Working with high quality sheet material also requires high quality fastening methods. Mounting Trespa® / HPL sheets can be achieved by using the matching HPL screws. What makes these screws so special is the fact that they match the exact RAL colour of each sheet in our range. These stainless-steel screws have a diameter of 4.8 millimetres and are 38 millimetres long. The round head has a wide, flat bearing surface which creates good downward pressure on the sheet without damaging or distorting the top layer. Make sure not to turn the screw more than a quarter turn once the bearing surface has reached the sheet. This will ensure enough pressure without causing damage to the top layer.
Characteristics of the HPL screws
The head of the screws have a strong and durable epoxy colour coating. This coating makes the screws corrosion resistant. The HPL screws are available in a large number of colours and in our online shop you will find the most common RAL colours. For each coloured HPL sheet that we stock, you will find a matching RAL colour screw in our assortment. Keep in mind that you don’t damage the anti-corrosion layer on the screws when handling it. We recommend using an undamaged, well fitted bit for fastening the screws. The HPL screws have a Torx T20 head and you can find the matching Torx T20 bit in our selection of accessories.
To ensure a strong screw connection, it is important to have a well-thought-out mounting plan. Based on this action plan you can decide where to drill the holes in the sheet. Remember to calculate in the weight and wind load of the sheet. Naturally, this is more pertinent for outdoor applications. In general, you can stick to 15 screws per square metre, with the screws evenly spread out. Drill the holes at least 20 mm from the edge of the sheet, but no further than 10 times the sheet thickness. So, for a 6 mm thick sheet, the holes cannot be further than 6 centimetres from the edge.
To start off, place one screw as a fixing point. This screw will be leading for properly positioning the sheet. This first screw will have a smaller hole than the rest of the screws, namely 5 mm. The other holes will be 8 mm wide to give the HPL sheet room to expand. This is also the reason why the screws cannot be turned too tightly.