High Quality UV Resistant 60mil Thick TPO Rubber Roof Waterproof Membrane For Metal Concrete Wood Terrace Roof

EPDM waterproof membrane is made from ethylene propylene diene monomer (EPDM), adding into some chemical auxiliaries, for example,carbon black, nanophase modifier, plasticizer, vulcanization accelerator and others, it is one kind of polymer waterproof membrane with excellent performance elasticity.

Waterproof membrane thickness selection

Key factors affecting thickness selection

1. Waterproof ability and durability

• Thickness determines the ability of the roll to resist water pressure and puncture. For example: 1.5mm roll is suitable for conventional roofs, while underground projects require ≥2.0mm to resist soil side pressure.
• Thicker rolls (≥3.0mm) are more resistant to aging, but too thick may cause self-weight sliding or hollowing.

2. Environmental adaptability

• Temperature influence: High temperature areas (such as South China) need to choose high temperature resistant APP modified asphalt roll (softening point 160℃), low temperature areas (such as Northeast China) need SBS elastomer modified roll (resistant to -25℃).
• Environmental coefficient formula
• Open roof: +0.3mm
• Basement: +0.5mm
• Planted roof: +0.8mm (resistance to root puncture).

Thickness standards of different materials

1. PVC waterproofing membrane

• Conventional thickness: 1.5mm (minimum value 1.35mm, average value ≥1.5mm).
• Allowable error: ±0.3mm (such as 3.7mm~4.3mm).

2. TPO waterproofing membrane

• Common thickness: 1.2mm, 1.5mm, 2.0mm, customizable.

3. SBS/APP modified asphalt membrane

• Conventional thickness: 3mm, 4mm, 5mm, polyester base is better than composite base.

4. Self-adhesive membrane

• Recommended thickness: above 2.0mm, ensure that the base layer is flat to avoid hollowing.

Scenario-based recommended thickness

1. Roofing project

• Cold areas: SBS modified asphalt roll (3mm~4mm).
• Hot areas: APP modified asphalt roll (3mm~4mm) or TPO roll (1.5mm~2.0mm).

2. Underground project

• Self-adhesive roll (2.0mm~3.0mm) or PVC roll (1.5mm~2.0mm).

3. Green roof

• ≥2.0mm, and add a root puncture resistance layer (such as EPDM roll).

Quality identification and construction points

1. Quality inspection

• Check the base (polyester felt is better than composite felt) and the uniformity of cross-section impregnation.
• Check the test report (such as GB 18242 standard).

2. Construction adaptation

• Temperature control
• Modified asphalt roll: The best construction temperature is 10~25℃, and the roll is preheated to 50~60℃ at low temperature.
• Self-adhesive roll: Construction at 5℃~40℃, the activity of the adhesive layer changes significantly with temperature.
• Overlap treatment: Thick rolls need to accurately control the melting depth to avoid step effects.

3. Environmental protection and standards

• Avoid using composite tires and recycled materials (listed as restricted).