15 If it is burned up, the builder will suffer loss but yet will be saved—even though only as one escaping through the flames.

Read 1 Corinthians 3:15 Using Other Translations

If any man's work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire.
If anyone's work is burned up, he will suffer loss, though he himself will be saved, but only as through fire.
But if the work is burned up, the builder will suffer great loss. The builder will be saved, but like someone barely escaping through a wall of flames.