Construction of a garage from a bar is a popular solution among car owners who appreciate environmental friendliness, ease of installation and affordable cost of the material. However, before starting the work, a key question arises: How many bars do you need in the garage?To avoid over-expenditure or shortage of material? Errors in the calculations can lead to additional costs for the delivery of missing elements or to problems with the strength of the structure.

In this article, we will discuss step-by-step algorithm for calculating the timber for a garage of any size, take into account the features of different types of timber (profiled, glued, trimmed) and provide ready-made tables for popular projects (6×4 m, 6×6 m, 4×6 m). You will also learn how to choose the right section of the bar depending on climatic conditions and loads, and which ones quirky lead to deformation of the walls after 2-3 years of operation.

If you plan to build a garage with your own hands, this material will help save you money. 15-20% of the budget due to accurate calculation and optimal selection of lumber. For those who prefer the finished solutions, we have prepared cost-sheet timber of different types of wood (pine, spruce, larch) taking into account regional prices.

1. What parameters are needed to calculate the bar for the garage

To determine precisely garage-timberFive key parameters must be considered:

  1. Garage sizes length, width and height of walls (standard height for a bar garage: 2.5-3 m).
  2. Type of bar Profiled, glued or trimmed (from this depends the cross section and method of laying).
  3. Step laying - the distance between the crowns (usually 15-20 cm for profiled timber).
  4. Extra elements - windows, gates, internal partitions (reduce the total volume of the timber).
  5. Climate pressures - the thickness of the beam depends on the region (for example, for Siberia, a section of at least 150×150 mm).

If the garage is adjacent to a house or other building, One wall can be ignored. In calculations, but you need to strengthen the attachment to the base. For separate structures, be sure to add 10-15% of the stock For pruning and possible marriage.

📊 What type of timber do you plan to use for your garage?
Profiled
Glued
Cutting-off
I haven't decided yet.

2. Formula for calculating the timber: step-by-step instructions

The basic formula for calculating the number of timbers:

Volume of the beam (m3) = (Garage perimeter × Wall height × Bar thickness) + (Inner partition area × Bar thickness)

Let's take a look at the garage. 6×4 m m wall-height 2.5 m m m m lantern-cross 150×150 mm:

  1. Calculate the perimeter: 
    (6 + 4) x 2 = 20 m
  2. We count the area of the walls: 
    20 m x 2.5 m = 50 m2
  3. Determine the volume of the bar for the outer walls (thickness 0.15 m): 
    50 m2 × 0.15 m = 7.5 m3
  4. Add an internal partition (for example, 4 m long): 
    4 m x 2.5 m x 0.15 m = 1.5 m3
  5. Total volume: 
    7.5 m3 + 1.5 m3 = 9 m3

Use it for convenience. stock ratio 1.1-1.15 (to be pruned and jointed): 

9 m3 × 1.1 = 9.9 m3

Totally required ~10 m3 of 150 x 150 mm bar.

Garage height with roof (if attic) | Thickness of the bar for your climate belt | Availability of windows and doorways | 10-15% pruning | Foundation type (ribbon, pile)->

Below are ready-made calculations for garages of standard sizes with wall height 2.5 m m m m lantern-cross 150×150 mm. Volume indicated. stockless (Add 10-15% when ordering).

Garage size (m) Perimeter (m) Volume of wall beams (m3) Number of timbers 6 m (pc) Approximate cost (ruble)*
3×5 16 6.0 60 90 000–120 000
4×6 20 7.5 75 112 000–150 000
6×6 24 9.0 90 135 000–180 000
6×8 28 10.5 105 157 000–210 000

* Prices are indicated for pine timber (average cost of 15,000–20,000 rubles/m3 in Russia, 2026). For larch or laminated timber, the cost is higher by 30-50%.

⚠️ Attention: If the height of the garage exceeds 3 m or the attic is planned, the volume of the timber increases by 20-25%. For accurate calculation, use calculator All the openings.

4. How to choose a section of the bar: dependence on climate and loads

The thickness of the bar directly affects the heat-insulation and strength garage. Recommended values:

  • 🌳 100×100 mm - only for warm regions (Krasnodar Territory, Crimea) or summer garages. Not suitable for winter use!
  • 🏡 150×150 mm - the best option for most regions of Russia (Moscow region, Volga region). It provides a balance of price and heat saving.
  • ❄️ 200×200 mm - for cold regions (Siberia, the Urals, the Far East) or if the garage is heated. Insulation is required in addition.

For laminated timber, a cross section can be used. 140×40 mm - due to the technology of gluing, it is stronger than usual and less susceptible to deformation. However, its cost is higher by 40-60%.

What if you save on the thickness of the bar?

The use of a timber thinner than 150 mm in the middle strip of Russia will lead to:

1) freezing of walls in winter (condensation by car, icing of gates);

2) structural deformation due to seasonal humidity changes (timber "leads");

3) the need for additional insulation (minwat + skin), which reduces the savings.

When choosing, also consider:

  • 🔹 Humidity of the bar - optimally 12-18%. Raw timber (more than 20%) after shrinkage will crack.
  • 🔹 Wood species:
    • Pine Budget option, but requires treatment with an antiseptic.
    • Larch-dresser - resistant to rotting, but expensive (from 25 000 rubles / m3).
    • el Lightweight, but less durable, suitable for internal partitions.

