Isolated garden house made of metal and plastic. Which manufacturer?

Hello,
I am looking for an insulated garden shed/tool shed made of metal or plastic.

Preferably made from these PUR sandwich panels in RAL 7016 - anthracite gray. Dimensions: 5 x 3 meters.
The shed should be low-maintenance. Therefore, wood is initially not an option for us.

We understand that these sheds are significantly more expensive than these wooden garden sheds/tool sheds.

Who knows some manufacturers of these sought-after sheds?

Or can some sheds be insulated afterwards? How have you solved this problem?

Thank you very much for the advice.

Best regards

Gladly made from these PUR sandwich panels in RAL 7016 - Anthracite grey. Dimensions: 5 x 3 meters. The house should be low-maintenance. Therefore, wood is initially not an option for us.

What is supposed to happen with the house? In other words, the purpose of the hut or why it needs to be insulated? You can also insulate a simple wooden hut from the outside.

I want to store flowers in it during the winter. Additionally, I will install a frost guard in it. Furthermore, bicycles, lawnmowers, garden tools, and other equipment are to be stored in it. A wooden house is not an option for us because a wooden house needs to be painted about once a year. Besides, houses made of plastic or metal have a nicer design. The selection of manufacturers for individual metal houses (made of PUR sandwich panels) or plastic houses seems to be very limited. Who therefore still knows manufacturers or companies that produce these insulated garden sheds/tool sheds?

We are aware that these houses are significantly more expensive than these wooden garden houses/sheds.

I was just at gartenxxl yesterday. The metal huts were considerably cheaper than the wooden huts.

Hello,
the company Biohort offers something like that. The model series "Casanova" consists of 40 mm sandwich panels with steel sheet on the outside. However, the roof is not insulated, but that can easily be done afterwards. Without roof insulation, it is NOT frost-free!

They offer all kinds of options for that, even complete wall panels made of insulating glass. They do not call it a garden house but an outbuilding. That fits as well...
The prices, however, are more than just high; for a 3*3 m house you can easily reach 10,000 € with a few extras.
We bought it used as a display piece, then we were within the "normal" price range....

Best regards,

Andreas

I know, Biohort is overpriced.

So far I have received one offer - 5 x 3 meters approx. 7.5 thousand EUR.