De or het zolderbetimmering?

The correct Dutch article is:

de zolderbetimmering

Rule Words ending in -ing: almost always de. See the rule

How to use zolderbetimmering

the zolderbetimmeringde zolderbetimmering
this zolderbetimmeringdeze zolderbetimmering
that zolderbetimmeringdie zolderbetimmering
our zolderbetimmeringonze zolderbetimmering
your zolderbetimmeringjouw zolderbetimmering
every zolderbetimmeringelke zolderbetimmering
which zolderbetimmering?welke zolderbetimmering?
a big zolderbetimmering / the big zolderbetimmeringeen grote zolderbetimmering, de grote zolderbetimmering