The hosting Hammers started the brighter of the two sides, but they were unable to convert two chances within the opening seven minutes.
Their failure to find the net was then duly punished as Remy opened his account for the R's with 14 minutes played. Adel Taarabt was the provider, slotting the ball through to the French international, who sprinted away from the West Ham defence before slotting the ball beyond Jussi Jaaskelainen.
West Ham's response was positive and they felt that they should have had two penalties in quick succession.
As the half drew to a close, the visiting defence held firm to West Ham's pressure and as a result they lead heading into the interval.