Polypropylene Breathable Felt

Manufacturers from China, Xiashi Jinbo Polypropylene Breathable Felt delivers high air tightness and vapor permeability, cutting HVAC energy use by up to 40%. It simplifies wall & roof construction to lower costs, suits steel structures, curtain walls and tile roofs, with wide temperature resistance, antibacterial performance and recyclability.

Product specification

Whats is Polypropylene Breathable Felt?

The Jinbo House Dress Polypropylene Breathable Felt is a novel spunbond polypropylene composite polymer-based building material with advanced waterproof and permeable properties. It utilizes molecular size differences to create microporous ventilation: liquid water droplets larger than 20 micrometers cannot penetrate, while water vapor smaller than 0.0004 micrometers can be effectively expelled. When applied to the exterior side of insulation layers, it provides comprehensive protection against wind, water, and moisture, earning the title of a building's "breathing protective coating."

Our Core Advantages

Outstanding Energy Saving & Thermal Insulation

This material boosts overall building air tightness, cutting heating and cooling energy use by as much as 40%. Built with a 3cm thick air interlayer that reaches a thermal resistance value of 0.307, it reliably blocks heat transfer for steady insulation all year round.

Waterproof, Moisture & Mold Barrier Performance

It boasts a moisture vapor transmission rate ≥1000 g/m² per 24 hours and water resistance up to 1000 mm within 2 hours. The structure draws trapped moisture out from wall cavities, stopping condensation buildup, mold formation and early insulation breakdown.

Lower Overall Construction Expense

Installing this product skips extra procedures like fine concrete covering and steam drainage setups. The streamlined construction workflow can slash your total project expenditure by 12% to 18%.

All-Weather Stability & Long Service Life

It keeps consistent functional performance across extreme temperatures from -40°C to 80°C. Even bent at -30°C, the material won’t crack. It passes 4-month UV aging testing, plus it’s anti-corrosion, B2 flame retardant, antibacterial, dust-mite resistant and fully recyclable after service life.

High versatility

Compatible with all types of building envelopes including steel plate walls, curtain walls, tile roofs, and vertical jointed roofs.

Common Issues and Their Causes

Condensation and mold growth inside walls/roofs

The membrane installation is reversed; the overlaps are not sealed; the damaged membrane material has not been repaired; and internal moisture cannot be discharged, resulting in retention within the structure.

Rainwater seeps into and moistens the insulation layer.Insufficient overlap width, inadequate sealing of openings, and use of low-quality membranes with substandard permeability.

The energy consumption for air conditioning heating has increased significantly.

When insulation gets damp, its thermal conductivity rises sharply. If you fail to pair it with a vapor-permeable membrane, the building envelope will lose air tightness. Hot and cold air circulates freely inside the wall cavity, which creates major heat loss.

There are several common leakage causes for damaged membrane: holes and punctures tear the material open; installers use insulation fixing nails without matching gaskets; rough sharp burrs on the base layer scratch the film, and no follow-up patch work is done to fix these damages.

Sealing failure also happens when the sealing tape separates and lifts away from the surface.

Other construction mistakes include leftover grease and dust left uncleaned on the base wall, skipping the required interface primer coat, and incorrectly applying indoor vapor barrier tape in exterior areas where breathable outdoor tape is needed instead.