Q-Haus to Build a Unique Upside Down House
30. November 2017

An upside-down house was built in Tartu, Estonia year 2017. Q-haus has been involved in this project from the very beginning. Q-haus took care of the engineering design and made sure the whole building could be manufactured indoor using timber element technology. Today we are thrilled to receive the news that the construction of the house is finally approved by the Municipality.

The project has been very challenging due to the unique geometry of the house, but how difficult is to build a house that cheats gravity?

Upside Down House in Tartu. Photo: Q-haus Baltic OÜ

A building designed to cheat gravity

It is unusual to see a building like this. Upside down houses have been around for a while, mainly built as an attraction for tourists. This upside down house will be the main attraction of a new entertainment park to be built in south Estonia.

As a matter of fact, there are only 8 major upside down houses open to the public Worldwide:

  1. Die Welt Steht Kopf in Trassenheide, Germany
  2. Wonderworks in Orlando, Florida
  3. The Education and Region Promotion Centre in Szymbark, Poland
  4. The Upside Down Church, Vancouver, B.C., Canada
  5. White House, Batumi, Georgia
  6. Another Upside Down White House, Wisconsin
  7. House of Katmandu, Magalluf, Mallorca
  8. House Attack, Vienna, Austria

Note that some of these houses are not accessible and they are nothing more than elaborated sculptures. With this in mind, the “Upside Down House of Tartu” will probably become soon part of this popular list of must-see buildings.

Q-haus receive quite many questions concerning every aspect of this one-of-a-kind building. Here they share some of the most interesting facts about the upside down house.

Can you live inside?

Technically yes. The house was designed to meet regular building standards. It is no different from a real 149 m2 house, on two floors.
Inside you will find electricity, heating, ventilation systems. The only thing missing is water… but it could be easily added.

However, technical installations are not the only thing one should be concerned about. Inside the house, all the furniture is upside down: tables, chairs, garderobes, etc. are hanging from the floor over your head. Even the toilet stands upside down in mid-air!
That would be a pretty challenging way of living.

Is it also inclined?

Yes. The building is inclined by 7°, on both axes. As result of this architectural choice, no surface in the house is perfectly horizontal or vertical.

This particular geometry was chosen to create the illusion of “wrong gravity“. As a visitor in the house, your very ability of standing will be put to the test due to the combined effect of “wrong gravity” and “upside down” perception.

Inclination has been the main complexity factor on this project. In fact, while designing an inverted house is quite easy, it turned out that making it stand with leaning walls requires a lot of extra effort.
The inclination affected design work and it will affect construction works, especially concerning safety and time necessary for installing and securing the elements in their leaning position.

How does it stand?

To overcome the effect of gravity, engineers had to use a massive steel frame in the roof construction which is in contact with the ground. There are 299 steel bars composing the frame of the house, amounting to a total weight of over 12 tons. During construction, steelworkers had to perform over 600 connections using thousands of nuts and bolts.

Part of the roof will be embedded in the ground while the other side will be standing up in mid-air. The height of the building on its highest point will be over 9m.

The entrance of the house will be through the balcony door of the second floor, which has been conveniently located near to ground level and it is accessible via a normal stair.

What was the biggest design challenge?

Dealing with the calculations for the steel structure has been the biggest challenge our designers came to face. In usual constructions, most of the structural components are subject to vertical forces. In this building, due to the double inclination, all structural components are subject to 3D forces. This makes dimensioning of the structure unusually complex.

Once solved the structural challenge, designers had to deal with the solutions to protect the building from the weather. In fact, the foundation you see up in the air is the roof of the house. The roof is then flat and inclined and all the water gathering up there must be able to reach the ground without infiltrating the structure. This was solved rather easily with an inverted rainwater system collecting the water up in the foundations (roof) and bringing it to the roof (foundation).
The major challenge concerning water resistance has been to find a good solution for preventing the water entering from windows. This is usually achieved by using metal sills on the bottom of the windows… but here windows are upside down, so the sills are actually on the top and the water drips down into the sill itself making it very complicated to protect the walls.
Engineers solved the problem by using small gutters embedded into the sills and implementing a double sills system.

The building now is 100% gravity-safe and weather-safe.

This project has been an interesting challenge for Q-haus designers. Their Project Manager was also actively involved in during the design phase to make sure that all aspects related to construction would be taken into account.

Building this object will be a step forward for the company and also will be a testimonial that great results can be achieved when creative minds are put to good use with a common goal.

More pictures of the construction process and the finished project can be found on Q-haus reference page.

Source: Q-haus news