Combination of shed roof and flat roof

Good evening,

Construction expert, can you briefly explain why a combination of a hip roof and flat roof would be so much cheaper than the combination of a shed roof and flat roof?

I wouldn’t want to say “so much,” but it is definitely cheaper.

The example you uploaded requires careful sealing, including creating a 2° slope on the flat roof. For the shed roof, there are additional costs for the extra masonry, possibly insulation, plaster, and a different attachment of the roof covering; possibly windows on the higher side.

In the hip roof/flat roof combination, the more complex construction of the shed roof is eliminated; also, the hip roof—if you choose a roof pitch above 22°—can be built in a classic way. If you don’t need the floor created underneath for storage, you can additionally resort to a truss roof; this results in further savings. Depending on the roof size, you can save a good EUR 10,000.

Expressing this in percentages won’t help you because it cannot be applied to all providers.

Rhenish regards

Hello,

... Originally my girlfriend really liked a city villa, at the beginning I was very into the Bauhaus style. After some time we agreed on a look that we both liked (at that point it was purely about the appearance). It should be a shallow pitched shed roof with cubic elements....

That is usually a very advantageous building construction from various perspectives!!!
Basically: The lower the roof pitch, the higher the demands on the statics and the "waterproofing".
The statics of roof constructions, e.g. rafter height and axis spacing, load bearing, are nowadays determined more by thermal necessities (insulation between rafters) than by pure statics, for example in gable roofs!

....he is an independent roofer himself and said from his point of view 6 degrees don’t make much sense....

He is right about that. Roof pitches from 15 to 25° are safely managed without significant additional effort!

....- Currently there are not many such designs. Is this because it doesn’t make sense technically or because it doesn’t suit many people’s taste? I could live with the latter

Neither. Often development plans significantly restrict personal wishes!
Sometimes the size and color of the mailbox or fence is prescribed! What city planners think with such demanded uniformity is beyond me. A disaster! The eye lives overall from variety, not from these single-family house barracks!
On the other hand, of course it is clear that lobbyists (BT, GU, GÜ) have usually influenced this!

....According to the development plan it should not be a problem to put such a house there.

What’s stopping you? Need help => PM!

Best regards

Yvonne's house corresponds to the classic shed roof construction, with 2 different knee wall heights; so no rocket science.

Rhenish greetings

I was told when searching for construction companies that there is indeed extra effort involved, meaning the connection of the roof to the gable, and generally the structure of the shed roof/additional gable. The prices confirmed that.

PS: According to the development plan, it should not be a problem to place such a house there.

If a shed roof and a flat roof exist in the neighborhood, this does not necessarily mean that a combination will be approved!!! It is at the discretion of the municipal/city councils and then at the discretion of the building regulatory authority.

Thank you very much for your feedback. Regarding the development plan: I will definitely clarify that, but for now it was more about whether there is anything technically speaking against this roof shape. Do you think it makes sense to approach the big prefab house providers (timber frame) with such "extra wishes"? I can well imagine that such a roof shape leads to disproportionate surcharges, or is that a prejudice? Since my uncle is a roofer, he would of course also like to do the roof for us. Do you both think it is possible for the prefab house provider to exclude the roof from the package? I can't really imagine that...

.... I can well imagine that such a roof shape leads to disproportionate surcharges, or is that a prejudice?...

How one comes to such a prejudice is absolutely beyond me!

v.g.