Small trees sprouted from a thick roof of collected dirt, but the vertical walls were clear.

The box is constructed out of concrete and has an 18" thick roof and 15" think walls.

Think of the stone shingles of the roof eight inches thick!

The sunlight dappled down through the thick roof of leaves.

I would have to take the risk that the thick roof would muffle the sound.

Batten had crashed through the thick, leafy roof of a small woods.

Currents and wind would have moved the ice a few miles south as increasing summer temperatures weakened the thick white roof on the ocean.

So I built a thick wooden roof over my slit trench, to protect myself from flak.

Two smoking bunkers with thick concrete roofs stood on the left side of the opening, bigger than expected.

"You see, if we use the trees like this, their leaves will still grow and will make a fine thick roof," said Jack.