Cutting wood for the roof frame yourself - Moisture - Schedule

So with the father not DIN compliant and therefore defective. Regardless of whether it works in individual cases, I would like my house to be built according to recognized standards.

Windows are no longer simply foamed in during installation today. Even if the installation on the property works, it is still not correct, as it does not comply with the current state of the rules / regulations.

And just by the way. We usually only use our forest for firewood.
But this actually doesn't belong here.

That raises the question of the type of wood. This in turn is relevant for drying and suitability for the roof structure.

The question is also whether it will be a rafter roof or a purlin roof. If it is a purlin roof, the rafters can be slimmer - depending on the planned covering and insulation - than in a rafter roof. For a photovoltaic system, they should be stronger again. They don’t cost the earth and with self-delivered and sawn wood the savings are likely marginal. It probably doesn’t save time either.
Search for
[Informationsdienst Holz DIN 4074]

It may be that I appear naive in your eyes. I would rather call it ignorance.
Can you then explain to me how the process actually looks?
That would be more constructive and would also help me more.
And just by the way. We usually only use our forest for firewood.

Then you should probably stay completely out of the long timber world, because that is completely different in several dimensions (species, qualities, cross-sections, etcetera pp.). You don't saw firewood out of the filet. A roof truss is a spatial matter. Using in the purlins - that is, in the ridgeline-parallel dimension - assembled but in the rafters - the intersecting, gable-parallel dimension - grown wood materials leads accordingly to overall constructions stabilized only halfway against warping. The developments in timber (construction) technology since the end of the "Kaiser Wilhelm" era did not come about for no reason at all - not to mention that wood in premium filet quality is currently super rare and would be a first-class waste as retro-style roof beams. The invitation to give you more precise advice if you showed the relevant house design, I will not repeat again after having ignored it several times. How the process - I assume "ärgerlich" was intended to mean "eigentlich" before spellchecking - looks has already been explained here: 1. the wood processed next year was already felled in 2018, 2. saw boards (or have had them sawed) from it, 3. use assembled wood materials in both dimensions - whether it is generally the smartest choice as rafters in beam cross-sections, as said, cannot be seen from the texts alone. Not to mention that currently felled timber, otherwise basically suitable for construction purposes, will very rarely actually produce the required beams: the wood of your bold dreams would either be too crooked before or after sawing for what you intend to do with it - and it would remain not dimensionally stable in size and structure (probably to a statically relevant extent). All your naivety is completely explained by the "confession" that you have only dealt with wood previously for burning. If the intended company shares your naivety, I unfortunately see no advantage here in the "personal union" of sawing and processing operations.

The question is also whether it will be a rafter roof or a purlin roof. If it is a purlin roof, the rafters can be slimmer depending on the planned covering and insulation than with a rafter roof. For a photovoltaic system, however, they should be stronger again. They don’t cost the world, and with self-delivered and sawn timber the savings should be marginal. It probably doesn’t save much time either. Search for Informationsdienst Holz DIN 4074

A purlin roof structure is planned. The reason for supplying the timber myself was exactly the price.

This raises the question of the type of wood. This, in turn, is relevant for the drying and suitability for the roof structure.

It is planned that we will fell spruce wood.