Sanding
Exactly how much sanding is required will depend on the product and sub-floor. Assuming that you are not compensating for imperfections in the sub-floor, pre-sanded boards should only need a light final sand once fitted. Use a hand held ‘orbital’ sander or similar with 120 grit paper and sand with the grain of the timber.
Unsanded boards or blocks may need to be filled before sanding. In this case, use a filler that is suitable for gaps of the maximum size that you are filling and apply in line with manufacturers instructions. Broadleaf staff can advise on this if required. Once the filler is dry, sand in two stages: first, use 80 grit paper on a hand held or upright continuous belt sander, then finish with 120 grit on a hand held belt sander or triple disc sander. Additional sanding may be required if there are imperfections in the subfloor.