Dipping is fully or partly immersing a building material in a liquid in order to saturate, preserve or coat it. It is an ancient technique still widely used in timber construction, metal finishing and stone restoration.
Different applications
Dipping is used in several ways:
Timber dipping
Beams, posts or laths are dipped in a bath of wood preservative. The liquid penetrates deep into the pores, protecting against fungi, insects and rot. Vacuum-pressure impregnation extends penetration further.
Brick dipping
Dry bricks are briefly dipped in water before being laid. This stops them drawing water out of the mortar, improving the bond.
Metal dipping
Steel can be submerged in a bath of molten zinc (hot-dip galvanising), creating corrosion protection. Phosphating baths used to pretreat steel also fall under dipping.
Stone dipping
In restoration work, porous stones are dipped in stone-hardening or hydrophobing liquids.
Advantages and points to consider
Dipping has advantages over spraying or brushing:
- Full coverage — even hard-to-reach areas are treated
- Deeper penetration — longer contact allows fuller absorption
- Even distribution — no missed spots
Points to consider:
- Drying time — dipped materials must drain and dry properly
- Safety — chemical treatments require protective equipment
- Waste handling — spent liquids are typically hazardous waste
Related terms
- Impregnation
- Hot-dip galvanising
- Hydrophobing
- Wood preservation
- Pre-wetting
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