Garage doors without internal lining are not just an aesthetic problem, but a source of constant heat loss, drafts and high humidity. In winter, up to 30% heat, and in the summer, hot metal turns the garage into a steam room. But how to sew up the gate from the inside so that the solution is both practical and budget-friendly? After all, the market offers dozens of materials - from cheap plywood to high-tech sandwich panels with polyurethane foam.

In this article we will look at 7 proven cladding options taking into account their thermal insulation properties, cost and complexity of installation. You will learn how to avoid common mistakes (for example, why polystyrene foam 5 cm thick could be worse than mineral wool 3 cm), which materials are suitable for automatic gates, and which ones are suitable for manual mechanisms. We will also provide step-by-step instructions with photos and videos, a table comparing prices and thermal conductivity, and at the end - answers to frequently asked questions from garage owners.

1. Selection criterion: what is more important - warmth, price or durability?

Before you run to the store for the first OSB sheet you come across, decide what tasks the sheathing should solve:

  • 🔥 Thermal insulation — relevant for heated garages or regions with frosts below −20°C. Here the leaders are materials with a lower thermal conductivity coefficient 0.035 W/mK.
  • 💰 Budget — if the garage is used only for parking, you can save on insulation by choosing plywood or corrugated sheets with minimal insulation.
  • ⚡ Weight - heavy materials (for example, DSP) require reinforcement of hinges and gate automation. For sectional doors, the weight of each element is critical.
  • 🛠️ Difficulty of installation - some insulation materials (for example, sprayed polyurethane foam) require professional equipment, others can be installed in a weekend with your own hands.

The key mistake of 80% of garage owners: choosing a material based only on price without taking into account climatic conditions. For example, in Leningrad region with high humidity, polystyrene foam without vapor barrier will rot in 3–4 years, whereas in Krasnodar region it will last for decades. And in Yakutia even 10 cm of mineral wool may not save you from freezing if the cold bridges are not closed.

If your garage:

  • 🚗 Used as a workshop or tool storage → priority warmth + strength (sandwich panels, DSP).
  • 🏠 Is adjacent to the house or has heating → needed vapor barrier (avoid foam without protection).
  • 🔧 With automatic gates → choose lightweight materials (polyurethane foam, basalt wool).
📊 What type of door do you have in your garage?
Swing metal
Sectional lifts
Roller shutters
Recoil
Other

2. TOP 7 materials for cladding: pros, cons, prices

Let's compare the most popular options based on key parameters. The data is relevant for 2026 (prices are per 1 m² including fasteners and components).

Material Thermal conductivity
(W/mK)		 Cost (₽/m²) Difficulty of installation Service life (years) Features
PPU sandwich panels 0,022 1 200–2 500 Average 20+ The best insulation, but expensive. Requires sealing of joints.
Mineral wool 0,035–0,045 300–800 High 10–15 Eco-friendly, but afraid of moisture. Need a vapor barrier.
Foam plastic (PSB-S-25) 0,038 200–500 Low 5–10 Cheap, but fragile. Rodents love him.
OSB-3 (12 mm) 0,13 400–700 Low 7–12 Durable, but provides almost no insulation. Suitable for frame.
Profiled sheet with insulation 0,04–0,07 800–1 500 Average 15+ Good for sliding gates. Noisy in the rain.

The most balanced option in terms of price/quality - combination of OSB + mineral wool. It will cost 700–1,200 ₽/m², but will last 10–15 years with proper installation. If your budget is limited, you can get by foam plastic 5 cm with sheathing plywood 6 mm - it’s 40% cheaper, but the thermal insulation will be 30% worse.

⚠️ Attention: Do not use expanded polystyrene without fire retardant additives (labeling PSB without a letter C) - it supports combustion! Suitable for garage only PSB-S (self-extinguishing).

3. Step-by-step instructions: how to sheathe a gate from the inside with your own hands

Let's consider a universal algorithm using the example of cladding swing metal gates combination OSB + mineral wool. For other materials, the steps are similar, only the fastening and sealing are different.

Remove rust and old coating from the gate|Check the operation of the hinges and locks|Measure the exact dimensions of the gates (including seals)|Buy materials with a 10% margin for trimming|Prepare tools: screwdriver, hacksaw, stapler, polyurethane foam

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Step 1. Surface preparation

Clean metal from rust metal brush or Bulgarian with a petal circle. Treat the surface anti-corrosion primer (for example, Tsinkor-Auto). If the gate has been previously painted, remove any loose paint. For better adhesion of the insulation, you can apply glue foam (for example, Tytan Professional) pointwise around the perimeter.

