WorksheetsL2 Cavity wall - Cold bridging, cavity trays, lintels
Total questions: 13
Worksheet time: 13mins
What type of concrete block would you use, if you wanted to improve the thermal properties of a cavity wall?
Dense
Trench
Aerated
Fibolite
Where does 'Cold Bridging' normally occur?
Foundation
Internal partition wall
In the mortar
Windows and doors
What materials can be used to prevent 'Cold Bridging'?
Cavity Closures and Insulated DPC
Wall ties and insulation clips
DPC and DPM
Lean concrete mix
Sand blinding sits on top of hard-core when building a solid concrete floor?
True
False
Does an air brick require a cavity tray installed above it?
No
Yes
What is the maximum distance weep holes should be bedded in when installing a cavity tray?
400mm
425mm
450mm
475mm
Identify the cavity tray situation image.
Suspended Block and beam floor
Meter box
Window reveal
Solid concrete floor
Identify the cavity tray situation image.
Suspended block and beam flood
Meter box
Solid concrete floor
Window reveal
Identify the cavity tray situation image.
Suspended block and beam floor
Meter box
Solid concrete floor
Window reveal
Identify the cavity tray situation image.
Suspended block and beam floor
Meter box
Solid concrete floor
Window reveal
What's the minimum seating on a lintel?
100mm
125mm
150mm
175mm
What type of lintel is usually used for internal single skin walls?
Steel
Timber
Stone
Concrete
What tool would be used to locate wall ties in a cavity?
Metal detector
Angle grinder
Lump hammer and bolster
Stihl saw
