Following the Energy Saving Directive (EnEV), the load-bearing outside walls both of new and older buildings are today often clad in composite thermal insulation systems. As CTIS are unable to carry structural loads, the insulation panels are usually anchored to the structural framework of the building with the help of spacer sleeves, subframes made of wood or plastic or countered threaded bars.

These complex solutions lead to two essential problems: first, distance or spacer sleeves generate an unfavourable static system with a low inner lever arm. The tensile force created by the offset torque in the anchor often exceeds the load-bearing capacity of the building material.

Secondly, thermal bridges develop when installing subframes or spacer sleeves made of metal. The related uncontrolled heat loss encourages condensation (dampstains, fungus) at the insides of the walls.

Good physical properties - easy installation

The fischer Thermax 12 and 16 have been developed for anchoring heavy loads such as awnings, winter gardens and roof elements to outside walls with composite thermal insulation systems, insulations at ceiling front faces or curtained, ventilated facades. Thermax 8 and 10 are suitable for fixing medium loads such as downpipes, lights, blinds, letter boxes, alarm systems, signs and lightning conductors. The elements hold in all common building materials and can also be mounted on uneven surfaces.

Thermax 12 and 16

The all-round installation sets fischer Thermax 12 and 16 are capable of bridging insulation layers between 60 mm and 200 mm – and with a very low thermal conductivity coefficient. This is accomplished by the thermal separation module made of glass-fibre-reinforced plastic. The multi-functional cone thermally separate connects the electroplated anchor rod for installation in the building material and the stainless steel threaded pin for the installation of the bracket. 

The installation sets includes electroplated anchor rods (M 12 or M 16), anchor sleeves, (16 mm or 20 mm diameter) for fixings in hollow or perforated bricks, threaded pin, washer and stainless steel hexagonal nut. The anchor rods are permanently set in the building material using the fischer FIS V 360 injection system..

Without the need for special tools, the fischer Thermax 12 and 16 allow the fast and safe installation in the building material. After setting the drill hole, the anchor rod is adapted individually and the thermal separation module is fixed in place. A hexagonal drill bit included in the set is placed on top of the threaded pin and, with the power drill in the impact setting, the cone mills with its milling ribs through the rendering into the insulation.

The drill hole is cleaned out and the additional anchor sleeve is inserted into perforated or hollow bricks. The hole is then filled with the FIS V injection resin, and the Thermax is pushed in with a slightly turning movement. After the injection system has cured, the separation module can still be readjusted to make sure that the anchor plates and the brackets can be adapted. The annular gap at the rendering is then sealed with the fischer DK sealing adhesive, and the bracket is fixed in place with the hexagonal nut.

Thermax 8 and 10

The all-round installation sets fischer Thermax 8 and 10 are capable of bridging insulation layers between 45 mm and 200 mm. They include the tried and tested fischer Universal plug made of nylon (UX 10 or UX 12), an electroplated stock screw (M 8 or M 10) and a glass-fibre-reinforced thermal separation module made of nylon. The annular gap at the fischer Thermax is closed with sealing adhesive and sealed with a special cap.

Without the need for special tools, they are easily, quickly and professionally set and safely anchored in the substrate. Minus tolerances in the wall structure of as much as 20 mm are easily compensated. Time-consuming adapting (cutting to length) of spacer sleeves, for instance, to the situation on site is no longer required, cost-intensive working time is saved.

Both elements can also absorb substantially greater loads than the usual fixing elements which merely anchor in the insulating material. They also provide a wide range of connecting options: 4.5 mm to 6,0 mm chipboard screws, 6.3 mm sheet metal screws, M 6 and M 8. In subframes made of wood, the fischer Thermax elements can also be turned in directly without anchor.

A video on "Fixings in CTIS" is found on www.youtube.com.