Garlic is a pungently odoriferous member of the allium family (like onions and leeks). Garlic is generally used as a spice or a seasoning rather than as a vegetable due to its extremely strong flavour. Garlic grows in large papery heads. A novice mistake is to massively overgarlic things by following instructions incorrectly. Remember that the large bulb of garlic you buy is NOT one 'clove'. The whole garlic is called a 'head' or 'knob'.
Bumblebees do not damage brickwork or wood. Some of the bumblebees which make smaller nests, Bombus pratorum and B. hortorum do sometimes chose strange places to nest. Their nests are small and in the case of B. pratorum are usually very short lived.
Some will also nest under structures such as sheds. They do not like to nest in areas with prolonged exposure to the sun as this can heat the nest too much. Bumblebee nests vary in size depending on the species and time of year. A well-established nest may contain up to 400 bees.