Question juridique clé
Whether the cantonal court's findings on the renovation costs and the amount of Flumroc insulation were arbitrary under Art. 9 BV.
Solution extraite
No arbitrariness was shown; the complaint did not disprove the evidentiary basis relied on by the cantonal court.
Motifs extraits
The alleged monitoring and later acceptance did not exclude unnoticed deviations, and the court relied on instructions from the appellant or his site manager, not solely on witness A.