Garage made of FBS blocks: how to build a reliable shelter for a car with your own hands

Garage from FBS blocks (foundation wall blocks) is a practical solution for those who want to quickly and relatively inexpensively build a capital structure for a car. Unlike wooden or metal structures, such a garage is not afraid of fire, rodents and corrosion, and its strength is comparable to brick buildings. But before starting construction, it is important to understand the nuances: from the choice of blocks to waterproofing and insulation.

In this article we will look in detail why FBS (not FBV or FL) - the optimal material for a garage, how to correctly calculate the number of blocks, avoid mistakes when laying and save on the foundation. You will also find step-by-step instructions with photos, a comparative table of materials and answers to frequently asked questions from car owners who have already built similar garages.

What are FBS blocks and why are they suitable for the garage

FBS blocks (foundation wall blocks) are rectangular reinforced concrete products intended for the construction of basement walls, plinths and load-bearing structures. Their key features:

• 🏗️ High strength — can withstand loads of up to 600 kg/cm², which is 2–3 times more than that of foam blocks.
• ⏱️ Installation speed — masonry goes 5–7 times faster than brick.
• 🔥 Fire resistance — do not burn and do not support combustion (fire safety class NG).
• 🛡️ Durability - service life of 50+ years with proper waterproofing.

Blocks of brands are usually used for the garage FBS-24-4-6t (length 2380 mm, height 580 mm, width 400 mm) or FBS-12-4-6t (1180×580×400 mm). The weight of one block is from 1 to 2 tons, so installation will require a crane or manipulator. Alternative - FBV (with a cutout for communications), but they are less durable and are only suitable for interior walls.

Compared to other materials, FBS has an advantage in terms of price/quality ratio:

Material	Cost per m² of wall (2026)	Construction period	Strength	Thermal insulation
FBS blocks	2 500–3 800 ₽	3–5 days	⭐⭐⭐⭐⭐	⭐ (requires insulation)
Brick	3 200–5 000 ₽	14–21 days	⭐⭐⭐⭐	⭐⭐
Foam blocks	1 800–2 500 ₽	7–10 days	⭐⭐⭐	⭐⭐⭐
Metal garage	2 000–4 000 ₽	1–2 days	⭐⭐	⭐ (freezes)

Critical nuance: FBS blocks do not retain heat, so without insulation in winter, the garage will have the same temperature as outside. This is important for car owners who store their car with battery or tires — at sub-zero temperatures, battery life is reduced by 30–40%.

Pros and cons of a garage made of FBS blocks

Such a garage has more advantages than disadvantages, but the latter often come as a surprise to beginners. Let's look at both lists in detail.

Benefits:

• 🔨 Easy to install — the blocks are laid like a constructor, no mason experience is required.
• 💰 Saving on foundation — due to the large weight of the blocks, a strip base 50–70 cm deep is sufficient (unlike brick, where a buried strip is needed).
• 🛠️ Versatility - you can build a garage with a basement, inspection hole or second floor (for a workshop).
• 🚜 Gate compatibility — support the weight of sectional or swing gates without additional reinforcement.

Disadvantages:

• 🧊 Cold walls — without insulation, condensation on the machine and tools is guaranteed.
• 🚧 Equipment required — blocks weighing 1+ tons cannot be lifted manually; renting a crane will cost 8,000–15,000 ₽/day.
• 💧 Waterproofing is required — concrete absorbs moisture, which leads to mold and rust on metal parts.
• 📏 Limited sizes - standard blocks are multiples of 60 cm, so a 4x6 m garage is easy to build, but a 5x7 m garage is more difficult (you'll have to cut the blocks).

One of the main fears of car owners is humidity in the garage from FBS. Indeed, without waterproofing and ventilation, fungus will appear on the walls, and the car body will begin to rust. Solution:

• 🔹Use penetrating waterproofing (for example, Penetron) for blocks.
• 🔹 Install supply and exhaust ventilation with pipes with a diameter of 100–150 mm.
• 🔹 Decorate the walls from the inside vapor barrier membrane before insulation.

Step-by-step instructions: how to build a garage from FBS blocks

The whole process can be divided into 7 stages. If you hire a team, control every step - mistakes in the early stages (for example, incorrect marking of the foundation) will cost 30-50% of the budget.

