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TRASPIR METAL

RAIN ON METAL ROOF SOUND: 3D MATS FOR METAL ROOFING TRASPIR METAL

The certified solution against heavy rain noise on sheet metal roofs and metal roofing

Heavy rain noise is one of the most difficult acoustic phenomena to control in metal roofing. Industrial buildings, canopies and buildings with sheet metal or steel roofing transmit impact sound directly to the structure, compromising the acoustic comfort of the spaces below.
TRASPIR METAL is the soundproofing 3D mat designed to reduce the sound of rain on a metal roof. Installed on a continuous substrate beneath the metal roofing, it promotes micro-ventilation of the roof, prevents corrosion of the metal roofing and extends the service life of the structure.

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Description
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Codes and dimensions
Technical Data
Composition
Product specifications
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Description

Composition and technical data of the TRASPIR METAL mat

TRASPIR METAL is a highly breathable membrane paired with a 3D mat and an upper protective felt layer. The 5-layer structure ensures continuous micro-ventilation and protection against impurities. The range is available in two versions: with a breathable waterproof membrane or with a drainage non-woven fabric.
Key technical features:
— Heavy rain noise reduction ΔLiA: approx. 4 dB (ISO 140-18)
— Improvement in sound reduction index ΔRw: 1 dB (ISO 10140-2/ISO 717-1)
— Impact sound reduction ΔLw: 15 dB (ASTM E492)
— Thickness: 8 mm · Mass per unit area: 600 g/m²
— Temperature resistance: -40/+80°C
— Certification: EN 13859-1 · Istituto Giordano

Does TRASPIR METAL also reduce the sound of rain on a metal roof on existing roofs?

Yes. TRASPIR METAL can be incorporated into both new builds and refurbishments involving the replacement of existing metal roofing, without structural modifications to the roof.
The mat is installed between the substrate and the new roofing. Installation is compatible with the main continuous and modular metal roofing systems, with fastening by stapler.

How much does TRASPIR METAL reduce heavy rain noise?

TRASPIR METAL reduces the sound level of heavy rain by approx. 4 dB ΔLiA (ISO 140-18), with values tested and certified by Istituto Giordano.
The measurement follows the ISO 140-18 standard on installed metal roofing systems (not in laboratory conditions), with data that can be replicated in professional applications.

How is TRASPIR METAL installed on metal roofing?

TRASPIR METAL is installed beneath the metal roofing, on a continuous substrate. The upper felt layer protects the mat during installation and makes it easier to walk on during construction.
It is fastened using a stapler. The 3D structure maintains its micro-ventilation function even after the roof has been completed, with temperature resistance from -40°C to +80°C.

TRASPIR 3D COAT TT

CODE	description	tape	H [m]	L [m]	A [m²]	H [ft]	L [ft]	A [sft]	pcs./pallet
TTTMET610	TRASPIR 3D COAT TT	TT	1.35	33	44.55	4' 5 1/8''	108	480	4

3D NET

CODE	description	tape	H [m]	L [m]	A [m²]	H [ft]	L [ft]	A [sft]	pcs./pallet
NET350	NET 350	-	1.25	50	62.5	4' 1 1/4''	164	673	4

