ᐅ Installation blocks added later in the external thermal insulation composite system (ETICS)...
Created on: 28 Sep 2016 19:41
K
krenzwo
Hello,
The background of my question is the retrofitting of shutters on a rendered ETICS facade with 16cm Styrofoam (6 inches) insulation and 16cm aerated concrete as the structural backing wall. Some installers recommend using ETICS thermal anchors for this, while others say the leverage forces are too high and instead suggest insulating mounting blocks that are bonded to the structural backing wall with threaded rods/sleeves/injection mortar. I tend to favor the mounting blocks myself but, as a layperson, I cannot assess the risks involved.
Now the specific question: If you open an existing ETICS facade, cut out a piece of Styrofoam, fix a mounting block to the backing wall, then put the piece of Styrofoam back on, reapply reinforcing mesh and render, what risks does this involve? Would the “damaged” spot in the ETICS then be particularly susceptible to moisture?
Thanks for your advice,
Good luck
The background of my question is the retrofitting of shutters on a rendered ETICS facade with 16cm Styrofoam (6 inches) insulation and 16cm aerated concrete as the structural backing wall. Some installers recommend using ETICS thermal anchors for this, while others say the leverage forces are too high and instead suggest insulating mounting blocks that are bonded to the structural backing wall with threaded rods/sleeves/injection mortar. I tend to favor the mounting blocks myself but, as a layperson, I cannot assess the risks involved.
Now the specific question: If you open an existing ETICS facade, cut out a piece of Styrofoam, fix a mounting block to the backing wall, then put the piece of Styrofoam back on, reapply reinforcing mesh and render, what risks does this involve? Would the “damaged” spot in the ETICS then be particularly susceptible to moisture?
Thanks for your advice,
Good luck
Hello Robbaut,
My shutter installer advised against using thermal insulation anchors (WDVS dowels). The shutters need to withstand forces, for example, during strong gusts of wind. The thermal anchors span 16cm (6 inches) of Styrofoam insulation and are anchored in crumbly aerated concrete. The concern is that shear forces might create gaps in the drill hole, allowing driving rain to enter the insulation system (WDVS).
Do you have any personal experience with Thermax anchors?
Thanks and good luck
My shutter installer advised against using thermal insulation anchors (WDVS dowels). The shutters need to withstand forces, for example, during strong gusts of wind. The thermal anchors span 16cm (6 inches) of Styrofoam insulation and are anchored in crumbly aerated concrete. The concern is that shear forces might create gaps in the drill hole, allowing driving rain to enter the insulation system (WDVS).
Do you have any personal experience with Thermax anchors?
Thanks and good luck
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