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Roof Ventilation Microporous PP Ridge Film

Microporous polypropylene film for roof ridge vents allowing attic moisture escape. HTS 3921.19.0010 classification for cellular microporous PP sheets in construction.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China6.5%+35.0%41.5%
🇲🇽Mexico6.5%+10.0%16.5%
🇨🇦Canada6.5%+10.0%16.5%
🇩🇪Germany6.5%+10.0%16.5%
🇯🇵Japan6.5%+10.0%16.5%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

3925.90.00.00Lower: 40.3% vs 41.5%

If metal roof vents with plastic coating

Metal reservoirs/obtains with plastic functional components.

3920.99Lower: 15.8% vs 41.5%

If non-porous plastic roofing membranes

Impermeable plastic sheets for roofing classified non-cellular.

7308.90Lower: 10% vs 41.5%

If steel ridge vent structures

Iron/steel structures predominate for fabricated roof vents.

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Import Tips & Compliance

• ASTM E2178-13 net free area testing validates ventilation performance

• Rolls for field fabrication remain plastic film; preformed vents become 3925.90

• UV stabilizer content disclosure for 20+ year warranties

Related Products under HTS 3921.19.00.10

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