If the edges of the deck which are not adjacent to a wall are closed, then sufficient ventilation grills must be added along the deck edge to enable the free flow of air under the deck. For example, if the deck is installed alongside a wall, ventilation grills must be installed along the whole length of the wall before the first row of deck boards. When using ProFi Alu Rail and/or Rubber Strip, it is mandatory to create additional ventilation in the deck to ensure a free flow of air underneath the deck. Please note local building regulations and generally accepted practices concerning for example, the minimum distance of the decking to the wall of the building, and the possible need for drainage channels between a house wall and the decking edge. 1–1,5 %) results in faster deck drying and the run-off rainwater will help to wash away dust.Īs with all decks, ProFi decks must be well ventilated and installed on a sub-structure that enables a free flow of air under the deck and good drainage of rainwater. However, installing the boards at a gradient (e.g. Gap size is reduced when 90° framing boards are used.Īs all ProFi deck products have a very low rate of moisture absorption, they can be installed horizontally with no incline. Gaps can be minimised by planning the deck board direction. by changing the board direction or using a framing board running at a 90° angle to the main area. Plan your deck so as to minimize the number of board-end joints / expansion gaps e.g. If you need a detailed expansion table, contact us for a copy of the Technical Data Sheet. Typical values are less than 0,5mm for Piazza Pro, approximately 1,5 mm for Piazza One & Deck 150 and up to 3 mm per m for Terra 127. It is also normal that the relaxation of residual production stress may result in a small shortening of the deck boards in the first years after installation. The deck boards will expand and contract slightly along their length with changes in temperature (typically 6 mm for a 4 m board during a 40☌elsius temperature change). In addition to offering superior low maintenance properties compared to timber, composite decking has other different properties. Please contact us for more detailed information concerning roof terrace, stair and pool edge installation. These installation instructions are for ProFi Piazza Pro, ProFi Piazza One, ProFi Deck 150, ProFi Deck 150 UV+, and ProFi Terra 127. The instructions should be seen as being in addition to and not a replacement of local and national building regulations which must always be followed. Failure to do so may lead to reduced product performance and will invalidate the manufacturer's guarantee. It is important to follow the instructions carefully. ProFi composite decking – manufacturer's fixing instructions