Glazing

Question 1

Define Glazing

Answer 1

Glazing is described as outside glazing when the glass is inserted from outside and inside glazing when the glass is inserted from the
inside

Question 2

Constitution of Glazing

Answer 2

Most glass is soda ash/lime/silica-based with the addition of a small percentage of magnesium and aluminium oxides and colouring agents

Question 3

Regulations and Safety Glass

Answer 3

• Any pane of glass less than 300mm from FL shall be 6mm thick or saftey glass
• Panes in doors shall not be less than 6mm thick and not exceed 1m²
• Clearance all around between 2-3mm

Pane Sizes: 0.75m²| 1.50m² | 2.10m² | 3.20m²

Question 4

Annealed Glass

Slowly Cooled

Answer 4

1. Clear Float
2. Patterned
3. Wired
4. Solar Control
5. Roughcast
6. Opal

Question 5

Toughened Glass

Chemically heat-treated; Internal tension, external compression

Answer 5

1. Tempered
2. Laminated
3. Insulating
4. Low Emissionary
5. X-Ray Lead Glass
6. Fire Resistant

Ideal for bolted structural glazing and frameless applications

Question 6

Other Types of Laminated Glass

Answer 6

1. Solar Control
2. Sound Control
3. Ultraviolet Light Control
4. Anti-Bandit
5. Bullet Resisant
6. Blast Resistant

Question 7

Glazing Installation Techniques

Answer 7

• Steel - Putty, Metal cover strip
• Plastic/uPVC - Rubber seal, Drain, Glazing bed
• Wood - Wood bead and Putty
• Alluminium - Rubber seal, large sloping drain

Question 8

Alternatives to Putty

Answer 8

• Neoprene Gasket (3-5mm clearance)
• Teak Putty (For wood frames)

Question 9

Installation

Answer 9

1. Back Putty/gaket under and behind window frame 2-3mm thick
2. Making sure the putty covers the rebate and underside of beads
3. Apply front putty and cut if off around 2mm bellow the sight line of the rebate
4. Apply paint or finish as desesired, making sure to cover the putty and/or beads to avoid drying out and cracking

Putty for saftey/solar glass to be of the non-hardening type