5. Common mistakes in the calculation of the bar and how to avoid them

Even experienced builders make mistakes that lead to material overruns or design problems. Here are the most common:

  1. Ignoring shrinkage - The bar shrinks to 5-8% in height in the first year. If you do not consider this when calculating the height of the gate or windows, they can "clamp". Solution: leave a gap of 5-7 cm above the openings.
  2. Not counting pruning - when cutting the beam, up to 10-15% of waste remains. Order the material with a stock or immediately buy a bar length of 6 m (standard) to minimize pruning.
  3. Mistakes in the calculation of gaps The area of windows and gates is subtracted from the total volume of the timber, but many forget to add siege (Shot) that requires additional material.
  4. The wrong foundation - for a bar garage suitable ribbon or pile-screw foundation. The plate foundation is redundant and increases the cost by 30-40%.
⚠️ Attention: If the garage is provided in the project loftThe second floor bar should be 20-30% thinner (e.g. 100×150 mm instead of 150×150 mm) to reduce the load on the lower crowns.
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Before buying a timber, check it out. straightnessPlace the board on a flat surface and measure the gap in the middle. If it exceeds 2 mm by 1 m of length - the timber is curved, it should not be taken for load-bearing walls.

6. Online calculators and programs for calculating timber

To simplify calculations, you can use specialized tools:

  • 📊 The calculator of the bars on the site "Lesbergs" - takes into account the region, the type of wood and the type of foundation. Reference: lesbirzha.ru/calculator.
  • 📱 Annex "Construction calculator" Android/iOS – allows you to save projects and compare the cost of materials.
  • 💻 Archicad or SketchUp program 3D modeling of the garage with automatic calculation of materials.

When using calculators, pay attention to:

  • Units of measurement (m3 or pieces).
  • Accounting intercolon (jute, linvatin) - they increase the height of the walls by 1-2 cm for each crown.
  • Presence extra-options (e.g., the roof or floor calculation).

Example of working with a calculator:

  1. Enter the dimensions of the garage (for example, 6×4×2.5 m).
  2. Choose a section of the bar (150×150 mm).
  3. Specify the number of windows (1) and gates (1 standard 2.5×2.1 m opening).
  4. Add an internal partition (4 m).
  5. Get the result: 9.3 m3 of timber + 20 m of insulation.
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For accurate calculation, always check the data from the calculator with a manual formula. Automated services may not take into account the specifics of your project (for example, unusual height or complex roof configuration).

7. How much does a bar for a garage cost: a comparison of prices by region

The cost of the timber varies depending on the type of wood, humidity and region. Current prices for 2026:

Breed/Type of timber Section (mm) Price per m3 (ruble) Region (example)
Pine (natural humidity) 150×150 12 000–15 000 Central Russia
Pine (dry, 12-18%) 150×150 18 000–22 000 Moscow region
Larch-dresser 150×150 25 000–30 000 Siberia
Glued timber 140×140 35 000–45 000 Any region

Savings tips:

  • 💰 Buy the bar. wholesale (from 10 m3) – many suppliers give a discount of 5-10%.
  • 📅 Order the material. winter Prices are down 15-20% due to lower demand.
  • 🚛 Look for suppliers with free-delivery (e.g. within 50 km of the sawmill).

The approximate cost of a bar for a garage is 6×4 m (10 m3):

  • Pine: 120,000-150 000 rubles.
  • Leaflet: 250,000-300,000 rubles.
  • Glued timber: 350,000-450,000 rubles.

8. Alternatives to the bar: a comparison of materials for the garage

The sleeves are not the only option for building a garage. Let’s look at alternatives with pros and cons:

Materials Pluses Cons Cost (per m2)
bricks Durability, durability, fire resistance Honey, it requires a foundation, a long masonry. 2,500-3,500 rubles.
gas-concrete Light, good thermal insulation Low frost resistance, requires finishing 1,800-2,500 rubles.
Metallic profnastication Quick installation, low price Poor thermal insulation, corrosion 1,200-1,800 rubles.
brood Environmental friendliness, ease of installation, heat Requires treatment, shrinkage, fire hazard 1,500-2,500 rubles.

The timber wins in price/quality ratio if:

  • You're building a garage. independently (no need for wage labor).
  • Important. eco-friendly microclimate (for storage not only machines, but also tools, stocks).
  • You live in a region with mild-climate (or ready to insulate the walls).
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A burrow garage pays off in 3-5 years due to savings on heating (compared to metal) and the absence of the need for major repairs (unlike aerated concrete).

FAQ: Frequent questions about the calculation of the bar for the garage

How many cubic meters of bars do you need for a 6×6 m garage?

For a garage of 6×6 m with a wall height of 2.5 m and a beam of 150×150 mm will be required ~11-12 m3 (including 10% margin). Without internal partitions - 9 m3. The exact calculation depends on the number of openings and the type of roof.

Can I use a 100×100 mm bar for a garage?

Only for summer-garage in warm regions or internal partitions. For year-round operation in the middle strip of Russia, the minimum section - 150×150 mm.

How to calculate a bar for a garage with an attic?

Divide the calculation into two parts:

  1. Lower floor: timber 150×150 mm (as in the basic formula).
  2. Attic: timber 100×150 mm (volume decreases by 30%).

Add 20% to reinforce the load-bearing walls due to the extra load.

How much does it cost to build a garage from a turnkey bar?

The cost of "turnkey" (materials + work) for a garage 6×4 m:

  • Economy-option (pine, without insulation): 250,000-350 000 rubles.
  • Standard (larch, insulation, finishing): 400,000-600,000 rubles.

Self-construction reduces costs by 30-40%.

How to avoid deformation of the timber after construction?

Four mandatory steps:

  1. Use it. antiseptic for protection against rotting (e.g., Senege Ultra).
  2. Handle the timber flame-protection (e.g., pyrilax).
  3. Install. roofing (at least 50 cm) to protect the walls from precipitation.
  4. Smoothe the intercrown stitches jute-insulation 6 months after construction (after shrinkage).