Which is warmer, a house made of aerated concrete or a log house made of wood? Showing calculations

In the comments, readers sometimes write that a house made of wood is better than any house made of aerated concrete, including the fact that it is warmer. Each material has its own pros and cons. But it became interesting to me to compare wood and aerated concrete of different density in terms of thermal resistance in a heat engineering calculator. Let's see what happened.

There are many similar diagrams on the Internet illustrating the comparison of different building materials.

This shows the thickness of the materials with the same thermal resistance values. Wood beats aerated concrete in 1.66 times for this indicator. This picture was even more interesting, but what will the calculation show?

Common size of timber walls: 150x150 mm or 180x180 mm. Sawing with a large section is extremely rare and at a different price. Compare the wall 180 mm made of wood with popular sizes and densities of aerated concrete blocks: 300 mm D400 and 400 mm D500.

I counted in the conditions of the Siberian climate for my region. Resistance to heat transfer [R] against a wall of timber thick

From 150 mm timber [R] =0,23 (m2 * C) / W. Glued laminated timber 150 mm - 1,16 (m2 * C) / W. Resistance to heat transfer is achieved by the normative only when a log house is insulated from a 180 mm timber with a 100 mm thick mineral slab (with a density of up to 120 kg / m3). Only then [R] =4,08 (m2 * C) / W.

Let's move on to aerated concrete. The first option is walls made of aerated concrete with a thickness of 300 mm and a density of D400.

Heat transfer resistance [R] =2,81 (m2 * C) / W. Such a wall in the Siberian climate also does not pass according to the thermal engineering calculation, but it is almost twice as warm as a 180 mm timber. And taking into account the fact that the wall is not blown into the wind, unlike blowing a log house through the seams and cracks with jute - and even more so. When insulating with a min-plate of 100 mm, [R] =5,44 (m2 * C) / W.

I took the characteristics of my house - the thickness of the walls made of aerated concrete 400 mm and density D500.

Heat transfer resistance [R] =3,00 (m2 * C) / W. This, of course, does not reach the standard. 3,66 (m2 * C) / W and the house also requires insulation, but my walls are more than two times warmer than walls made of 180 mm thick timber.

The price of my walls RUB 2800 / m2 (the price today for aerated concrete is 7000 rubles / m3), and the price for walls made of wood is 20 thousand rubles. rub / m3 - RUB 3600 / m2. Aerated concrete walls with a thickness of 400 mm and a density of D500 are 1.3 times more profitable than a bar at a price and twice as warm as walls made of a bar of 180 mm. With approximately the same thermal resistance, there will be a plastered garage made of aerated concrete blocks with a thickness 200 mm and a wooden blockhouse from a bar 150 mm.