Other external wall finishes

Question 1

Functional requirements for other wall finishes

Answer 1

Question 2

Planting materials/finishes that are problematic, and raise concerns needing further investigations, include:

Answer 2

Question 3

Other parts of building construction also have a significant impact on risk, these include:

Answer 3

Question 4

Finishes and their types:

Answer 4

-Tile hanging (or vertical tiling)
– slate hanging
-cladding boards, to include: timber cladding, manufactured/composite cladding boards (PVCu cladding boards, plastic/resin based cladding boards, fibre cement boards)
-Brick slips/thin stone cladding
-metal cladding: to include lead sheets and zinc sheets
– high-pressure laminate
– cedar shingles
– asbestos cement sheets
– aluminium composite material

Question 5

The background structure and things to consider:

Answer 5

– Movement/movement joints
– penetrations through finishes
– timber framed structures
– metal and concrete frame structures

Question 6

Some of the environmental factors that can affect building materials including can include:

Answer 6

– Temperature changes resulting in freeze/thaw cycles
– temperature changes causing expansion/contraction
– exposure to UV radiation
– long-term dampness
– wind imposed loads

Question 7

Common compatibility and integration problems relating to cladding include:

Answer 7

– Inappropriate fixings used
– flashings/weatherproof detail is not adequately provided/linked
- water draining out from background not dealt with correctly
- inclusion of barriers preventing water vapour passing out of building interior
- damp proof course is not continuous through whole structure
– structure more flexible which moves more than the cladding tinkles cracking

Question 8

Tile and slate hanging finishes

Defects and possible causes table 1

Answer 8

Question 9

Tile and slate hanging finishes

Defects and possible causes table 2

Answer 9

Question 10

Timber and composite plank cladding finishes

Defects and possible causes table

Answer 10

Timber boards

Question 11

Composite and plastic boards

Defects and possible causes table

Answer 11

Question 12

Fixings and tile battens etc

Defects and possible causes table

Answer 12

Question 13

Flashings and a large areas of lead

Defects and possible causes table

Answer 13

Question 14

Further investigation is required for external finishes are likely to relate to items such as:

Answer 14