Some people complain that their polycarbonate conservatory roofs can make sudden creaking or cracking sounds. Polycarbonate roofing sheets will expand and contract with extreme temperature changes. However, there are a number of things you can do to minimise this.
- Ensure there had been some space allowed between the sheets and glazing bar/fixings for thermal expansion, 3-5mm per M is usually enough.
- Ensure the glazing bars are not applied too tightly, as this can inhibit sideways movement. Instead of moving gradually with the changes in temperature, the sheet will bind and then move with a jerk, causing creaking that sounds disproportionately loud inside the structure. It may also rub the gasket of the aluminium structure.
- Ensure the glazing bar gasket is in the correct place under the sheet. If it is displaced, the polycarbonate may rub against the aluminium, causing noise.
