The roof is one of the biggest investments you'll make in your home. Find out how the costs of installation of a new roof and repairs on existing roofs are determined.
Size: Roofers will calculate the exact size and dimensions of your roof to best estimate the amount of materials needed.
Slope of your roof: The steeper your roof is, the more materials will be needed to cover it.
Materials: The price for materials will depend on what kind of roofing materials you choose to have installed.
Roof access: If your roof is difficult to access, or if it is multiple stories, contractors may charge more.
Difficulty level: If your project is complex - for example, if you have chimneys, skylights and vents that roofers need to work around - the higher the cost could be.
Location: Where you live could determine your estimate.
See this article here & credit goes to http://www.news8000.com/lifestyle/how-are-roofing-costs-estimated/221573408
local.which.co.uk contacted Which? Local-recommended traders to find out how much standard jobs should cost and how quickly they should be completed. Armed with this information, you’ll feel confident about hiring traders and be better equipped to spot when things aren't right.
local.which.co.uk surveyed recommended roofers to find out how much you should spend on 13 common jobs and how long they should take to complete.
Trader tip: scaffolding
If extensive work is taking place on a property above one storey high then it’s likely that scaffolding will be required.
Scaffolding is expensive, and takes hours to put up and take down. This will increase the price of quotes.
In July 2012, we sent a survey to all Which? Local traders in the Roofers category with a rating of three stars or more and an email address.
20 roofing professionals responded to the survey. Using their experience and expertise, they answered questions about the cost of popular roofing jobs, and how long they should take to complete.
|Job||Details||Typical price quoted||Price range||Typical time to complete job|
|Survey conducted in July 2012|
|Replace fascias and soffits on a typical three-bed detached bungalow||Remove wooden fascias and soffits. Replace with uVPC. Includes cost of labour and materials. Assuming no scaffolding needed.||£1,900||£1,250-£2,225||2–5 days|
|Replace fascias and soffits on a typical three-bed detached, two-storey house||Remove wooden fascias and soffits. Replace with uVPC. Includes cost of labour, materials and scaffolding.||£2,425||£1,625-£3,000||2–5 days|
|Replace lead flashing on chimney||n/a||£340||£300-£450||1 day|
|Fix leaking roof on a two-bed bungalow||Replace approx six roof tiles.||n/a||£80-£189||1-3 hours|
|Fix leaking roof on three-bed, semi-detached, two storey house||Replace approx six roof tiles.||n/a||£88-£200||1–3 hours|
|Replace whole roof on a two-bed bungalow – plain tiles||Remove existing tiles, fit new plain tiles. Includes cost of labour, materials and scaffolding.||£4,500||£3,850-£5,875||4-6 days|
|Replace whole roof on a three-bed, semi-detached, two-storey house – plain tiles||Remove existing tiles, fit new plain tiles. Includes cost of labour and materials.||£5,600||£4,500-£7,000||6–10 days|
|Replace whole roof on a four-bed, detached, two-storey house – plain tiles||Remove existing tiles, fit new plain tiles. Includes cost of labour and materials.||£6,750||£5,500-£8,750||10–14 days|
|Replace whole roof on a two-bed bungalow - slate||Remove existing slate and replace with new.||£4,800||£4,000-£6,000||5–10 days|
|Replace whole roof on a three-bed, semi-detached, two-storey house – slate||Remove existing slate and replace with new.||£6,250||£5,000-£7,500||8–12 days|
|Replace whole roof on a four-bed, detached, two-storey house – slate||Remove existing slate and replace with new.||£8,250||£6,500-£12,000||10–20 days|
|Flat roof on typical single garage||Put a flat roof on existing single garage - rubber membrane.||£900||£840-£1,150||1 day|
|Flat roof on conservatory||Put a flat roof on a conservatory measuring approx 10'10” x|
This has been taken from https://local.which.co.uk/advice/cost-price-information-roofers-roofing-jobs