The phrase "an added disadvantage" is correct and usable in written English.
It can be used when discussing an additional negative aspect or drawback of a situation or decision.
Example: "While the new policy has several benefits, it also presents an added disadvantage in terms of increased costs."
Alternatives: "a further drawback" or "an additional downside".
Having your arms stuck to your sides is an added disadvantage in scaling a mountain.
He is at an added disadvantage because his rival, the vice president, can grab headline space as Veep or Gore or a crisp Al.
Robert Griffin III (WAS) vs. New Orleans — It takes a strong stomach to trust a rookie in his first professional start, but the Saints did allow the 10th most fantasy points to the position last season and will be at an added disadvantage to open 2012 with defensive end Will Smith and linebacker Jonathan Vilma suspended from play.
The HGRC likewise was regarded as picking up on 'normal' grief, but was thought to have an added disadvantage of 61 items, which would be particularly unwieldy via telephone.
And, marriage puts women at an added disadvantage--the husband often makes more, so the wife is less able or willing to relocate for a higher paying job.
This means that a black teen-ager in Brownsville, for example, is a great deal more likely than a white teen-ager in Park Slope to embark on adulthood with the added disadvantage of a drug record, even if their experiences with marijuana are exactly the same.
GM has the added disadvantage of a distrustful public and frightened dealers.
However, the method of administration by an intrathecal pump is too expensive a measure to be employed in resource-limited settings, and has the added disadvantage of being a potential route for secondary central nervous system infection [ 52].
But it is with the arrival of an unwanted visitor from Dieppe that the production takes off: this is because Tom Edden, who created the character of the rubber-limbed waiter in One Man, Two Guvnors, plays the visitor as a ferocious egotist who has the added disadvantage of stammering helplessly whenever it starts to rain.
And Netscape has the added disadvantage of not being a market leader in either market.
Although ASICs offer the ultimate in size (number of transistors), complexity, and performance, designing and building one is an extremely time-consuming and expensive process, with the added disadvantage that the final design is "frozen in silicon" and cannot be modified without creating a new version of the device.
