• Byrons Squares should be laid on level, dry concrete     screed or timber sub-floor (plywood or chipboard).

•  To decide which way you wish to lay your Byron Square,     (square to the walls or at an angle to them) fit together half     a dozen pieces of frame (without fixing) on the floor of the     room where they are to be fitted and turn them until you     find your preferred angle.

•   Always begin fitting in the centre of the room. This will      enable you to accommodate any deviation from square in      the walls of the room once you reach the edge.

•  Always fix frames with the flat side upwards and the     saddle joint opening downwards. This will ensure that the     stub tenon ends join under the saddle joint and are not     visible. Before fixing each frame piece, break out the plugs     with a sharp chisel. Keep these for later.

•   Use Gripfill (or equivalent adhesive) to fix the frame pieces     to the sub-floor. Once you have fixed several frames so     that the saddle joints cover the stub tenons, to drill into the     pre-drilled holes in the frames, through the stub tenons and     down into the sub-floor. Push a suitable rawl plug through     the hole, and then fix a screw to pull the saddle joint down     tightly onto the stub tenons and fix the joint. Repeat this     process until all frames are fixed, cutting frames where     necessary at the edges of the room.

Note: If you have underfloor heating or other pipes close to the surface of the sub-floor, only drill into the stub tenons and use a shorter screw just to pull the joint tight.
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