Decking screw stainless steel A2

Waterlogging is a particular threat to wooden substructures, which are almost permanently in the shade and cannot dry out as quickly as the decking boards. A more insensitive substructure consists of aluminum hollow profiles, here SPAX has a clever screw solution for the combination with wooden decking boards in the portfolio - the SPAX Alu decking screw. Like our conventional decking screw, it also has a two-part thread, but the lower, fine thread is for aluminum instead of wood. The fixing thread below the head, which holds the plank creak-free on the substructure, remains the same. In addition, there is the drill point, which it needs to be able to be screwed into aluminum profiles with a wall thickness of up to 4.0 mm without pre-drilling. The thickness of the profiles should depend on the type of wood you have chosen. Our recommendation: Choose an aluminum substructure with 3.0 mm wall thickness for softwood and an aluminum substructure with 4.0 mm for hardwood. It is important to pre-drill the wooden deck boards, preferably with the matching SPAX drill 5.2 mm. The aluminum substructure is not pre-drilled. We do not recommend the use of the aluminum profiles for woods with strong alternate growth such as Cumar�, Massaranduba, IPE planks whose dimensions exceed 21 x 120 mm. With the aluminum-wood combination, very low installation heights of the overall construction of only 46 mm are possible, for example for terrace coverings on balconies and flat roofs. For you, this means: no more worries about waterlogging under the wooden deck, no more time-consuming gluing of the substructure timbers. Due to the combined thread of the decking screw Alu you save a lot of time during installation, you do not have to pre-drill the aluminum profiles.