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Prefabricated external wall element

Prefabricated external wall element

Our highly prefabricated element system for exterior walls speeds up on-site construction.

The prefabricated elements include an energy-efficient Termo stud frame and an insulation core, both made of non-combustible material.

External cladding element can be anything from metal through wood, glass to natural stone, brick or ceramic tiles. Flexibility in the number and size or shape of windows and doors, coupled with several cladding alternatives gives almost unlimited options for a façade appealing appearance.

CE marking: According EN 13830

Applications:

External walls in office and commercial buildings
External walls in public and industrial buildings
External walls in residential buildings

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References

Technopolis Vantaa
DHL business park
FAPMD office building

Element types

Square element:	max. 3600 x 10500 mm²
Strip element:	max. 600 x 10500 mm²
Horizontal frame element:	max. 3600 x 10500 mm²

Commercial buildings:
Square element system	Strip element system

Block of flats:

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Element structure

1. External facade options

Steel or other metals
Wood
Glass
Natural stone, brick or clay tile
Ventilated thin rendering
Insulated rendering
Ceramic tiles

2. Ventilation channel 20 mm

Purlins, e.g. Support stud CA1SS

3. Windshield Board Options

Gypsum sheathing board, 9 mm
Porous wood fibre sheathing board, e.g. 12 mm or 25 mm
Plywood, e.g. 6,5 mm or 9 mm
Bitulite, e.g. 12 mm
Cement bonded particle board, 4 mm or 8 mm.

4. Thermal insulation/termo stud

Thermal insulation is non-combustible
Design thermal conductivity λ Design = 0.034/0.035 W/m²K
Windshield board panel joints are sealed and both sides of the insulation are in contact with insulated surfaces
Termo stud material S 350GD+Z
LPAT-U, U-shaped termo stud
LPAT-C, C-shaped termo stud
LPAT-UW, U-shaped termo stud with wide flanges

5. Vapour barrier

LDPE polyethylene 0,2 mm, SFS 4225, E class UV protected
Water vapour permeability value Wp = 0,002*10-9 kg/(m²sPa)
Water vapour diffusion resistance Zp = 500*109 m²sPa/kg

6. Internal Lining Options

Hardened gypsum board, 13 mm (EK13)
Thin steel sheet 0,6–1,0 mm + hardened gypsum board 13 mm
Wood-gypsum board, e.g. 10 mm or 12 mm
Chipboard, e.g. 10 mm, 11 mm or 12 mm
Plywood, e.g. 9 mm or 12 mm
Semi-hard wood fibre board, e.g. 9 mm
Thin steel sheet 1,5 mm

U-values

Wall element U-values 8 row perforation

Width of thermal stud (mm)	Thickness of steel (mm)	Perforation	Insulation (W/mK)	U-value (W/m²K)
175	1.0	8-rows	0.035	0.22
175	1.2	8-rows	0.035	0.23
175	1.5	8-rows	0.035	0.23
175	2.0	8-rows	0.035	0.24
200	1.0	8-rows	0.035	0.20
200	1.2	8-rows	0.035	0.21
200	1.5	8-rows	0.035	0.21
200	2.0	8-rows	0.035	0.22

Wall element U-values 10 row perforation, insulation (W/mK) 0.034 Rockwool fire EI60

Width of thermal stud (mm)	Thickness of purlins (mm)	Perforation	Insulation (W/mK)¹⁾	U-value (W/m²K)
225	1.0	10-rows	0.034	0.18
225	1.2	10-rows	0.034	0.18
225	1.5	10-rows	0.034	0.19
225	2.0	10-rows	0.034	0.19
250	1.0	10-rows	0.034	0.17
250	1.2	10-rows	0.034	0.17
250	1.5	10-rows	0.034	0.17
250	2.0	10-rows	0.034	0.18
275	1.2	10-rows	0.034	0.16
275	1.5	10-rows	0.034	0.17
275	2.0	10-rows	0.034	0.17

Wall element U-values 10 row perforation, insulation (W/mK) 0.033 Glasswool fire EI-

Width of thermal stud (mm)	Thickness of purlins (mm)	Perforation	Insulation (W/mK)¹⁾	U-value (W/m²K)
225	1.0	10-rows	0.033	0.17
225	1.2	10-rows	0.033	0.18
225	1.5	10-rows	0.033	0.18
225	2.0	10-rows	0.033	0.19
250	1.0	10-rows	0.033	0.16
250	1.2	10-rows	0.033	0.17
250	1.5	10-rows	0.033	0.17
250	2.0	10-rows	0.033	0.18
275	1.2	10-rows	0.033	0.16
275	1.5	10-rows	0.033	0.16
275	2.0	10-rows	0.033	0.17

U-values by standard ISO EN 6946:2007 and EN 10211:2007.

Sound insulation

Test standard:	EN ISO 140-3:1995
Classification standard:	EN ISO 717-1:1996

Structures from inside outwards:	Rw (dB)	C_tr,100-3150 (dB)	R_A,tr(=Rw+C_tr) (dB)
Stud depth 225 mm:
EK13+LPT-C225+TS9	54	-7	47
Stud depth 175 mm:
EK13+LPT-C175+TS9	51	-9	42
EK13+0,6 thin steel sheet+LPT-C175+TS9	54	-9	45
EK13+LPT-C175+TS9+purlins+corrugated sheet	50	-7	43
2xEK13+LPT-C175+TS9+purlins+corrugated sheet	51	-6	45
EK13+LPT-C175+TS9+vertical purlins+horizontal cladding	49	-6	43
EK13+LPT-C175+TS9+purlins/additional insulation+corrugated sheet	52	-9	43
EK13+LPT-C175+TS9 thermal insulation+50mm+8mm rendering	54	-7	47
EK13+LPT-C175+TS9+30mm ventilation cavity+tile cladding 85 mm	61	-5	56
EK13+LPT-C175+TS9+horizontal purlins 20mm+Aquapanel 12.5 +8mm rendering*	51	-10	41
EK13+LPT-C175+TS9+horizontal purlins 45mm+Aquapanel 12.5 +8mm rendering*	55	-11	44
Stud depth 125 mm:
EK13 +LPT-C125+TS9	50	-8	42

*Calculated value

Rw (dB): Airborne sound insulation value
R_A,tr(=RW+Ctr) (dB): Traffic noise sound insulation value

Fire resistance

Test standard:	EN 1363-1, EN 1365-1
Classification standard:	EN 135 01-2

Facade structures from inside outwards:	Fire class
EK13+LPT-C175+TS9	EI 60

In load bearing wall situations structures can also meet REI30 and REI60 in accordance with separate instructions.
R = resistance, E = integrity, I = insulation
In fire structures, rockwool should be used as thermal insulation, e.g. Paroc eXtra.

Order & delivery

Market area: Finland, Sweden, Estonia and the United Kingdom.

Ruukki designs and delivers prefabricated wall elements based on customer's specifications for the project. Depending on customer needs, our delivery includes façade component or total façade delivery with installation.