4.Versatility of HPL
In addition to the great durability, especially of HPL-Compact, the extraordinary design options with screen and digital printing should be a main factor in convincing more and more architects to use HPL for façade design. In recent years, an increasing number of attractive HPL façades have appeared all over the world, underlining what has become possible with HPL. In addition to this, HPL offers protection against UV radiation, extreme temperatures, moisture and mechanical stress, while allowing individual façade design with large format patterns and photographs.
As mentioned already, self-supporting HPL-Compact has proven to be particularly durable in outdoor use. The structure of HPL gives it a high modulus of elasticity and high impact and bending strength, and excellent longterm durability with regard to these properties. It is resistant to rain, moisture and water. Permanent water emersion must be avoided, though.
HPL is not sensitive to temperature shock, it is resistant to frost and does not alter its properties even at low temperatures. The dimensional change due to temperature and humidity in the range from -20 °C to +80 °C and 10 – 90 % relative humidity is about 0.4 %. As a non-metal material, it does not corrode. The influence of exhaust emissions or acid rain, or salty atmospheres does not affect HPL.
Façades and balcony panels are subject to building regulations and in many countries also require building inspection approval. As a rule, the respective building authorities are obligated to grant approvals only after test procedures have been completed. Requirements in approvals must be strictly adhered to.
As mentioned earlier, self-supporting HPL Compact panels in particular have proven to be exceptionally durable in outdoor applications. Due to its structure, HPL has a high modulus of elasticity, high impact and flexural strength, and, as a result of these properties, excellent resistance to aging. It is resistant to rain, moisture, and wet conditions. However, prolonged exposure to standing water must be avoided.
HPL is insensitive to temperature shocks, frost-resistant, and does not change its properties even at low temperatures. Its dimensional change due to temperature and humidity in the range of -20 °C to +80 °C and 10–90 percent relative humidity is approximately 0.4 percent. As a non-metallic material, it does not corrode. HPL is not affected by exhaust fumes, acid rain, or a salty atmosphere.
Facades and balcony cladding are subject to building code regulations and, in many countries, also require building code approvals. In principle, the respective building authorities are responsible for granting approvals following the completion of inspection procedures. Requirements specified in approvals must be strictly adhered to.