1. Design and calculations

Standard garage sizes for one car are 3x6 m or 4x6 m. For two cars - 6x6 m or 7x6 m. When calculating the blocks, consider:

• 📐 Wall thickness — 40 cm (block width FBS-24-4-6t).
• 🔢 Garage height - 2.5–3 m (4–5 rows of blocks 58 cm high).
• 🚪 Gate opening - the width is 20–30 cm larger than the gate (for example, for a 2.5 m gate you need an opening of 2.8 m).

Formula for calculating the number of blocks:

Number of blocks = (Garage perimeter × Height) / Area of one block
Example for a garage 4x6 m (height 2.88 m, block FBS-24-4-6t):
(20 m × 2.88 m) / 1.38 m² ≈ 42 blocks

2. Foundation for a garage made of FBS

The best option is strip foundation depth 50–70 cm (below the soil freezing level). The width of the tape should be 10–15 cm wider than the block (i.e. 50–55 cm). Work order:

1. Marking the area using pegs and rope.
2. Digging a trench (can be done manually or with an excavator).
3. Laying a sand cushion (15–20 cm) and tamping.
4. Installation of formwork from boards or plywood.
5. Reinforcement with steel rods ∅12–14 mm (cell 20×20 cm).
6. Pouring concrete M200–M250 (you can order a mixer or mix it yourself).

Important: the foundation must “settle” for 2–3 weeks before laying the blocks. If you are in a hurry, use quick-hardening concrete (gains strength in 3–5 days).

3. Laying walls from FBS blocks

For installation you will need:

• 🏗️ Crane or manipulator (rent ~10,000 ₽/day).
• 🔧 Cement-sand mortar (M100) or block glue.
• 📏 Laser level or level.
• 🔨 Sledgehammer and chisel (for adjusting blocks).

Laying algorithm:

1. Apply the solution to the foundation in a layer of 2–3 cm.
2. Install the first row of blocks, checking the level in all planes.
3. Fill the vertical joints with mortar (joint thickness - no more than 1 cm).
4. Repeat for the next rows, shifting the blocks relative to the bottom row by 10–15 cm (dressing).
5. Leave openings for gates and ventilation holes.

4. Insulation and waterproofing

Without insulation, the garage will be damp and cold. Optimal materials:

• 🧱 Expanded polystyrene (PPS) — thickness 5–10 cm, attached with glue + dowels.
• 🧴 Sprayed polyurethane foam (PPU) - more expensive, but does not require a frame and seals the seams.
• 🧰 Mineral wool - only for internal insulation (afraid of moisture).

Waterproofing is carried out in 2 stages:

1. Coating - applied to blocks from the outside (for example, TechnoNIKOL No. 24).
2. Roll - placed under insulation (for example, Ruberoid or Bikrost).

5. Roof and gates

Suitable for a FBS garage:

• 🏠 Shed roof - simpler and cheaper, slope 5–10°.
• 🏡 Gable roof - allows you to create an attic for storage.

Roofing materials:

• 🟢 Profiled sheeting (S-21 or NS-35) - inexpensive and fast.
• 🟣 Metal tiles are more expensive, but more aesthetically pleasing.
• ⚫ Soft roof (TechnoNIKOL) - suitable for flat roofs.

Choose gates based on your budget:

• 🚪 Swing — cheap (RUB 15,000–30,000), but take up space when opened.
• 🔄 Sectional - comfortable (RUB 30,000–60,000), but require space under the ceiling.
• 🔺 Roller shutters - compact (25,000–50,000 ₽), but less reliable from hacking.

6. Ventilation and electrical

Supply ventilation:

• Install the pipe ∅100–150 mm at the bottom of the wall (at a height of 20–30 cm from the floor).
• Cover it with a rodent grill.

Exhaust ventilation:

• Pipe ∅100–150 mm in the ceiling or upper part of the wall (output to the roof).
• To increase traction, use deflector.

Electrical:

• Wiring - VVGng 3×2.5 in corrugation.
• Sockets are waterproof (IP44).
• Lighting - LED panels or spotlights.

7. Decoration and landscaping

The inside of the garage can be finished:

• 🧱 Plastering + painting - budget-friendly, but short-lived.
• 🧰 Drywall + tiles - aesthetically pleasing, but afraid of moisture.
• 🪨 OSB boards + polyurethane paint - optimal for price and durability.

