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flat roof
سطح مسطح
techo plano
سقف صاف
toit plat
समतल छत
tetto piano
平らな屋根
płaski dach
telhado plano
acoperiș plat
плоская крыша
düz çatı
плоский дах
平屋顶

das  Flachdach
B2
Estimated CEFR level.
/ˈflaxˌdax/

🏠 What Exactly is a Flachdach?

A Flachdach is a type of roof that has no slope or only a very slight slope (typically less than 10°, often even below 5°). In contrast to pitched roofs (Steildächer) like gable (Satteldach) or hip roofs (Walmdach), it has no sloping surfaces.

It is frequently used for modern residential buildings, office buildings, industrial halls, and garages. Waterproofing against rainwater is particularly important for this type of roof.

🚨 Important: It's always das Flachdach (neuter gender).

📚 Grammar Spotlight: Das Flachdach

The word "Flachdach" is a noun of neuter gender (Neutrum).

Declension (Case Endings)

Singular
CaseArticleNoun
Nominative (subject)dasFlachdach
Genitive (possessive)desFlachdach(e)s
Dative (indirect object)demFlachdach
Accusative (direct object)dasFlachdach
Plural
CaseArticleNoun
NominativedieFlachdächer
GenitivederFlachdächer
DativedenFlachdächern
AccusativedieFlachdächer

Example Sentences

  1. Unser neues Haus hat ein modernes Flachdach. (Our new house has a modern flat roof.)
  2. Die Abdichtung des Flachdaches muss regelmäßig überprüft werden. (The waterproofing of the flat roof must be checked regularly.)
  3. Auf dem Flachdach wurde eine Solaranlage installiert. (A solar panel system was installed on the flat roof.)
  4. Viele Industriegebäude haben große Flachdächer. (Many industrial buildings have large flat roofs.)

🏗️ When and How to Use "Flachdach"?

The term Flachdach is primarily used in the context of architecture, construction, and real estate.

  • Typical Contexts: Describing building types (e.g., Bungalow mit Flachdach - bungalow with a flat roof), discussing construction methods, pros and cons of different roof types, planning green roofs (Dachbegrünungen) or solar installations.
  • Advantages: Often cheaper to build, provides additional usable space (roof terrace, garden), easy installation of solar panels.
  • Disadvantages: Requires careful sealing and drainage, potentially higher maintenance costs, shorter lifespan of the waterproofing compared to tiles.
  • Distinction: It is clearly distinct from Steildächer (pitched roofs) like Satteldach (gable roof), Pultdach (shed roof), Walmdach (hip roof), etc., which have a noticeable slope.

🧠 Mnemonics to Remember

Article Mnemonic: Think of "das Dach" (the roof). It's neuter. Even if it's flat (flach), it stays "das". "Das flache Dach" = das Flachdach.

Meaning Mnemonic: Imagine a roof so flat you could have a picnic on it. A flat roof is a Flachdach. The word "flach" sounds like "flat".

↔️ Opposites and Similarities

Synonyms (Similar Meaning)

  • (No direct, common synonyms)
  • Descriptions: Roof without slope, horizontal roof
  • Specific types: Gründach (green roof, if vegetated), Terrassendach (roof terrace, if used as such)

Antonyms (Opposites)

  • Steildach (pitched roof)
  • Satteldach (gable roof)
  • Walmdach (hip roof)
  • Pultdach (shed roof / lean-to roof)
  • Mansarddach (mansard roof)

⚠️ Caution: A Pultdach (shed roof) has only one sloping surface, but by definition, it is not a Flachdach because it has a distinct slope.

😄 A Little Roof Joke

German: Warum hat der Architekt sein Flachdach begrünt? Damit es nicht so flach wirkt!

English: Why did the architect put plants on his flat roof? So it wouldn't seem so flat! (Pun on "flach" meaning both "flat" and "shallow/vapid")

✒️ Poem about the Flachdach

German: Oben auf dem Haus, ganz breit, liegt's in moderner Zeit. Keine Ziegel, keine Neigung spitz, das Flachdach ist der letzte Witz?

Nein, es bietet Raum und Platz, für Grün und Sonnen-Schatz. Gut gedichtet, muss es sein, sonst dringt der Regen ein!

English Translation: On top of the house, quite wide, it lies in modern tide. No tiles, no pointy slope in sight, is the flat roof just a silly plight?

No, it offers room and space, for green and sunny grace. Well-sealed, it must truly be, or rain will enter, you see!

❓ Riddle Time

German: Ich kröne das Haus, doch bin nicht spitz,
habe kaum Gefälle, das ist kein Witz.
Manchmal bin ich grün, manchmal grau und schlicht,
brauche gute Dichtung gegen Wasser dicht.

Was bin ich?

English: I crown the house, but am not peaked,
I have little slope, no joke is speaked.
Sometimes I am green, sometimes grey and plain,
I need good sealing against the rain.

What am I?

Solution

Das Flachdach (The flat roof)

🧩 Word Components & Trivia

Word Composition

The word "Flachdach" is a compound noun, composed of:

  • flach (adjective): meaning 'flat', describing the low slope
  • das Dach (noun): meaning 'the roof', the top covering of a building

Trivia

Flat roofs were known in antiquity (e.g., in the Middle East), but only became popular in Central Europe with modern construction techniques and waterproofing materials in the 20th century, especially in the Bauhaus style.

📝 Summary: is it der, die or das Flachdach?

The word "Flachdach" is a neuter noun. The correct article is always das: das Flachdach (Nominative, Accusative), des Flachdaches (Genitive), dem Flachdach (Dative). The plural form is die Flachdächer.

🤖

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