Cavity walls-Forming an opening

What is the main purpose of a cavity wall?

• To increase structural strength
• To prevent damp penetration and improve insulation
• To provide aesthetic appeal
• To reduce building costs

What is the minimum bearing length required for steel lintels in cavity walls?

• 100mm
• 200mm
• 150mm
• 250mm

Which material is commonly used for the outer skin of a cavity wall?

• Timber
• Block
• Face brickwork
• Steel

What is the function of a DPC (Damp Proof Course)?

• To support the frame of windows and doors
• To act as insulation
• To prevent the passage of damp
• To improve structural integrity

Which type of lintel is lighter and often includes insulation?

• Concrete lintel
• Timber lintel
• Steel lintel
• Stone lintel

What is the purpose of weep holes in cavity walls?

• To allow air circulation
• To drain water from the cavity
• To provide structural support
• To increase insulation

What is a cavity closer used for?

• To hold cavity wall insulation in place
• To prevent water, damp, and heat loss
• To support the weight of bricks above openings
• To reinforce the cavity wall structure

What is the term for the groove under a window sill that prevents water penetration?

• Weep hole
• DPC
• Drip or throating
• Cavity closer

What is the primary function of a brick-on-edge sill?

• To improve aesthetic design
• To support window frames
• To direct rainwater away from the wall
• To provide insulation

At what intervals should weep holes typically be positioned?

• 300mm
• 450mm
• 600mm
• 750mm