Wood question roof truss single-family house cold roof - is KVH necessary?

Hello everyone,

a brief info in advance: I am currently planning the awarding of the roofing contract for a single-family house with a cold roof. The roof truss for the gable roof will not be visible from the outside (no rafters visible) and will of course not be used as living space. I will only maybe take a look in for inspection or the chimney sweep can have a little fun up there, nothing more.

I have now received an offer from the carpenter who uses KVH. In the consultation, he did not mention any alternative, he only works with KVH. He will prefabricate the roof truss in his workshop and store it (this way he is flexible). Only after the appointment did I inform myself on the internet about other roof truss woods, e.g. BSH.

Maybe someone as a professional or even as the owner of a single-family house with a cold roof can report which wood was used with them and how satisfied they are with it?!

I myself find it only logical that as a craftsman you work with materials that have consistent tested quality. I can also fully understand the additional cost. But does it really have to be KVH in this case?

I must also admit that I have to do some convincing with my wife here – an acquaintance who works as a teacher at the vocational school for carpenters casually told her that we don’t need KVH, simple construction timber is enough. Now my word stands against that of a teacher :rolleyes:

Many thanks for your answers!

Hello,

I myself find it only logical that as a craftsman you work with materials that have consistent tested quality. I can fully understand the additional cost as well. But does it really have to be KVH in this case?

I must also admit that I have to do some convincing with my wife here - an acquaintance who works as a teacher at the vocational school for carpenters casually told her that we don’t need KVH, simple construction timber is enough. Now my word stands against that of a teacher :rolleyes:

If your wife is so easily influenced, then she should ask the teacher friend to build the roof truss with his students and of course also take on the liability ;)

KVH is a separate quality agreement of the wood industry that goes beyond the sorting qualities of DIN 4074 in various points and thus offers a defined higher standard. It is no coincidence that the vast majority of suppliers use KVH; it is technically dried and far less prone to cracking than the material mentioned by the teacher. From my point of view, quality should always be chosen over thoughtless saving; even with an interior roof.

Rhenish greetings