GDC Mobilgaraz

What to know about steel garages

The key questions before buying, from construction to assembly.

Topics at a glance
  1. Comparison
    Steel, concrete and masonry compared.
  2. Delivery and assembly
    From enquiry to finished garage.
  3. Sizing
    Reference values for the right size.
  4. Ground preparation
    Three methods for the foundation.
  5. Material
    Sheet metal or PIR sandwich panels.
  6. Colours
    RAL colours and wood décors.
  7. FAQ
    Answers to the most common questions.

Steel vs. concrete vs. masonry

The three most common garage types compared.

Cost (excl. foundation)
Steel garage
from approx. €2,000
Prefab concrete garage
from approx. €4,000
Masonry garage
from approx. €15,000
Assembly time
Steel garage
A few hours
Prefab concrete garage
Approx. 1 hour (crane placement)
Masonry garage
Several weeks
Lifespan
Steel garage
20 to 40 years
Prefab concrete garage
Up to 30 years
Masonry garage
Over 50 years
Delivery access
Steel garage
Minimal — parts are carried in
Prefab concrete garage
Heavy lorry and crane required
Masonry garage
Standard construction site access
Relocatable and removable
Steel garage
Yes
Prefab concrete garage
No
Masonry garage
No

Delivery and assembly

From enquiry to finished garage.

  1. Enquiry and quote

    In the first conversation, dimensions, roof type, colour, gate and accessories are discussed. A free, no-obligation quote follows.

  2. Order confirmation

    Once the quote is confirmed, the garage goes into production. A delivery date confirmation follows, with no deposit required.

  3. Prepare the foundation

    While the garage is in production, the foundation is prepared. GDC provides a precise dimensional sketch and advice on ground preparation.

  4. Delivery and assembly

    On the agreed date the garage is delivered and assembled on the foundation. Assembly is usually completed within a few hours; payment is due only afterwards.

Choosing the right size

Reference values for width and length by intended use.

  • 3 bis 4 m

    Single garage

    Space for one vehicle. From 3 m wide; for SUVs or vans at least 3.5 m. Length from 5 m, for estates and large vans from 6 m.

  • 5 bis 6 m

    Double garage

    Space for two vehicles side by side. From 5.5 m wide so both doors can open. Also usable as a garage with a storage area.

  • 7 bis 8 m

    Large garage

    Space for three vehicles, or a garage with workshop or storage. Up to 8 m wide and 6 m long.

Ground preparation

Three methods for the foundation.

  • Concrete slab

    Concrete slab

    The slab overhangs the garage by 10 cm on every side, so for a 3×5 m garage that means a 3.20×5.20 m slab. Slab thickness at least 10 cm.

  • Strip footing

    Strip footing

    Strip width at least 20 cm, with the garage outline running down the centre. The footing's base must sit below the local frost line. The required depth depends on soil and groundwater at the site.

  • Concrete blocks

    Concrete blocks

    Blocks at the corners and at regular intervals along the perimeter. The number depends on the garage size.

Material and construction

The load-bearing steel frame is the same in both versions – the choice is the walls and roof.

Load-bearing frame of galvanized, closed steel sections: wall profiles 30 × 40 and 30 × 50 mm, roof structure 40 × 60 mm. Walls and roof come in two versions:

Sheet metal
Trapezoidal sheet, T-6 on the walls and T-13 on the roof, with anti-condensation felt beneath the roof covering. Without insulation.
PIR sandwich panels
Insulated version for walls and roof, available in 4, 6, 8 and 10 cm.

Colour palette

RAL colours and wood décors, glossy or matte.

RAL colours

Every RAL colour is available glossy or matte.

  • RAL 7016
    Anthracite grey
  • RAL 9005
    Jet black
  • RAL 9006
    White aluminium
  • RAL 9010
    Pure white
  • RAL 7035
    Light grey
  • RAL 8017
    Chocolate brown
  • RAL 3009
    Oxide red
  • RAL 6005
    Moss green
  • RAL 5010
    Gentian blue
  • RAL 8001
    Ochre brown
  • RAL 3000
    Flame red
  • RAL 1015
    Light ivory
  • RAL 6020
    Chrome green
  • RAL 7001
    Silver grey

Wood décors

  • Golden oak
  • Dark walnut
  • Winchester
  • Multigross

Frequently asked questions

Delivery times

Ground

Assembly

Contact

For general questions about products, delivery and assembly.

  • No deposit
  • Delivery in a few weeks
  • Individually configured
  • Delivery and assembly included
info@gdcmobilgaraz.pl+48 789 653 095