Liquid Waterproofing: Perfect for Many Applications Including Car Parks

SOPREMA installs ALSAN all over the world in extremes of cold and hot climatic conditions. Our liquid waterproofing range is known for its fast curing times, limitless aesthetic finishes and flame-free application – product characteristics that make it perfectly suited for waterproofing flat roofs, balconies, details and upstands A liquid ALSAN balcony system was used in the extensive refurbishment on the New Priory project. ALSAN liquid waterproofing is also an ideal solution for both new builds and car park refurbishments using ALSAN PMMA.

Liquid waterproofing: advantages

Our liquid waterproofing range is easy to apply. It is typically roller applied to ensure an even coat but can be spray-applied to speed up the process. Using the correct primer, ALSAN is suitable for virtually any substrate. The range is compatible with SOPREMA bituminous membranes, and both come with a single-point warranty. Other product advantages include:

  • watertightness, preventing moisture from passing into the structure.
  • adhesion, resisting the effects of wind suction.
  • resistance to mechanical damage: Correctly installed, ALSAN liquid waterproofing is impervious to traffic loads and the effects of thermal and other minor movements.
  • durability: under normal service conditions, the system has a service life of at least ten years.

Rooftop car parks or lower decks

It is important to point out the difference between car parks and rooftop car parks. The latter generally call for a complete waterproofing system, while the former do not usually require a waterproofing layer of their own, as they benefit from the rooftop waterproofing. For rooftop car parks, ALSAN 770, ALSAN 870 RS, quartz sand and a finish coat can be used. For intermediate levels, ALSAN 971 F as a wearing layer, or a primer with ALSAN 870 RS and a finish layer, suffices.

Minimising downtime during refurbishments

Minor repairs can be carried out quickly and effectively with minimal disruption thanks to ALSAN, making it perfectly suited for the refurbishment of car parks that must remain open while work is carried out. Our liquid waterproofing solution is not only quick to apply and guarantees rapid curing; it can also be applied

  • section per section, so that certain car park areas can continue to be used
  • on top of old asphalt layers, which makes for less downtime as no new asphalt layers are needed. It can be advisable to carry out a structural concrete survey before the waterproofing is applied, in order to identify any defaults requiring remedial works. We can provide this survey, as well as other roofing conditioning surveys as required.

Car parks refurbished with ALSAN can usually reopen to full capacity only an hour after the liquid waterproofing system has been completely installed. In Germany, a car park ramp was completely waterproofed in under six hours (watch the video).

Finishes

ALSAN liquid waterproofing comes in a wide range of RAL colours in various finishes. Markings, such as the designation of parking bays, disabled bays, arrows, exits and fire exits can be easily carried out with ALSAN PMMA. ALSAN provides a long-lasting solution that requires minimal maintenance, and is slip resistant – crucial for car park flooring. ALSAN 870 RS provides a non-slip surface and meets a PTV value of 55+, ensuring safety even under wet conditions. To provide sufficient grip on car park ramps, ALSAN 971 F is essential.

The versatility of liquid waterproofing

ALSAN PMMA is ideal for waterproofing structures that provide vehicular access roadways. To find out more about ALSAN’s various applications, contact us for more information.