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Atactic Polypropylene is referred to as APP. APP membrane is the most popular waterproofing material for concrete roofs and low-slope roofs. With the use of a torch, the APP membrane is put.
APP waterproofing membrane can prevent water intrusion in man-made ponds, restrooms, water tanks, curtain walls, and concrete channels. APP membrane is a reliable waterproofing material that contractors frequently use to protect surfaces from leaks.
There is a much higher probability of a leak on terraces and rooftops because of the direct exposure to rain. Water penetration is effectively prevented by using APP waterproofing membrane.
Advantage of the APP membrane
- High tensile strength is a characteristic of APP membranes.
- Since APP membranes are completely impermeable, there is no danger of leakage following application to the desired surface.
- These are weather-resistant. A must-have quality for a waterproofing material is durability and resistance to shifting environmental conditions, which APP membranes unquestionably possess.
- Isotropic characteristics exist in APP membranes. The materials in the membrane have isotropic qualities, which means that they won’t alter their characteristics in response to a change in direction.
- Along with offering exceptional bond ability, the APP membrane’s seam integrity is a crucial component.
- These membranes offer dimensional stability at elevated temperatures and flexibility at low temperatures.
- Application of APP membranes is simpler in hot-melt environments.
The disadvantage of APP Membranes
- Because of their inferior weathering capabilities, torch-on membranes have a very short useful life.
- Due to weather fluctuations, they frequently break and leak. They might melt or become looser in the summer and get more complicated in the winter, which could result in delamination and fissures.
- Furthermore, because it calls for the use of gas, flames, priming, etc., the installation of such membranes is exceedingly laborious and dangerous.
- In regions where these torch-on-based membranes are applied, no water ponding or buildup is permitted. Asphalt, an oil-based substance, breaks down whenever there is a buildup of water.
- Most torch-on membranes only last between three and five years before they need to be changed, which adds to the cost.
About EPDM Membrane
Ethylene propylene diene terpolymer, or EPDM, is a synthetic rubber roofing membrane that is incredibly resilient and is frequently used on low-slope structures. Ethylene and propylene, its two main components, are obtained from oil and natural gas.
Advantages of the EPDM Membrane
The EPDM roofing system can be installed mechanically, completely adhered, or ballasted, with the roofing system seams sealed with liquid adhesives or specially developed tape.
The EPDM Membrane is resistant to aging brought on by heat, sunshine, and ozone. It possesses high toughness and gas impermeability, is bendable at low temperatures.
EPDM provides good low-temperature capabilities, with elastic qualities down to -40 °C.
The disadvantage of EPDM membrane
In hot weather, EPDM roofing is susceptible to damage. If the rubber membrane is subjected to intense heat for an extended length of time, it may shrink, strain, or break.
Ponding water can harm EPDM roofing over time and can be a problem. If the membrane is not put correctly or the seams are not adequately taped, water can build up and begin to damage or mold the surface of the roof. To avoid water leaks and damage, it’s crucial to make sure the roof is properly slanted and that all seams are sealed.
Sharp things like branches and hail can cause punctures and rips in EPDM roofing. The membrane is quickly damaged by falling debris and does not withstand impacts properly.
A single-ply reflective roofing membrane is made of TPO or thermoplastic polyolefin. The substance we refer to as TPO is made up of polypropylene and ethylene-propylene rubber that have been polymerized together.
- This synthetic roofing membrane is available in a range of thicknesses and sizes.
- A strong, permeable, flexible membrane serves as a barrier, allowing water to flow off the roof.
- It prevents direct leaks as well as capillary effects through water percolation, essentially rain-coating the roof. It is non-porous with good weathering qualities.
- The system becomes monolithic when seaming joints that have been heat-fused overlap fasteners, eliminating any worries about leaks via the fasteners.
The Disadvantage of TPO membranes
- A TPO roof’s highest layer is laminated. Any material that has lamination on it already has weak areas that over time cause shrinkage, cracking, and overall degradation.
- Surface cracks are known to appear fast on less expensive TPO roofs.
- The membranes go through contractions and expansions, and the seams are frequently places where they get loosened, causing water leaks in the roof.
Difference between FPO and TPO Membrane
- The initials of the phrase “thermoplastic olefins” make up the English name TPO. The initials of the phrase “flexible polyolefin” make up the Germanic term FPO, which has the same meaning.
- There are no chemical or mechanical differences between TPO and FPO; they are identical goods.
- TPO and FPO products contain polyethylene, polypropylene, and polyurethane components in their chemical makeup.
SBS is an elastomeric modified bitumen (SBS) waterproofing membrane having a high softening point, superior flexibility and elasticity, and great adherence to the substrate.
The full form of the SBS membrane is
Advantages of the SBS Membrane
- Excellent performance at both low and high temperatures and a high softening point.
- Wide temperature range of applications (summer or winter).
- A high degree of flexibility and mastic bonding.
- excellent aging and durability.
- elasticity at –15 °C.
- excellent adhesion to the substrate.
The disadvantage of the SBS Membranes
- Less resistant to the sun and UV radiation
High-density polyethylene (HDPE) membranes protect water-excluding buildings from water and water vapor while also protecting the concrete from corrosion caused by chemicals and corrosive earth salts.