Breakdown of Solch ein Innenraum braucht viel Leder.
ein
a, an (eine)
brauchen
to need
viel
much / a lot
solch-
such
Questions & Answers about Solch ein Innenraum braucht viel Leder.
Why is it Solch ein without any grammatical endings on solch?
When solch comes right before the indefinite article (ein, eine, etc.), it drops its endings and stays uninflected as just solch.
Can I put the word for "such" after the article instead?
Yes! You can flip the word order. But if the word for "such" comes after the article, it behaves like a normal adjective and must take an ending. Because der Innenraum is a masculine noun in the nominative (subject) case, it becomes Ein solcher Innenraum.
How would you say this using the colloquial alternative so ein?
You would say So ein Innenraum braucht viel Leder. In everyday spoken German, so ein is much more common than the slightly formal solch ein.
Why does viel not have an ending in viel Leder?
Leder (leather) is treated as an uncountable material here. When viel (a lot of / much) is used with singular, uncountable nouns, it usually doesn't take any adjective endings.