Metal

Question 1

In sheet metalwork the word dressed describes what?

Answer 1

The shaping of the sheet

Question 2

Where the lead flat roof is surrounded on all sides by parapet walls, where do we collect the rainwater?

Answer 2

At the lowest point on the roof

Question 3

What is a wood roll in a lead flat roof?

Answer 3

A Wood Roll is used to provide a watertight expansion joint between two separate sheets of Lead.

Question 4

The usual thickness of copper sheet for roofing is what?

Answer 4

0.6mm

Question 5

The standard size of sheet for copper roofing are what two sizes (L x W)?

Answer 5

1. 1200 x 900mm

2. 1800 x 900mm

Question 6

The minimum fall for a copper covered roof is what?

Answer 6

1 in 60 ( firming pieces used to create fall)

Question 7

What is the cheapest metal used for roofs?

Answer 7

Zinc

Question 8

Name two materials that have been used as a waterproof membrane for timber framed roofs?

Answer 8

1. Asphalt - as a continuous membrane

2. Bitumen felt - laid in layers to form a membrane or skin.

Question 9

Bitumen felt is generally used on what type of roofing?

Answer 9

Flat