Step 2. Attaching the frame

From wooden blocks 40×40 mm or metal profile assemble the sheathing in increments 40–50 cm. Attach it to the gate on screws for metal (for wooden blocks) or rivets (for profile). Mounting depth - not less 20 mm into metal. Check with a level that the frame is strictly perpendicular to the plane of the gate!

Step 3. Laying insulation

Slice mineral wool (for example, Rockwool Light Butts) knife with serrated blade according to the size of the frame cells. Lay her down by surprise, no gaps. For foam use polyurethane foam for sealing joints. If the insulation is thicker than the frame, add a second layer of lumber on top of the first.

Step 4. Covering with facing material

Secure OSB sheets or plywood on the frame self-tapping screws with a press-cut (step 15–20 cm). Step back from the edges of the sheet 5–10 mm for thermal expansion. Close the joints between the sheets aluminum tape or sealant. For aesthetics, you can paint the surface acrylic paint (for example, Tikkurila Remontti-Assa).

Step 5. Sealing and final work

Stick around the perimeter of the gate sealing tape (for example, Deventer) to protect against drafts. Check the operation of the locks and hinges - they should not cling to the skin. If the gate is automatic, adjust limit switches taking into account the new weight of the sashes.

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If the gate is often opened in winter, install magnetic seal instead of rubber - it does not freeze and lasts longer.

4. Features of cladding for different types of gates

The installation technology depends on the gate design. Let's look at the nuances for the three most common types.

4.1. Swing gates

The easiest option for self-cladding. The main thing is strengthen the hinges, since the weight of the sashes will increase by 15–30 kg. If the gate is old, replace the hinges with adjustable (for example, Hafele) - they will allow you to compensate for sagging.

For insulation use hard materials (foam plastic, polyurethane foam), since soft cotton wool can wrinkle when opening. The optimal insulation thickness is 5 cm.

4.2. Sectional overhead doors

Critical here weight of each segment. If you cover them with too heavy materials (for example, DSP), the lifting mechanism will fail. Best choice:

  • 🧊 Polyurethane foam sandwich panels thick 20–30 mm - light and durable.
  • ☁️ Basalt wool in combination with aluminum foil (reflects heat).

Fasten the casing only to the inside of the sectionswithout blocking the guides. Use adhesive sealant instead of self-tapping screws, so as not to violate the integrity of the profile.

4.3. Rolling gates

Insulating roller shutters is a difficult task, since the canvas is rolled up into a box. The only working option:

  • 🔄 Flexible insulation (for example, penofol thick 5–10 mm).
  • 🛢️ Sprayed polyurethane foam — applied with professional equipment, does not increase the thickness of the canvas.

Self-covering roller shutters not recommended — errors in installation will lead to jamming of the mechanism. It is better to order insulation from the gate manufacturer (for example, DoorHan or Alutech).

⚠️ Attention: If your gate is equipped electric drive, after covering necessarily reconfigure the current in the control unit! The increased weight of the sashes can cause overload of the motor. In the instructions for the drive (for example, FAAC 414) look for the section "Strength Adjustment".

5. Common mistakes and how to avoid them

Even experienced craftsmen make mistakes when covering gates. Here TOP-5 misses, which nullify all efforts:

  1. Ignoring cold bridges

    If you do not close the joints between the insulation and the metal polyurethane foam or sealant, heat loss will increase by 40–50%. It is especially critical for corners and places where hinges are attached.

  2. No vapor barrier

    Mineral wool and polystyrene foam without protection absorb moisture, losing up to 60% thermal insulation properties in 2–3 years. Use vapor barrier membrane (for example, Izospan B).

  3. Savings on fasteners

    Cheap screws rust and break. For metal gates take galvanized fasteners with pressboy (for example, SFS intec).

  4. Not taking into account weight

    If the sash weight exceeds 80 kg, standard hinges will not hold up. Strengthen them additional stiffening ribs or change to bearing.

  5. Poor ventilation

    A sealed garage without fresh ventilation becomes covered with mold. Leave ventilation grilles at the bottom and top of the gate or install supply valve.

What to do if the gate is skewed after insulation?

If the doors no longer close tightly, the problem is uneven weight distribution. Solution:

1. Check the diagonals of the gate - the difference should not exceed 5 mm.

2. Adjust the hinges: loosen the top one and tighten the bottom one.

3. If the sagging is severe, install additional loop in the middle of the sash or replace standard hinges with reinforced with bearings (for example, Hettich).

