בין אם קבלן השיפוצים יגיע היום ובין אם מחר, נתחיל באינסטלציה.

It means whether ... or ....

So:

• בין אם קבלן השיפוצים יגיע היום ובין אם מחר = whether the renovation contractor arrives today or tomorrow

This is a fixed Hebrew pattern used to present two alternatives while showing that the result in the main clause stays the same.

A very literal breakdown is something like:

• בין אם = whether
• ובין אם = or whether

Hebrew often repeats בין אם in both parts, unlike English, where we usually say whether ... or ... rather than whether ... or whether ....

Because that is the normal Hebrew structure:

• בין אם X ובין אם Y

This repetition makes the sentence sound complete and balanced.

For example:

• בין אם הוא יבוא ובין אם לא, נתחיל. = Whether he comes or not, we’ll begin.

In English, repeating whether can sound formal or heavy, but in Hebrew the repeated pattern is very standard.

Good question. The full underlying idea is:

• בין אם קבלן השיפוצים יגיע היום ובין אם יגיע מחר

But Hebrew, like English, often leaves out a repeated verb when it is easy to understand from context. So יגיע is omitted in the second part.

That makes the sentence more natural and less repetitive.

So:

• ובין אם מחר
  really means
• ובין אם יגיע מחר

This is very common in Hebrew.

It means the renovation contractor or the remodeling contractor.

Breakdown:

• קבלן = contractor
• השיפוצים = the renovations / the renovation work

Together, קבלן השיפוצים is a kind of noun-noun phrase meaning the contractor for the renovations.

In natural English, we usually turn that into:

• the renovation contractor
• the remodeling contractor

The ה־ is the definite article, meaning the.

• שיפוצים = renovations / renovation work
• השיפוצים = the renovations / the renovation work

In a phrase like קבלן השיפוצים, the second noun is definite, so the whole phrase is understood as definite:

• קבלן שיפוצים = a renovation contractor
• קבלן השיפוצים = the renovation contractor

This is a very common Hebrew pattern.

Yes, it is morphologically plural, and Hebrew often uses שיפוצים where English might say renovation, remodeling, or renovation work.

So although it looks like renovations, in actual usage it can refer to renovation work in general.

Examples:

• אני עושה שיפוצים בבית. = I’m doing renovations / remodeling the house.

So in this sentence, קבלן השיפוצים does not necessarily mean a contractor for multiple separate renovations. It just means the contractor handling the renovation work.

Because the sentence talks about something that has not happened yet.

• יגיע = he will arrive
• נתחיל = we will begin

Hebrew uses the future here just as English does in this kind of situation.

Also notice that after אם-type structures, Hebrew often still uses the future:

• אם הוא יבוא, נתחיל. = If he comes, we’ll start.

So בין אם ... יגיע ... נתחיל is perfectly normal.

Because the verb להתחיל often takes the preposition ב־ when it means to start with something.

So:

• להתחיל ב... = to begin with...

Examples:

• נתחיל בעבודה. = We’ll start with the work.
• נתחיל בארוחת ערב. = We’ll start with dinner.
• נתחיל באינסטלציה. = We’ll start with the plumbing.

Without ב־, it would sound unnatural here.

In everyday Hebrew, אינסטלציה usually means plumbing or plumbing work.

So נתחיל באינסטלציה means:

• We’ll start with the plumbing
• We’ll begin with the plumbing work

This is a common word in colloquial Hebrew, especially when talking about construction or home renovation.

The sentence starts with the whether clause because it sets up the condition/background first, and then gives the main action:

• בין אם ... ובין אם ..., נתחיל ...

This is similar to English:

• Whether he arrives today or tomorrow, we’ll start with the plumbing.

You could think of the first part as framing the situation, and the second part as the real main point.

The comma helps separate those two parts.

Not with exactly the same meaning and structure.

• אם by itself means if
• בין אם ... ובין אם ... means whether ... or ...

So:

• אם קבלן השיפוצים יגיע היום, נתחיל... = If the contractor arrives today, we’ll start...

That gives one condition.

But:

• בין אם קבלן השיפוצים יגיע היום ובין אם מחר, נתחיל... = Whether he arrives today or tomorrow, we’ll start...

That means the outcome is the same in either case.

So בין אם is the better choice when you want to say that both alternatives lead to the same result.

Yes. A more explicit version would be:

• בין אם קבלן השיפוצים יגיע היום ובין אם יגיע מחר, נתחיל באינסטלציה.

This repeats יגיע in the second half.

That version is also correct. The original sentence is simply more compact and natural because Hebrew often omits repeated material when it is obvious.

A simple pronunciation guide:

• Bein im kablan ha-shiputzim yagi'a hayom u-vein im machar, natchil be-instalatzya.

A few notes:

• בין אם = bein im
• השיפוצים = ha-shiputzim
• יגיע = yagi'a
• נתחיל = natchil

The stress is roughly:

• kaBLAN
• shi-puTZIM
• ya-giA
• maCHAR
• natCHIL
• in-sta-latSYA

It is mostly neutral standard Hebrew.

• בין אם ... ובין אם ... is a standard, educated structure.
• קבלן השיפוצים and אינסטלציה are normal everyday vocabulary in the context of home repair or renovation.

So the sentence sounds natural and correct, and it would work in speech or writing.