Roof of the attic to a wooden house

Firstly, I note that I do not know where you live, as well as the approximate prices in your area. As I understand it, according to your question, you will fix the roof on separate supports that will be installed outside the wooden house made of timber. You also plan to equip the attic as a second residential floor. So, if you do not want to install the attic on the walls of the house, then you can not be sure that the walls can withstand stress. Note that the walls will still receive their portion of the load, as it will give furniture and various household utensils. Why do you actually start the construction of a new house without walls? How can you save on this? Now, if you were building an attic, then everything cannot be taken into account.

If you do not want to disassemble the old house, disassemble the bars, and put new supports, then I will give one good advice. It is easier to make a new foundation for the house from the outside of the old one, put new pillars, make a dressing at the top, install a roof, and only then disassemble the old walls of the house, which can be put on the inner partition, and also inserted into new walls. In this way you get a new home and significantly save on materials. And all this will not look outwardly like a makeshift. We make the attic roof itself gable, which will be distinguished by its broken profile. And the gable roof itself is much easier to do - it is arranged with the help of two load-bearing walls of the house, which should be the same height.

It is also nice to make a pitched roof for a wooden house, you just need to make a slight slope so that the water can drain, and so the roof will not be expensive. The pitched roof looks worse than that of the neighbors, but it will come out much cheaper.

So to summarize. You must calculate the prices on your own based on the prices in your region. It is better not to install separate supports, but to build new walls. The roof for the attic should be gable to create a separate room, fit all the furniture and utensils. Natural tiles are most suitable for home. It weighs not much, it is convenient to install it, it does not give large loads on wooden log houses, its weight is usually equal to only a quarter of the calculated load on the building from snow and water. Therefore, customers usually do not even have to change the rafter structures of the structure. The most difficult part of building a roof is the construction of the rafter system, which requires remarkable skills.