Technical Data TRASPIR 3D COAT TT

Property	Standard	Tested Values	USC Conversion
Mass per unit area	EN 1849-2	600 g/m²	1.97 oz/ft²
Thickness	EN 1849-2	8 mm	315 mil
Water vapour transmission (Sd)	EN 1931	0,025 m	139.86 US perm
Tensile strength MD/CD	EN 12311-1	300 / 225 N/50mm	34 / 26 lbf/in
Elongation MD/CD	EN 12311-1	> 35 / 50 %	-
Resistance to nail tearing MD/CD	EN 12310-1	175 / 150 N	39 / 34 lbf
Watertightness	EN 1928	class W1	-
Resistance to temperature	-	-40 / 80 °C	-40 / 176 °F
Reaction to fire	EN 13501-1	class E	-
Resistance to penetration of air	EN 12114	< 0,02 m³/(m²·h·50Pa)	< 0.001 cfm/ft² at 50Pa
Thermal conductivity (λ)	-	0,3 W/(m·K)	0.17 BTU/(h·ft·°F)
Specific heat	-	1800 J/(kg·K)	-
Density	-	ca. 75 kg/m³	-
Water vapour resistance factor (μ)	-	ca. 33	-
UV stability ^{(1 )}	-	336h (3 months)	-
Water column	ISO 811	> 250 cm	> 98 in
Watertightness after artificial ageing	EN 1297 / EN 1928	class W1	-
After artificial ageing - Tensile strength MD/CD	EN 1297 / EN 12311-1	285 / 185 N/50mm	33 / 21 lb/in
After artificial ageing - elongation	EN 1297 / EN 12311-1	35 / 30 %	-
Flexibility at low temperatures	EN 1109	-40 °C	-40 °F
Void ratio	-	95 %	-
Attenuation of the sound reduction index ΔRw	ISO 10140-2 / ISO 717-1	1 dB	-
Attenuation in overall A-weighted sound intensity level from heavy rain noise ΔLiA	ISO 140-18	ca. 4 dB	-
VOC	-	not relevant	-
Impact sound pressure level attenuation ΔLw ^{(2 )}	ASTM E492	15 dB	-

1.

2. Laboratory measurement on 175 mm CLT floor structure with 38 mm self-levelling screed.

Technical Data 3D NET

Property	Standard	Tested Values	USC Conversion
Mass per unit area	EN 1849-2	350 g/m²	1.15 oz/ft²
Thickness	EN 1849-2	7,5 mm	295 mil
Maximum tensile force MD/CD NET	EN 12311-1	1,3 / 0,5 N/50mm	0 / 0 lb/in
Elongation MD/CD NET	EN 12311-1	95 / 65 %	-
Resistance to temperature	-	-40 / 80 °C	-40 / 176 °F
Reaction to fire	EN 13501-1	class F	-
Thermal conductivity (λ)	-	0,3 W/(m·K)	0.17 BTU/(h·ft·°F)
Specific heat	-	1800 J/(kg·K)	-
Density	-	ca. 45 kg/m³	-
UV stability ^{(1 )}	-	336h (3 months)	-
Void ratio	-	95 %	-
Attenuation of the sound reduction index ΔRw	ISO 10140-2 / ISO 717-1	1 dB	-
Attenuation in overall A-weighted sound intensity level from heavy rain noise ΔLiA	ISO 140-18	4 dB	-
VOC	-	not relevant	-

1.

Composition TRASPIR 3D COAT TT

protection layer	non-woven PP fabric
3D grid	3-dimensional PP mat
TOP LAYER	non-woven PP fabric
middle layer	PP breathable film
BOTTOM LAYER	non-woven PP fabric

Composition 3D NET

3D grid	3-dimensional PP mat

Product specifications

TRASPIR 3D COAT TT

Supply and installation of three-dimensional mat for metal roofing, Type TRASPIR 3D COAT TT.

Composition

From top layer to bottom layer:

3-dimensional PP mat
non-woven PP fabric
PP breathable film
non-woven PP fabric

Properties

Mass per unit area [g/m²]: 600
Thickness [mm]: 8
Water vapour transmission Sd [m]: 0.025
Tensile strength MD/CD [N/50 mm]: 300/220
Elongation MD/CD [%]: > 35/50%
Resistance to nail tearing MD/CD [N]: 150/175
Watertightness: class W1
Thermal resistance [C°]: -40/80

-Reaction to fire: class E

Density ρ [kg/m^3]: 75
Water vapour resistance factor μ: 33
VOC content: < 0.02%
Exposure to weather: 2 weeks
Watertightness after artificial ageing: W1 class
Tensile strength MD/CD after artificial ageing [N/50mm]: > 240/155
Elongation after artificial ageing: > 30/40%

Description

Highly breathable membrane paired with a 3D mat and protective felt. The upper felt layer prevents impurities from entering the mat and improves resistance to treading, while promoting micro-ventilation beneath metal roofing systems and preventing water stagnation underneath, thus reducing the risk of corrosion.

Installation

The application surface must be dry, free of dust and grease. Surface elements must be removed so that the membrane is not damaged during application. Further details regarding installation can be found in the specific instructions provided by the supplier.