Support device for securing sheet material to a backing surface and method of using same

A support device for securing sheet materials to a support surface, comprising:

• an elongate main body having a side wall which connects top and bottom surfaces of the main body and a channel which extends in a longitudinal direction along a central portion of the main body's top surface;
• a manipulateable member which is configured to be operatively connected in the channel and to be moved relative to the channel;
• and
• a fastener which secures the main body to the support surface, wherein
• the bottom surface of the main body is flat or substantially flat and is configured to flushly engage the support surface when the main body is secured to the support surface,
• the main body includes a projection which extends from a portion of the side wall outward and at an angle to the side wall, the projection having a free end which is normally disposed at a level which is slightly different from a level of the bottom surface of the main body so that when the main body is attached to the support surface a gap will be defined between the free end of the projection and the support surface, and
• the manipulateable member and the channel are configured such that when the main body is fastened to the support surface and the manipulateable member is moved relative to the channel the portion of the side wall from which the projection extends is also moved and changes a width of the gap defined between the free end of the projection and the support surface.