB height 1.8 cm	Rd value in structure	Rd value under structure	Rd value 18 mm OSB	Total Rd value floor structure	Rd value without heat loss walls
9.2	11	1.587	0.078	0.138	1.803	1.893
10.2	12	1.587	0.290	0.138	2.015	2.116
11.2	13	1.587	0.503	0.138	2.228	2.339
12.2	14	1.587	0.715	0.138	2.441	2.563
13.2	15	1.587	0.928	0.138	2.653	2.786
14.2	16	1.587	1.141	0.138	2.866	3.009
15.2	17	1.587	1.354	0.138	3.079	3.233
16.2	18	1.587	1.566	0.138	3.292	3.456
17.2	19	1.587	1.779	0.138	3.504	3.680
18.2	20	1.587	1.992	0.138	3.717	3.903
19.2	21	1.587	2.205	0.138	3.930	4.126
20.2	22	1.587	2.417	0.138	4.143	4.350

With sprayed PUR lambda: 0.023 W/mK

Floor construction height (cm)	Pure height (cm)	Screed height (cm)	Rd value PUR	Rd value Chape	Total RD value
9	3	6	1.304	0.043	1.347
10	3	7	1.304	0.050	1.354
11	4	7	1.739	0.050	1.789
12	4	8	1.739	0.057	1.796
13	5	8	2.174	0.057	2.231
14	6	8	2.609	0.057	2.666
15	7	8	3.043	0.057	3.101
16	8	8	3.478	0.057	3.535
17	9	8	3.913	0.057	3.970
18	10	8	4.348	0.057	4.405
19	11	8	4.783	0.057	4.840
20	12	8	5.217	0.057	5.274
21	13	8	5.652	0.057	5.709
22	14	8	6.087	0.057	6.144

With insulation screed lambda: 0.041 W/mK

Floor construction height (cm)	EPS screed height (cm)	Screed height (cm)	Rd value EPS screed	Rd value Chape	Total RD value
9	4	5	0.976	0.036	1.011
10	4	6	0.976	0.043	1.018
11	5	6	1.220	0.043	1.262
12	5	7	1.220	0.050	1.270
13	6	7	1.463	0.050	1.513
14	7	7	1.707	0.050	1.757
15	8	7	1.951	0.050	2.001
16	9	7	2.195	0.050	2.245
17	10	7	2.439	0.050	2.489
18	11	7	2.683	0.050	2.733
19	12	7	2.927	0.050	2.977
20	13	7	3.171	0.050	3.221
21	14	7	3.415	0.050	3.465
22	15	7	3.659	0.050	3.709

With insulation screed lambda: 0.041 W/mK

With insulation boards lambda: 0.022 W/mK

Floor construction height (cm)	EPS screed height (cm)	PUR plate height (cm)	Screed height (cm)	Rd value EPS screed	Rd value PUR plate	Rd value Chape	Total RD value
13	5	2	6	1.219	0.909	0.043	2.171
14	5	2	7	1.219	0.909	0.050	2.180
15	5	3	7	1.219	1.364	0.050	2.633
16	5	3	8	1.219	1.364	0.057	3.064
17	5	4	8	1.219	1.818	0.057	3.094
18	6	4	8	1.463	1.818	0.057	3.338
19	6	5	8	1.463	2.273	0.057	3.793
20	6	6	8	1.463	2.727	0.057	4.248
21	6	7	8	1.463	3.182	0.057	4.702
22	6	8	8	1.463	3.636	0.057	5.156

New EPS beads lambda: 0.032 W/mK

Recycled cork granules lambda: 0.049 W/mK

Sprayed pur lambda: 0.023 W/mK

Insulation screed lambda: 0.041 W/mK

Insulation boards lambda: 0.022 W/mK

Floor construction height (cm)	Rd value CircoFloor+eps beads+osb	Rd value CircoFloor+cork granules+osb	Rd value Sprayed PUR+screed	Rd value Insulation screed + screed	Rd value Insulation screed+Pur plates+screed
9	/	/	1.347	1.011	/
10	/	/	1.354	1.018	/
11	2.468	1.893	1.789	1.262	/
12	2.794	2.116	1.796	1.270	/
13	3.121	2.339	2.231	1.513	2.171
14	3.449	2.563	2.666	1.757	2.179
15	3.777	2.786	3.101	2.001	2.633
16	4.106	3.009	3.535	2.245	2.640
17	4.434	3.233	3.970	2.489	3.095
18	4.762	3.456	4.405	2.733	3.339
19	5.090	3.680	4.840	2.977	3.793
20	5.418	3.903	5.275	3.221	4.248
21	5.746	4.126	5.709	3.465	4.702
22	6.074	4.350	6.144	3.709	5.157

Why CircoFloor is your best choice

Our CircoFloor system with high-quality EPS beads delivers an Rd-value of 2.47 m²K/W from just 11 cm — significantly higher than traditional alternatives.

With a 15 cm construction, the Rd value increases to 3.78 m²K/W, and with the maximum thickness of 22 cm even to 6.07 m²K/W — almost the highest result in our comparison.

Thanks to its low lambda value of only 0.032 W/mK, CircoFloor combines optimum thermal performance with light weight and ease of installation, without compromising on moisture resistance.

Choose CircoFloor and benefit from maximum energy savings, a sustainable and recyclable solution with a long lifespan for your floor insulation.

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