Whilst the floor boards are up, any central heating pipes that are exposed should be checked to see if they’ve been insulated. This will help prevent knocking and rattling. You can wrap the pipes in air felt insulation. If the new floor boards have been cut with a joist, a new support for the new boards must be fixed to the sides. Drill and screw this don’t use nails. Cut the floor boards to length. You may find that new floor boards are slightly thinner than those that you’ve taken up; in this case they may need packing up.
Find a suitable timber to pack your boards up with. Fix this with pins to the joist. Now position the boards. Make sure you mark the position of any cables or pipes onto the floorboards. Knock a wedge shape in between the old boards and the new boards, which will tighten up the new boards before fixing. Drill through two floor boards avoiding any marks for cables or pipes and screw the floor boards down. Now measure the gap to be filled if it’s not a full floor board. Mark off both ends and cut to size. Make sure you cut off the side with the groove, not the side with the tongue. This should now be positioned. Mark into place if necessary and fix by drilling and screwing as before.