Basic felt solutions cost around 50 per square metre for the material itself and more high end materials such as modern grp a form of fibreglass going up to 90 per square metre.
Cost of replacing flat roof extension.
There are numerous flat roof applications which have varying costs including.
If you live in london you can expect to pay approximately 500 more.
So measure out your intended shape say 4 x 6 metres calculate the area which is 24 square metres and then multiply by 1 500 36 000.
In london and the south east this could be anywhere between 1 800 and 2 300 per m2.
However the price and timescale for the job could change in some circumstances.
Felt roof 40 to 60 per m 2 rubber roof 80 to 85 per m 2.
For an average double garage with four walls quotes should be in the region of 750 to 1 000 outside of london and between 925 and 1 300 in the capital.
Generally a flat roof replacement should cost somewhere between 200 to 500 in labour fees.
These prices are for for a good quality extension.
We would suggest a price of between 100 and 150 for a small patch repair to a bitumen felted flat roof that has a tear we assume that the decking or underlying roof structure isn t damaged.
In london and the south east it can be nearly 2 000 and rising per.
Basic quality would naturally cost less and premium would be more.
Most contractors will include their prices with the overall cost to replace the flat roof.
So pay attention to the quote to ensure you aren t charged arbitrarily.
The usual cost of a flat roof extension is 1 500 per square metre.
Taking all of this information into consideration the average cost of a flat roof for an extension varies between 980 and 1450.
In 2019 an estimate for the cost of a single storey extension is anywhere between 1 350 and 1 950 per m2.
We hope you found our detailed guide to flat roof prices insightful.
This is a conservative figure and based on a countrywide average.
Replace a leaking extension the cost of replacing a flat roof on an extension is unfortunately higher.
The average cost of replacing a flat roof is usually in the range of 700 1 300 depending upon what materials the roofer uses whether or not scaffolding will be needed and the size of the roof.
It is easy to look at the average cost most people will pay for a flat roof extension but the truth is your extension price could fall anywhere in the range of 30 000 75 000.