Die Türklinke ist kalt, weil der Rollladen die ganze Nacht offen geblieben ist.

Weil means because and introduces a subordinate clause.

In German, a subordinate clause usually sends the conjugated verb to the end. So:

• Die Türklinke ist kalt = main clause
• weil der Rollladen die ganze Nacht offen geblieben ist = subordinate clause

That is why you get:

• ... weil ... geblieben ist

and not:

• ... weil ... ist geblieben

In standard German, the verb-final order after weil is the normal written form.

This is because of the subordinate clause introduced by weil.

In a normal main clause, the perfect tense would be:

• Der Rollladen ist offen geblieben.

But after weil, the verb goes to the end, and with a two-part verb form in the perfect tense, both parts move there:

• ..., weil der Rollladen offen geblieben ist.

So:

• main clause: ist geblieben
• subordinate clause: geblieben ist

This is the Perfekt tense of bleiben.

The infinitive is:

• bleiben = to stay / to remain

Its perfect tense is formed with sein, not haben:

• ist geblieben = has stayed / has remained

So:

• offen geblieben ist means has remained open

Many verbs that describe a change of state or position, or movement, use sein in the perfect tense. Bleiben is one of them.

Offen means open as a state or condition.

Geöffnet is the past participle of öffnen and often means opened.

In this sentence, offen geblieben is the natural choice because the idea is:

• the shutter remained open

not specifically:

• someone opened it

So:

• offen geblieben = stayed open / remained open
• geöffnet geblieben would sound less natural here

German often uses an adjective like offen after verbs such as sein, bleiben, or stehen.

German often uses the accusative of duration to express how long something lasts.

So:

• die ganze Nacht = the whole night / all night

There is no need for a preposition like for.

Other examples:

• Ich habe den ganzen Tag gearbeitet. = I worked all day.
• Sie hat die ganze Woche gelernt. = She studied all week.

So in your sentence, die ganze Nacht tells you the duration of the shutter being open.

These are simply the grammatical genders of the nouns:

• die Türklinke = feminine
• der Rollladen = masculine

As in all German nouns, the article has to match the noun’s gender.

It helps to learn each noun together with its article:

• die Türklinke
• der Rollladen

That way, you will also know how to use them later in other cases.

Türklinke means door handle.

It is a compound noun:

• Tür = door
• Klinke = handle / latch

So literally it is something like door handle.

German makes compounds very freely, and the final part usually tells you the basic thing:

• die Klinke is the main noun
• Tür- specifies what kind of handle it is

That is also why the whole compound is feminine: Klinke is feminine.

A Rollladen is usually an exterior rolling shutter or roller shutter, common on windows in German-speaking countries.

It is not exactly the same as:

• Vorhang = curtain
• Jalousie = blind
• Fensterladen = shutter

A Rollladen typically rolls up and down outside the window. In this sentence, the idea is that it stayed open all night, which probably made the area colder.

Because here they are predicative adjectives, not adjectives directly before a noun.

Compare:

• die kalte Türklinke = the cold door handle
  
  • here kalte comes before the noun, so it takes an ending

But:

• Die Türklinke ist kalt. = The door handle is cold.
  
  • here kalt comes after ist, so it has no ending

The same applies to:

• der offene Rollladen = the open shutter
• Der Rollladen ist offen. = The shutter is open.

So in your sentence, kalt and offen stay unchanged.

Because offen ist and offen geblieben ist are not exactly the same.

• offen ist = is open
• offen geblieben ist = has stayed open / remained open

Using geblieben adds the idea that the shutter was open and continued to be open for that whole time. It emphasizes that it was left that way.

So:

• Der Rollladen ist offen. = it is open now
• Der Rollladen ist die ganze Nacht offen geblieben. = it stayed open all night

In standard written German, yes: weil normally introduces a subordinate clause with the verb at the end.

So the standard form is:

• ..., weil der Rollladen die ganze Nacht offen geblieben ist.

In informal spoken German, some native speakers sometimes use main-clause word order after weil, especially in conversation. But for learners, the safest and most correct rule is:

• after weil, put the verb at the end

Yes, but the structure would change.

With denn meaning because / for, the clause keeps normal main-clause word order:

• Die Türklinke ist kalt, denn der Rollladen ist die ganze Nacht offen geblieben.

With weil, the clause is subordinate:

• Die Türklinke ist kalt, weil der Rollladen die ganze Nacht offen geblieben ist.

Both are possible, but weil is very common and often sounds more natural in everyday German.

This is more about real-world usage than grammar. In German-speaking countries, Rollläden are very common, and whether they are open or closed can affect insulation, temperature, light, and airflow.

So the sentence is grammatically straightforward: the cold door handle is explained by the fact that the Rollladen stayed open all night.

Even if the exact physical logic depends on context, the German structure itself is perfectly normal.