If blisters do form, what should you do to the trowel blades and what kind of float should you reopen the surface with?

If blisters do form, what should you do to the trowel blades and what kind of float should you reopen the surface with?

• A. Flatten, wood
• B. Smooth, steel
• C. Polish, plastic
• D. Clean, foam

Answer: (A)

When blisters appear, the goal is to stop sealing the surface further and reestablish a surface that can breathe and level out. Flattening the trowel blades removes the ridges and heavy cutting that push material into the surface and create uneven, blister-prone texture. After you’ve reflattened, reopen the surface with a wood float. A wood float is gentle and creates a light, open texture that blends the surface without over-compacting or sealing it, which helps trapped moisture escape and reduces blistering. Using a harder, more aggressive tool (like steel) can push the surface to become harder and more prone to blistering, while other materials won’t provide the same open, breathable texture.

When blisters appear, the goal is to stop sealing the surface further and reestablish a surface that can breathe and level out. Flattening the trowel blades removes the ridges and heavy cutting that push material into the surface and create uneven, blister-prone texture. After you’ve reflattened, reopen the surface with a wood float. A wood float is gentle and creates a light, open texture that blends the surface without over-compacting or sealing it, which helps trapped moisture escape and reduces blistering. Using a harder, more aggressive tool (like steel) can push the surface to become harder and more prone to blistering, while other materials won’t provide the same open, breathable texture.