David Holmes, associate at AECOM, provides an overview of roofing costs
What type of roof covering to use is influenced by the pitch of the roof. One with a shallow pitch, below 30º of slope, will require consideration as to which type of roof covering to use. Commonly, roof tiles allow for a shallower pitch, sometimes as low as 12.5º for certain makes compared to 20 – 22.5º for selected slates.
The most common type of roofing tiles are made from cement or clay and are a popular choice particularly for modern homes. Cement tiles are cheaper, costing around 70p compared to a clay tile which is priced at around £1.20.
The difference in price reflects the durability of the tile. Cement tiles normally last between 40 and 50 years but clay are longer lasting, giving 50-100 years of wear.
Slate is often found on period or traditional homes. Its colour and texture, created by layering, provides an attractive aesthetic. Compared to tile roofs, natural slate has a longer lifespan, lasting 120 years or more. It is also more expensive, as more slates will be needed to cover the roof.
Taking care of any roof generally involves a yearly check-up looking for any damaged or missing tiles. Keeping gutters clear is also important.
The rates below are a guide to roofing costs as at 2018 Q2. No allowance is made for sundry or related preliminaries. VAT is excluded.
Pitched roof: Sheet metal
Includes breather membrane, underlay or vapour barrier as necessary; excludes roof structure
Copper sheet; mill finish; flat seam or wood rolled £190-235
Copper standing seam roof; mill finish £180-225
Extra for pre-patinated copper finish £40-70
Aluminium sheet; mill finish; wood roll; insulation (U-value = 0.25WK) £80-135
Aluminium sheet; standing seam; mill finish; insulation (U-value = 0.25WK) £80-140
Extra for Pvf2 aluminium finish £10-20
Stainless steel; terne coated sheet £170-200
Lead roof covering; code 7; welded seam; milled lead; laid flat £160-180
Lead roof covering; code 7; welded seam; milled lead, pitched roof £160-200
Zinc; Natural Bright Rheinzink; pitched £120-150
Extra for pre-weathered zinc £20-30