Does an object lose value due to woodpecker damage?

But ultimately, the function of the insulation is no longer given, as the woodpecker apparently pecks through to the actual house wall. So a thermal bridge is created.

We don’t know from which year the house is, but for older houses an energy certificate is issued, which can sometimes also show the thermal bridges. P.s. I used to know it, not right now, but isn’t a current energy certificate mandatory? For every property that is sold?

I claim that the woodpecker means a value impact of 0. Woodpeckers come and go, just like all animals.

Or have you ever checked in the garden whether [Wühlmäuse] damage the plants or [Ameisen] undermine the terrace?

If YOU think there is an impact, then make a price proposal. But don’t get upset if another bidder is awarded the contract.

Yes, we will not get annoyed :).

However, ants and mice are not protected, woodpeckers are.
Which would mean the hole is inhabited. At least during the breeding season, there is no patching up the hole.
This would mean that thermal insulation is not present, moisture can penetrate, etc.

I think from the perspective of only "woodpecker and hole" there might not be a direct reduction.
But because of the "!drum herum" and the fact that woodpeckers usually stay and do not leave again (except if the woodpecker dies) and the pest controller is simply not allowed to come, it is something different than when plants are damaged. The plants do not belong to the building fabric.

We were offered a property by a real estate agent that even a woodpecker currently likes :)

A completely different thought on that:
You should possibly question the reason why the property also appeals to the woodpecker!
To my knowledge, the woodpecker usually pecks where it finds potential food. It doesn’t hammer just for fun.

Accordingly, there is a possibility that in the end it is not the woodpecker that is the problem, but possibly vermin that is in or under the masonry or in the beams.

Hello,

thank you, that is also a good thought.

Basically, I also suspect that the woodpecker is only a consequence, but the actual cause is something else. Either the feed or the insulation layer itself, which the woodpecker mistakes for a tree.

In any case, I have already received a preliminary offer to repair the holes including protective devices, this would be at an estimated cost of about 7200 Euro incl. VAT.

Without considering possible consequential damages such as mold, moisture, etc. if the holes have been present for a longer time.

The woodpecker likes the sound, that's why it starts knocking. The plaster layer on Styrofoam is usually only a few millimeters thick and it gets through quickly. As far as I know, even fabric filler doesn't stop it. Once it's inside, it has found a great nest, right? :D Insulated all around, additionally heated from the house through a thermal bridge. That's a perfect place to hatch.

As a temporary measure, I have read so far: - extra thick plaster layer and extra thick fabric filler, together at least 1 cm - very smooth plaster, so that it has no grip

What protection device are you planning to use? I assume something else since you already mentioned a "device."

By the way, the NDR show just mentioned mineral foam boards (something like aerated concrete in the end), which supposedly do not sound hollow and are rather unattractive to woodpeckers. Is that true? I don't know. But a complete rebuild of the thermal insulation is obviously an extreme measure. Another option would be brick cladding. :D