Outside:

• 🎨 Facade plaster (Bark beetle, Lamb).
• 🧱 Facing brick or clinker panels.
• 🌿 Vertical landscaping (if the garage is adjacent to the house).

How much does it cost to build a garage from FBS blocks in 2026?

The cost depends on the size of the garage, the region and whether you will hire a crew or do it yourself. Let's consider calculations for a garage 4x6 m (height 2.88 m) in the Moscow region.

Expense item	On your own (₽)	Turnkey (₽)
FBS blocks (42 pcs.)	84 000–120 000	included
Foundation (strip)	40 000–60 000	50 000–80 000
Crane (1 day)	10 000–15 000	included
Insulation (PPS 5 cm)	15 000–20 000	20 000–30 000
Roofing (corrugated sheeting)	20 000–30 000	25 000–40 000
Gates (swing)	15 000–25 000	20 000–35 000
Ventilation and electrical	10 000–15 000	15 000–25 000
TOTAL	194 000–285 000	300 000–500 000

The payback period is 5–7 years (compared to renting a garage for 3,000–5,000 RUR/month). If you build it yourself, the savings will be 30–40%.

How to save on construction?

1. Buy FBS blocks in bulk - up to 15% discount.

2. Order concrete with a mixer (cheaper than bags).

3. Use a used gate (check for rust and tightness).

4. Make a pitched roof - save 20-30% compared to a gable roof.

Common mistakes during construction and how to avoid them

Even experienced builders sometimes make mistakes, which then cost a lot of money. Here are the most common:

1. Wrong foundation

⚠️ Attention: If you do not take into account the groundwater level, the foundation may “float” in 1–2 years. Solution: make a drainage system (pipes ∅110 mm around the perimeter) or use slab foundation on heaving soils.

2. Saving on waterproofing

Concrete absorbs moisture like a sponge. Without waterproofing, the walls will be wet and your garage will smell musty. Minimum protection:

• Coating bitumen mastic outside.
• Laying roofing felt under the insulation.

3. Lack of ventilation

Without air exchange, carbon monoxide (if you start the car), condensation and the smell of gasoline will accumulate in the garage. Minimum scheme:

• The supply pipe is at the bottom of the wall.
• The exhaust pipe is at the top (on the opposite wall).

4. Poor quality block laying

⚠️ Attention: If the seams between the blocks are thicker than 1.5 cm, the walls will freeze. Use glue for blocks instead of cement mortar, it is thinner and does not form cold bridges.

5. Neglect of insulation

Many people think that “a garage is not a house, you can do without insulation.” But in winter, the temperature difference between inside and outside leads to:

• Condensation on the machine and tools.
• Icing of the gate (you won’t open it in the morning).
• Increased fuel consumption when the car warms up.

FAQ: Frequently asked questions about garages made from FBS blocks

Is it possible to build a garage from FBS blocks without a crane?

Theoretically yes, but practically no. The blocks weigh from 1 ton, and even with a winch or block system it is dangerous to lift them. An alternative is to use FBS small format (for example, FBS-9-3-6t, weight ~300 kg), but their laying will take longer, and the strength of the walls will be lower.

Is it necessary to reinforce masonry with FBS blocks?

Reinforcement is not necessary, since the blocks themselves are strong. But if you are building a garage in a seismic zone or on heaving soils, you can lay reinforcement mesh (∅6–8 mm) every 2–3 rows of blocks.

Which insulation is best for a FBS garage?

Optimal choice - extruded polystyrene foam (for example, Penoplex). It does not absorb moisture, does not rot and can withstand loads. Thickness - 5 cm for temperate climates, 10 cm for Siberia and the North.

Is it possible to make an inspection hole in a garage from FBS?

Yes, but you need:

1. Reinforce the bottom of the pit with a concrete slab 15–20 cm thick.
2. Waterproof pit walls penetrating insulation (for example, Penetron).
3. Install a stainless steel ladder.

How long will a garage made of FBS blocks last?

With proper waterproofing and care - 50+ years. Main enemies:

• Moisture (causes cracks when frozen).
• Vibration (if the garage is located next to the railway).
• Tree roots (can move the foundation).

Solution: every 2-3 years, inspect the walls for cracks and update the waterproofing.