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Year	Roof coverage	% change
2008	145.2	+4%
2009	152.7	+5%
2010	157.3	+3%
2011	162.1	+3%
2012	168.3	+4%

Pitched roofing	听
Concrete tiles	23.8
Slate	12.7
Clay tiles	4.5
Total	41.1
Flat roofing	听
Felt	22.6
Single-ply PVCu	3.9
Asphalt	2.1
Total	28.6
Metal roofing	听
Steel	62.8
Aluminium	6.6
Total	69.4
GRAND TOTAL	139.1

Single-ply membrane	95-112
Natural slate	150 -190
Aluminium standing-seam	90 -120
Two-coat asphalt	150 -190
High-performance bitumen felt	100 -120
Stainless steel standing seam	120 -160
Clay tiles	65 - 90