ᐅ Cutting Your Own Timber for the Roof Frame – Moisture Considerations – Scheduling
Created on: 15 Dec 2021 15:38
T
Thomas.W
Hello dear forum,
We are currently planning the construction of our house.
We are planning a solid masonry house with a pitched roof. All work will be subcontracted to individual trades.
Our plans are already quite advanced.
We have already contracted most of the companies and are basically just waiting for the completion of the new development area.
Originally, we wanted to start at the end of 2022, but due to the delayed start of the site infrastructure, we decided to begin in spring 2023 instead.
The construction company has scheduled our project as their first site once weather conditions allow.
Now to my main topic.
I have some questions regarding the roof structure. I have already tried to clear up my lack of knowledge by searching on Google, but I still don’t fully understand. I hope you can help me. Due to the sharply increased cost of timber, we want to fell our own wood. We have our own forest, and our carpenters with a sawmill are only 2 meters (6.5 feet) away from it.
I have already discussed this with them, and they said it would be sufficient if I cut the wood in winter 2022 and then bring it to them. The logs would then be stored outdoors until they process the wood.
If we start excavation at the beginning of March, we should be able to begin raising the structure around May.
My question is whether the timber will be sufficiently dry for that?
Or will it have dried enough by then?
The company has been around for a long time, and I haven’t heard anything negative regarding the quality.
Is this approach common in construction?
I would appreciate any help you can provide.
Thank you in advance.
We are currently planning the construction of our house.
We are planning a solid masonry house with a pitched roof. All work will be subcontracted to individual trades.
Our plans are already quite advanced.
We have already contracted most of the companies and are basically just waiting for the completion of the new development area.
Originally, we wanted to start at the end of 2022, but due to the delayed start of the site infrastructure, we decided to begin in spring 2023 instead.
The construction company has scheduled our project as their first site once weather conditions allow.
Now to my main topic.
I have some questions regarding the roof structure. I have already tried to clear up my lack of knowledge by searching on Google, but I still don’t fully understand. I hope you can help me. Due to the sharply increased cost of timber, we want to fell our own wood. We have our own forest, and our carpenters with a sawmill are only 2 meters (6.5 feet) away from it.
I have already discussed this with them, and they said it would be sufficient if I cut the wood in winter 2022 and then bring it to them. The logs would then be stored outdoors until they process the wood.
If we start excavation at the beginning of March, we should be able to begin raising the structure around May.
My question is whether the timber will be sufficiently dry for that?
Or will it have dried enough by then?
The company has been around for a long time, and I haven’t heard anything negative regarding the quality.
Is this approach common in construction?
I would appreciate any help you can provide.
Thank you in advance.
Nida35a schrieb:
Can’t you exchange dry wood for fresh wood with the carpenter/sawmill?I have actually thought about that as well. Could someone explain how the delivery process of raw timber to the sawmill works? Is the felled wood stored in the forest for some time to dry before it is delivered to the sawmill?
At most sawmills around here, the logs are stored outdoors in the open air in front of the sawmill, often for six months to a year before processing. Does the wood dry in this way? Doesn’t the wood absorb a lot of moisture again when exposed to the weather?
Benutzer200 schrieb:
Then he doesn’t understand his trade 😉. You can search online for experiences with damp wood in roof structures. From extensive mold to cracks, shrinkage, and so on. That’s something I definitely don’t want in my house.
Besides, ask your carpenter what moisture content the DIN standard recommends and why he wants to deviate from it. Damp wood is NOT state of the art and is a serious defect.
Don’t guess 😉 Damp wood is not used (and shouldn’t be). Damp wood is dried. Either it started drying three years ago or it’s dried in a kiln, which is the modern method. That’s as normal as breathing. Well, I wouldn’t go so far as to say he doesn’t know his trade.
The craftspeople already built the roof structure for my father and my sister.
There haven’t been any mold problems there either. But I will take a close look at it in the next few days.
But not every sawmill has a drying kiln. And I don’t think anyone nowadays has three years to wait for the wood to dry.
Please don’t misunderstand me. I am very thankful for all your quick responses and I fully agree with your statement. But I don’t want to present the ideal case here. If I had the time and work, I would of course do it that way. I just thought maybe one of you has experience with this and could share your insights.
M
Myrna_Loy16 Dec 2021 09:23Drying chambers are not cheap because they consume a lot of energy. And currently, no sawmill is waiting for customers. The chambers are all fully booked. The expensive part is not the wood itself, but the entire logistics behind producing construction timber—and you can’t avoid that just because you own a forest. If I remember correctly, we waited four months for the dried wood for only two logs.
And no, sawmills and timber merchants do not exchange dried construction timber for fresh logs—why would they? You don’t get bread rolls from a bakery in exchange for flour either.
And no, sawmills and timber merchants do not exchange dried construction timber for fresh logs—why would they? You don’t get bread rolls from a bakery in exchange for flour either.
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Benutzer20016 Dec 2021 09:55Thomas.W schrieb:
The craftsmen have already built the roof frame for my father and my sister. They also have to comply with the DIN standards (it was even once stated in the VOB that a maximum of 20% moisture content is allowed – I’m not sure if that still applies today). And it doesn’t work the way you imagine with just a few months of drying.
Thomas.W schrieb:
And I believe nowadays no one has three years to wait until the wood is fully dried. Have you ever noticed how many sawn boards are stacked at the sawmill or timber wholesaler? They are stored there to dry (of course). And sawing doesn’t take as long as drying a whole log.
Thomas.W schrieb:
What else should the beams be made from, if not from a solid tree trunk?
As I said, the purlins are made from glued laminated timber beams. As mentioned, we lack the basic information to assess whether rafters as traditional beams are the best option here at all. And of course, they cannot be made as glued laminated beams like the purlins; beams tend to warp relatively more.
Thomas.W schrieb:
Can someone explain to me how the delivery process of raw timber to the sawmill works?
Is the felled wood stored in the forest to dry before it is delivered to the sawmill? You own woodland but are working with a sawmill for the first time? Okay, that explains your naivety.
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