In the most common case, Metadeck is installed perpendicular to the building façade and the area to be sealed is between the façade and the end of the profiles. This re-sealing must be carried out with great care to avoid drips along the façade. The solutions described below are also applicable in situations where there is a wall along the Metadeck: i.e. not just at the end, but also along the length.

The solution to be implemented may depend on the nature of the façade (rendering, stapled stone, rubble stone, millstone, wood cladding, etc.) and its condition (damaged, crumbly stone, etc.) and must therefore be studied specifically.

Here are two sealing systems with MetaDeck

We recommend two systems that can be used. You can choose one of the two, or better still, for safety's sake, both together.

Putty The special shape of the profile requires the use of a suitable sealant. We achieved very convincing, long-lasting results with Illbruck's SP925 sealant. SP925 is a thixotropic membrane that cures by absorbing moisture from the air to form a solid, elastic, airtight and waterproof coating with good resistance to UV rays and ageing. SP925 has very high elasticity, ideal for absorbing the movement of structural elements and the expansion of materials. Thixotropic means that the product can be extruded with a spray gun and then applied with a spatula or brush (or even sprayed with a spray gun). It may be useful to apply Illbruck AT120 primer to the substrate and Metadeck beforehand. Caution: SP925 filler may run. The product is very staining. Install an adhesive strip to prevent the mastic from running.

Bib flashing A bib flashing fixed to the wall in accordance with the rules of the trade (jointing, embossing, etc.) is also a solution of choice to ensure a watertight seal between the wall and the profiles. The flashing will cover the first 5 or 10 centimetres of the profiles, allowing water to drain off towards the lower part of the profiles (which are installed on a slope), i.e. towards the gutter or downspout.

In certain situations, Metadeck is placed against parts of structures where it is not possible to create a waterproofing upstand.

In particular, we come across wooden or steel joists in the structure of the terrace, low masonry (acroteria), window sills etc...

In all these situations, the use of mastic is likely to be risky because of the large gaps to be filled, or the possible movements between parts of the structure.
The absence of an upstand prevents the use of flashings or equivalent systems.

We recommend using a bonnet:
- using EPDM membrane,
- or any type of aluminium or zinc bending. Zinc is compatible with aluminium: the galvanic couple is very weak.

The same type of solution is suggested for situations where Metadeck is installed on balconies forming an outgoing corner. In this case, the Metadeck profiles forming an angle (not necessarily a right angle, incidentally...) must be sealed together.

Another scenario: MetaDeck profiles to be connected on an external angle