Lay a Parquet Floor With Ted Todd Engineered Oak in 9 Steps for 40% Faster Fitting
A 14mm Ted Todd engineered oak block in a herringbone field can run at roughly 4 to 6 square metres an hour once the spine line is set. The delays usually come from the Tramex moisture reading and the first three rows, where 1mm of cumulative drift can become a 15mm gap at the far wall.
Read the subfloor before the packs are opened
A screed reading at 4% moisture by weight on a Tramex CMEX II meter sits at the threshold below which Ted Todd allows direct bonding of its 14mm engineered range. Above that level, the board can cup within a heating season. Take three readings per 10 square metres, record the lowest and the highest, and use the spread as the figure that matters on site. A 0.8% variance across one room usually points to a slab that dried unevenly, often under a kitchen run where cabinetry held vapour in place for months.
Flatten the floor with latex screed to a 3mm tolerance under a 2m straightedge. Engineered oak is more forgiving of subfloor noise than solid plank, yet a 5mm hollow under a herringbone block still turns into a drum-tap underfoot, and adhesive cannot bridge that void. Porous screeds need F. Ball Stopgap P131 before levelling compound goes down, since unprimed latex can skin over and delaminate. The priming step adds about 20 minutes and removes the most common callback on bonded parquet work.
Chalk the spine line through the room
Walls lie. A room that measures 4.2m at the door and 4.18m at the window will pull a herringbone field visibly out of true if the skirting becomes the reference. Strike a centre line down the longest sightline, then square a second line from it at 90 degrees with the 3-4-5 method scaled to 1.2m, 1.6m and 2.0m. The crossing point is where the first two blocks meet at their point.
Dry-lay the spine row over the full length of the floor before adhesive is mixed into the job. That run shows the cut width at both ends of the room. If one end finishes at 30mm and the other at 90mm, move the spine 30mm so the difference is shared and the smallest cut is removed from the setting-out. Ted Todd blocks in the Project range are 70mm wide, so any perimeter cut under 25mm should be designed out at this stage.
Keep the adhesive bed inside its real working time
Sika SikaBond AT-Universal, spread with a 3mm to 4mm notched trowel, gives about 40 minutes of working time at 20°C. In a room at 26°C, especially with underfloor heating recently commissioned, that open time can fall below 25 minutes.
Spread no more than one square metre ahead of the laying hand. A larger bed can skin before the blocks reach it, leaving a hollow bond that fails the tap test two weeks later.
Set each block by sliding it across the adhesive notches so the ridges collapse and wet out the back veneer. Lift one block per 5 square metres and check transfer; at least 80% of the underside should be covered. Blocks that lift at the point joint can be weighted or taped. A strip of low-tack masking tape across two adjoining blocks holds the geometry while AT-Universal grabs over the next hour.
Underfloor heating changes the sequence
An electric underfloor heating mat or a wet system embedded in screed has to complete a full heat-up and cool-down cycle before the oak is installed. After that cycle, leave the system switched off for 48 hours so the bonding surface returns to ambient temperature. Bonding onto a warm slab cures the adhesive too fast and locks stress into the boards.
Once the parquet is fitted, raise the floor temperature by no more than 2 degrees per day. The maximum surface limit is 27°C, the ceiling Ted Todd specifies to keep the oak from drying past its 7% to 9% equilibrium moisture content.
The mat layout below the parquet matters as much as the thermostat setting. A heating mat that leaves cold strips at the perimeter creates differential expansion, with blocks near the wall moving while the field stays still. Run the mat to within 50mm of the skirting line and use a flexible adhesive rated for thermal cycling. SikaBond AT-Universal carries that rating. A rigid PU adhesive lacks it and can crack at the point joints after one winter of heating cycles.
Probe thermometer readings at the screed surface remove guesswork before bonding. If the slab reads 18°C while the room reads 21°C, the screed will still pull heat from the adhesive bed during the critical first hour. Wait until the two figures are within 2 degrees of each other. That check can cost an afternoon and prevent a full lift-and-relay on a heated parquet floor.
Fix perimeter trim with the correct plug
Where a threshold bar or perimeter trim screws back to a masonry wall, a Fischer DuoPower 6x30 plug in a 6mm drilled hole carries the pull-out load of a standard trim screw without spinning in soft blockwork. The DuoPower expands in solid substrate and knots in hollow board, which suits the mixed wall conditions often found at a doorway where brick meets stud.
Acclimatise the packs, then cut to the finish
Leave the packs flat in the room for 5 to 7 days with the heating at normal living temperature and the banding intact. The aim is to let the oak reach the moisture content it will hold in service. Packs stacked on edge against a cold external wall during acclimatisation can produce a convex board that is hard to spot until it is bonded down.
At the perimeter, cut blocks face-up on a mitre saw when the finish is a UV-cured lacquer. For an oiled surface such as Ted Todd’s natural oil range, cut face-down, so tear-out lands on the hidden face in either case.
Scribe to the skirting with a 10mm to 12mm expansion gap that will be masked by the trim. A herringbone field needs that gap on all four sides because the pattern pushes outward from the spine in two directions at once. A tight perimeter buckles the centre point first.
Leave a shadow gap at brickwork
A limewash brick chimney breast sitting directly on a newly laid oak hearth zone needs a 15mm shadow gap. A caulked butt joint is the wrong detail here, because the brick and the timber move on opposite seasonal rhythms.
The oak shrinks in a dry heated winter while the lime-based wash on the brick remains dimensionally stable. A hard joint opens a visible crack by February. Detail the junction as a deliberate reveal and seasonal movement disappears into the design.
Finish the field and control the first clean
An oiled Ted Todd floor takes a maintenance coat of Osmo Polyx within 7 days of fitting, before furniture or foot traffic. Apply it with a microfibre pad at roughly 24 square metres per litre. A lacquered floor needs only a pH-neutral clean.
The floor may look ready to use as soon as the last block is in, but the adhesive beneath has reached only a fraction of its 7-day cure strength during the first 24 hours. Point loads from a heavy boot at a single block edge can break the green bond. Standing water in the micro-bevels between blocks swells the oak veneer at the joint line within hours, and that swelling does not fully reverse.
The first clean is deliberately restrained: a vacuum fitted with a soft brush head, followed by a barely wet mop pad across the micro-bevels between blocks. On a bonded herringbone floor, the joint line is where the installation stops looking like joinery and starts behaving like timber.
