You will find on this page all our fixings and wall anchors for externally insulated façades, as well as calculations on structural strength of the fixings. You might want to read the additional information and insulated façades and the methods for installing a wire rope trellis on a façade of this kind.
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Ideally, the greenery is planned before the building is even built. The anchors for the trellis can then be built while the façade is being externally insulated. FassadenGrün has desigened the two fixings for this purpose:
Most often, the decision to have climbing plants grow on the façade is made after the building is built and the external insulation (ETICS) is installed and sealed. The fixings listed are designed to be installed on a finished façade.
XP 12XX7 for ETICS up to 18 cm
XP 12XX9 for ETICS up to 24 (30) cm
WM 12XX8 for ETICS up to 12 (14) cm
WM 12XX9 for ETICS up to 22 cm; easy installation
WM 12XX2 for ETICS up to 6 cm for light loads
WM 12XX4 for ETICS up to 12 cm for light / medium loads
WM 12XX6 for ETICS up to 16 cm on hard insulation
WH 08555 direct installation in the ETICS panels
As explained on the page "wire rope holders", the fixing bolts for a wire rope trellis are bearing heavier loads than fixings for a stiff metal or wood grid trellis. With thicker insulation panels it gets harder to have a solid enough wall holder. Three structural problems are described here.
The threaded bolt of all the holders and mounts from FassadenGrün goes all the way up to the cross-head where the wire rope is being fixed. The thicker the insulation panel in wich the bolt is mounted on, the more it will bend under the load of the wires and climbing plant until it buckles under the weight! The bolt is secured in the masonry under the insulation panels and not held by the insulation. With a 10 cm insulation and with a distance of 7 cm between the cables and the façade, the length of the cantilever is actually 17 cm!
By design our wire rope mounts are "cantilever" in the sense of engineering mechanics. The tensioned cables put loads of 250 kg or more (2.500 Newton) on the bolts, and with a wall distance of 10 cm the bending moment will be of 250 Nm (newton metres). This heavy bending load must be distributed in the wall without any deformation. This is difficult if the entry point is on the outer border of the insulation panel! The entry point has to be rigid.
A new problem arises by moving the bending point outward. The supporting bloc are pressed and screwed together so that tension is applied to the threaded shaft. The thinner a threaded bolt is, the more it will be elongated through this thension and from the load applied by the wire rope. The elongated shaft deforms and even wide wall mounts will deform and can't be fixed at their base.
To avoid elongation, the threaded shaft can be partially embedded in composite mortar. The thread is cast in a bloc of epoxy resin. Lateral stability is thus increased, the threaded shaft can't move or bend inside the insulation panel. This solution is used in the "XP" wall mount series and described further in the page on supporting cones as well as in the combination method.
The soluation favored by FassadenGrün is the use of supporting blocs. We use mainly blocs made of cellular glass that have a resistance of 1.600 Mpa, way more than the common PUR foam and its 500 Mpa or similar insulating foams. Even under high loads the cellular glass remains undeformed, as do the small treated hardwoord blocs that we use. Supporting blocs made of PUR foam or other inferior materials will deform in time and shouldn't be used.
Our wire rope mounts for ETICS facade come with cover plates in different sizes that will cover the bored outer plaster layer. A foam sealing ring is also included. Depeding on the size of the wall mount, the cover plate will cover the bore hole, seal the façade and may even distribute some of the load onto the supporting bloc inside the insulation.
Metals - such as the stainless steel we use - are conducive of heat; way more than masonry, wood or plastics are. A metal shaft emebedded deep into the masonry may conduct heat out of the heated inner rooms. The total lost energy is small, but it is possible that on the inner wall the temperature drops punctually from 1 to 3 degrees Celsius, wich can theoretically lead to wet spots if the ambient humidity is high. In the worst case, this can lead to mold. It is therefore necessary to prevent thermal bridges in the masonry.
All our wall anchors are sealed in the wall with composite mortar. The epoxy resin is not heat conducive and will prevent the loss of warmth.
Our thermal separator TT 12150 avoids any metal inside the masonry and all heat loss is prevented.