Possible Clues:

• Masonry bond
• Bricklaying material
• Bricklayer's material
• Small cannon or building material
• Sounds as if the builder could need a further amount of pitch for this
• A short cannon for firing shells
• Used in building a house - or to destroy one
• In the building one gets a pound from 1 down
• Sounds as if this provides additional pitch for the building
• Lime mixture; a cannon