If you are using spring roo generated project than it uses tiles 2.2.1 at least. in that case you dont need Jrebel to do it as Tiles can do it directly, just set the useMutableTilesContainer and checkRefresh properties to true on spring's TilesConfigurer bean
<bean class="org.springframework.web.servlet.view.tiles2.TilesConfigurer"
id="tilesConfigurer" >
<property name="useMutableTilesContainer">true</property>
<property name="checkRefresh">true</property>
it's explained in detail here: http://lalyos.github.com/blog/2012/08/29/tiles-reload-definitions-in-springmvc/