Protecting a finished floor during the rest of a fit-out is cheaper than cleaning it afterwards and considerably cheaper than replacing it, and it is one of the most casually handled items on a site. The two decisions that matter are laying the floor as late as the programme allows, and using proper temporary protection rather than whatever sheeting happens to be in the van.
The first decision: fit it late
No protection performs as well as not needing protection.
Every week a finished floor sits on an active site is a week of boots, dropped tools, spilled coffee, dragged materials and settling dust. If the programme can be sequenced so that flooring goes in after the messy trades rather than before them, that is worth more than any protection product.
This is not always possible. Flooring sometimes has to go down early because other elements build off it, or because a delivery slot dictates it. But it is worth asking the question deliberately rather than accepting the default sequence, because the default is frequently driven by convenience rather than by what protects the finish.
Choosing protection that works
The failure mode is almost always the same: protection that does not stay where it was put.
Breathable protection over hard floors. Sealed plastic sheeting over a floor that is still curing or has any residual moisture traps it, which can cause problems with the finish. A breathable protective fleece or board is the usual answer.
Heavy-duty board where there is traffic or plant. Sheeting protects against dust and small spills. It does not protect against a scaffold tower being wheeled across it or a pallet truck. Anywhere that takes wheeled loads needs board rather than film.
Overlap and secure the joints. Unsecured joints in protection are worse than no protection, because grit works underneath and is then ground in by the traffic walking over the top of it, which concentrates the damage exactly where the joint sits.
Full coverage, including edges and thresholds. Partially protected floors get their damage at the boundary between the protected and unprotected areas, because that is where people step off the protection.
The tape problem
Worth its own section because it causes so much avoidable damage.
Adhesive tape applied directly to a finished floor to hold protection down frequently leaves residue, and on some finishes it lifts or discolours the surface when removed. On carpet it leaves a sticky line that then attracts and holds soil, producing a visible dark stripe exactly where the tape ran, and adhesive residue in carpet pile is genuinely difficult to deal with.
Tape protection to itself at the joints, or to the skirting rather than to the floor, and use a low-tack product designed for the purpose. This one detail causes more post-fit-out cleaning problems than almost anything else.
Protection is not a substitute for the clean
Being straight about this, because it is sometimes used as an argument for skipping the handover clean.
Protection dramatically reduces what reaches the floor. It does not eliminate it, because it goes down after the floor is laid and comes up before handover, and fine dust gets underneath at the joints and edges in between. A protected floor still needs cleaning before handover, it just needs a great deal less of it, and it arrives at handover without the physical damage that is the expensive part.
The value of protection is mostly in avoiding damage rather than dirt. Dirt can be extracted. A gouge, a paint spill or a burn cannot, see why new carpet needs cleaning before handover regardless.
Protecting carpets and rugs too
Furniture delivered before the building is finished is a recurring and avoidable problem.
Where delivery schedules force FF and F onto site early, keep it wrapped and keep it out of the areas where dust-generating work is still happening. Upholstered pieces unwrapped in a building where cutting is still going on will take fine dust into the weave, and getting it out of upholstery is more work than getting it off a hard surface.
Rugs are the ones to be most careful with. A rolled rug left on a site floor picks up moisture and dust, and a rug laid early takes traffic it was never intended to take. Where a rug is a valuable piece, it should arrive after the building is clean, not before.
Common questions
What is the best way to protect new carpet during a fit-out?
Fitting it as late as the programme allows is the most effective measure, because no protection outperforms not needing it. Where it has to go down early, use proper breathable protection with overlapped and secured joints, heavy-duty board anywhere taking wheeled loads, and full coverage including edges and thresholds, since partially protected floors take their damage at the boundary.
Can you tape floor protection directly to carpet?
Better not to. Adhesive tape on carpet frequently leaves a sticky residue that attracts and holds soil, producing a visible dark line exactly where the tape ran, and adhesive in carpet pile is genuinely difficult to remove. Tape the protection to itself at the joints or to the skirting instead, and use a low-tack product intended for the purpose.
Does protecting the floor mean it does not need cleaning at handover?
No. Protection substantially reduces what reaches the floor but cannot eliminate it, since it goes down after laying and comes up before handover, and fine dust gets underneath at joints and edges in between. A protected floor still needs a handover clean, just considerably less of one, and it arrives without the physical damage that protection actually exists to prevent.
Should furniture be delivered before or after the final clean?
After, wherever the delivery schedule allows. Upholstered furniture unwrapped in a building where dust-generating work is still happening takes fine dust into the weave, which is more work to remove than dust on a hard surface. Where early delivery is unavoidable, keep pieces wrapped and away from active work areas, and hold valuable rugs back until the building is clean.