After 28 years, RENOLIT ALKORPLAN F still provides high-performance coverage for the production site and warehouse area of the Dutch company Manutan, which specializes in industrial and commercial office equipment and supplies. This is demonstrated by the result of a recent technical assessment, requested by the same company, to evaluate whether the installation of a photovoltaic system was possible.
It was April 1992 when this waterproof covering was installed on the roof of the building, on a base in corrugated metal sheet and mineral wool. It is one of RENOLIT ALKORPLAN F first applications with a white surface layer, a flexible PVC thermoplastic membrane reinforced with polyester mesh.
Compliant with UEAtc guidelines (the European network issuing technical approvals for innovative construction products or systems), this product provides a waterproofing solution thanks to mechanical fixing systems on metal, wood, concrete and other materials.
To date, the same covering is in perfect conditions and this is demonstrated by the audit carried out last year, which thoroughly analyzed and tested the quality of the covering. The feedback was absolutely positive and highlighted how the characteristics of RENOLIT products have remained unaltered over time, pointing to their durability and performance.
The results were actually much better than the current minimum requirements. The actual thickness has been 1.14 mm over the years and the surface has no particular aesthetic flaws, such as cracks, scratches, voids or holes. Flexibility at low temperatures is first-rate: RENOLIT ALKORPLAN F is still able to withstand -35 °C, an excellent result for a 28-year-old covering. It was also a result of the white surface layer which absorbs less heatless subject to heat, and reacts better to extreme hot-cold cycles, thus slowing down the aging process of the membrane.
PVC membranes have been used for waterproofing roofs since the 1960s with great success. In reality, this material is the most requested in Europe, accounting for about 18% of the market and almost four times exceeding the demand for new synthetic materials. Given the experience gained over the years, the degree of reliability of the product with respect to its durability is outstanding.
With regard to Manutan, RENOLIT ALKORPLAN F has completed its 28th year of life in excellent condition, therefore the membrane is expected to last up to 40 years, as confirmed by the BBA Certification. The British Board of Agrément (BBA) is the only European body to carry out technical assessments of waterproofing regarding their durability.
On the ground of real-case verifications on site as well as material aging tests, the BBA can certify the minimum resistance of a membrane according to its intended use. To this extent, it is easy to establish how RENOLIT ALKORPLAN F in PVC may be given a life cycle between 35 and 40 years.
A project that 28 years later confirms the reliability of RENOLIT ALKORPLAN roofing products, as well as a regular tendency towards innovation in the use of PVC, developing safe and long-lasting products, meeting the concrete needs of professionals who take on an everyday challenge on the site.
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