DIY sandwich panel garage: Step-by-step instructions + Video

DIY sandwich panel garage: Step-by-step instructions + Video What is a sandwich panel? Sandwich panel is a building material consisting of three layers. Two are cladding and one includes a layer of thermal insulation. The outer layers can be metal, OSB, PVC and magnesite.

Sheathing can be either flat or profiled. There is a self-supporting insulated wire for siding, blockhouse and professional sheet.

In this article you will learn how to choose the right building materials for such a garage. And how to complete the construction correctly.


Sandwich panel is a material for building, consisting of several layers, very easy to install.


  1. DIY sandwich panel garage: Step-by-step instructions + Video roofing,
  2. wall.


Each panel includes only three layers.

Two facing and one includes a layer of thermal insulation. The outer layers can be metal, OSB, PVC and magnesite. The cladding can be either flat or profiled. There is a self-supporting insulated wire for siding, blockhouse and professional sheet.

Thermal insulation can be made of:

  • foam,
  • expanded polystyrene,
  • basalt wool,
  • polyisation cyanurate foam.


Sandwich panels have a thickness of 6 to 25 cm. Width remains unchanged from 100-125 cm. Length is 2-12 meters. The dimensions of SIP panels make it possible to build rooms without many seams and joints. The panels are chosen in accordance with the dimensions of the future structure, and they are applied vertically using a special spike method.

Advantages and disadvantages


  • DIY sandwich panel garage: Step-by-step instructions + Video Low thermal conductivity. Rooms made of sandwich panels from 10 cm will be comfortable for the southern region, for the northern it is better to choose a larger thickness.
  • There is no need to purchase interior and exterior finishes.
  • No shrinkage.
  • The garage will be very light, eliminating the need to lay a foundation.

  • Excellent sound insulation.

Disadvantages :

Tight seams. This factor is both a minus and a plus. Such connections do not allow the room to freeze, but air also easily enters the room. Because of this, there is a high probability of dampness and mold in the room.

It is recommended to immediately install good ventilation in such rooms.

  • Panels reaching a height of 5m can deform under load. An excellent option would be to install panels up to 2.5 m.
  • Subjects to light fire.

    This applies more to foam insulation.

Making a garage from the joint venture

Choosing a project for a garage

You don't need special skills to build a garage, therefore it is quite possible to make it yourself. Before that you need to :

  1. Decide on the location of the future garage.
  2. Select parameters of dimensions (length, area, width).
  3. Select the location of windows and vents, as well as their location.

  4. Solve with the choice of gate (location, material, etc.).
  5. Select ventilation.

For the construction of a garage, it is necessary to choose metal panels, the thickness of the heat insulator should be at least 10 cm. The usual size of a garage for one car is 3x6.

If the building is intended for two cars, then the optimal size is 4x8 m.

Types of garage doors :

  • swing,
  • sliding ,
  • lifting,
  • roll.

Most car owners don't like having windows in their garage. This is primarily a source for cold air, and secondly, unnecessary waste and installation of windows. For a garage, it is considered more important to conduct light and electricity.

An important part of such a room is the floors.

Types of flooring

  • ground,
  • adobe,
  • of wood,
  • of concrete.

A garage roof is often made either flat or with a slope at one corner.

Garage building technologies

  1. DIY sandwich panel garage: Step-by-step instructions + Video Finnish (all elements and walls are erected from panels), using a metal frame base).
  2. Russian - a slightly modified technology, floors are made of wooden materials.

The metal frame is made of:

  • racks and trusses, which are made together with sandwich panels,
  • shaped pipes and corners made of metal,
  • gas or electric welding,
  • bolts.


Laying and choosing a foundation covering is one of the most important stages in the construction of a garage from sandwich panels.


  • strip foundation with shallow deepenings,
  • foundation using reinforced concrete slabs,
  • pile method.

The most optimal choice will be the strip foundation and its independent filling.


  • There is no need to arrange flooring,
  • Stability.

    Balances fluctuations in ground coverage.

  • Withstands enormous weights.

Stages of installing the slab foundation:

  1. The location of the future garage is determined. The marking of the territory is carried out and the twine is pulled for marking.
  2. Form a hole for the foundation pit in the area of ​​the markings.

    We lay the bottom and walls with a vibrating plate.

  3. Pour sand 50-70 mm thick. The layer must be even, after which it must be tamped and leveled.
  4. Installation of formwork, or if there are no materials, a layer of roofing material is laid on the walls.
  5. Assembling a metal frame that acts as a reinforcing plate.

  6. Pouring the concrete base.

Frame for a garage made of sandwich panels

Supports from the frame are installed vertically in two ways:

  • DIY sandwich panel garage: Step-by-step instructions + Video with a small deepening into the soil surface,
  • are attached to the foundation using anchors

The elements are connected:

  • with screws,
  • bolts,
  • with self-tapping screws,
  • by welding.

Sheathing the garage with SIP panels

Before installing the panels, holes are drilled on them for fasteners. The distance between the panel and the edge of the surface is at least 5 centimeters. All fasteners must be at an angle of 90 degrees.

The main rules for installation :

  1. The very first stage is to remove the factory films from the sandwich panels from the locks. After complete installation, the panel is removed.
  2. When laying horizontally, work in a bottom-up system. Vertically, the panels are fastened from the edge of the frame.
  3. During installation, check the verticality with a bubble level.

  4. Locks are held together with silicone.
  5. Special auxiliary platforms are used for the roof.
  6. Installation of styles is carried out after the installation of walls and roofing is completed.

Garage cladding can take place in any weather. It is only necessary to comply with the temperature conditions of the manufacturers of sealants and polyurethane foam.

Maintenance of a garage made of sandwich panels

Rooms made of panels are highly durable, but also require regular inspection and maintenance :

  • Several times a year, the walls and roof are inspected for cracks and deformations,
  • avoid heavy impacts to avoid dents.
  • It is forbidden to fasten heavy equipment to walls.
  • It is necessary to install a drain in the roof; in the cold season, constantly clean it from snow.
  • Wash the cladding regularly to remove dirt.
  • If chips or cracks are found, they should be covered with anti-corrosion paint