6. Alternative solutions: when the cladding is not suitable

If your gate has a complex structure (for example, arched or with windows), or you are not ready to spend time on installation, consider alternatives:

  • 🚪 Installation of the second (inner) sash

    A lightweight swing door made of sandwich panels. Plus: no need to touch the main gate. Cons: gets lost 30–40 cm usable area.

  • 🔥 Infrared heaters

    If the garage is rarely used, it is cheaper to heat it ceiling IR panels (for example, Ballu BIH) only during your stay. Electricity consumption - 0.5–1 kW/h.

  • ☀️ Warm floor

    Ideal for workshops infrared film floor under cover. Power - 150–200 W/m². Installation takes 1 day.

For rented garages the best option is removable insulation. For example, penofol on Velcro or textile screens with insulation (attached to magnets). Such decisions are worth 200–500 ₽/m² and are removed without leaving a trace.

7. How much does it cost to sew up a gate: budget calculation

The cost of cladding depends on the area of the gate, material and installation method. Let's calculate the budget for a standard gate size 2.5 × 2.2 m (area 5.5 m²):

Material Price per m² (₽) Total cost (₽) Additional costs
Foam + plywood 450 2 475 Adhesive foam (300 ₽), self-tapping screws (200 ₽)
Mineral wool + OSB 900 4 950 Vapor barrier (500 ₽), sealant (300 ₽)
PPU sandwich panels 2 000 11 000 Profiles for fastening (1 500 ₽)
Profiled sheet with insulation 1 200 6 600 Sealing tape (400 ₽)

If you hire a crew, add 30–50% from the cost of materials for the work. For example, cladding mineral wool + OSB turnkey will cost 7 000–8 000 ₽. In large cities (Moscow, St. Petersburg) prices are higher by 15–20%.

Where to buy materials cheaper:

  • 🏗️ Construction bases (for example, Baucenter, Leroy Merlin) - convenient, but expensive (surcharge 10–15%).
  • 🚛 Wholesale warehouses - cheaper by 20–30%, but you need to pick it up yourself.
  • 🌐 Online marketplaces (Ozone, Wildberries) - it is profitable to buy insulation in rolls (delivery is often free).
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The most budget option with acceptable quality - polystyrene foam PSB-S-25 (5 cm) + plywood 6 mm. Will cost about 2 500–3 000 ₽ for standard gates and will last 5–7 years if properly sealed.

FAQ: Answers to frequently asked questions

Is it possible to sheathe a gate from the inside without a frame?

It is possible, but only if the gate is perfectly level and you use hard materials (foam plastic, sandwich panels). To do this:

  1. Apply to metal glue foam zigzag.
  2. Press the insulation sheet and secure it dowel fungi (5-6 pieces per m²).
  3. Foam the joints polyurethane foam.

Disadvantage: Without a frame, it is difficult to attach shelves or tools to the gate.

What kind of insulation is not chewed by mice?

Rodents avoid:

  • Glass wool (but it pricks during installation).
  • Polyurethane foam (PPU) - hard and inedible.
  • Ecowool (cellulose insulation with boric acid).

Add to foam metal mesh or process bitumen mastic - Mice don't like her.

Do I need to insulate the gate if the garage is not heated?

Yes, even in an unheated garage the insulation is:

  • Reduces temperature changes, preventing condensate by car.
  • Protects metal from corrosion (fewer freeze/thaw cycles).
  • In summer, it reduces the heating of the car interior (the temperature in the garage will be lower by 5–10°C).

Enough budget option - polystyrene foam 3 cm or penofol.

How to attach the trim to metal gates?

Mounting methods:

  • Self-tapping screws for metal (for wooden frame).
  • Rivets (for metal profile).
  • Adhesive foam (for example, Tytan) - for lightweight materials (foam plastic, penofol).
  • Magnets (for removable trim).

Do not use nails or staples — they do not stick to metal.

How to insulate gates with windows?

Windows are the main source of heat loss. Solutions:

  • Replacing glass on sandwich panels - a radical but effective method.
  • Double glazing - install a second glass with an air gap 10–15 mm.
  • Film insulation (for example, Thermoflex) - glued to glass, reduces heat loss by 30%.
  • OSB shutters - removable or sliding.

If the windows are not needed, sew them up foam plastic and hem plywood.