Asbestos has been found in Princess Margaret Hospital in Old Windsor.
But a hospital spokesman insisted the presence of the substance need not cause any concern.
The lethal substance which was extensively used in older buildings can cause long term health damage if it is disturbed or broken up.
But a spokesman for BMI Healthcare which owns the private Princess Margaret Hospital in Osborne Road, Windsor said that the presence of the material in the building would not cause any risk to staff or patients as a major refurbishment programme starts.
He said: "Over the coming months, the asbestos will be safely removed in accordance with the relevant legislation and we are pleased this approach will minimise disruption, enabling us to continue delivering high quality healthcare to our patients without the need for the hospital to close."
He said patients would be kept updated with the refurbishment programme.
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