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Laying parquet on joists

In this DIY sheet, we will detail the installation of an English floor, which is the most classic and most accessible.

Difficulty level

Medium (for experienced handyman)

Tools and materials needed

A hammer.
Plaster or cement mortar.
A handsaw.
A bracket.
A mallet.
A chalk line.
A chisel with wood.
One meter.
Nails flat head (55 or 45mm depending on the size of your floor).
A chalking line.
A big rule (2m).
A spirit level.
Wooden wedges.
Parquet boards.

Step 1: Prepare the surface and support

Before being laid, the floor must spend at least 48 hours in the room while keeping its original packaging, packaging closed, so that it acclimates to the ambient conditions.
Before installing parquet, make sure that the room is dry and sheltered from rising damp.
You must also check that the clevis is flat with a large ruler, knowing that a tolerance of 2mm is allowed. If the irregularities are too important, you will have to patch it to see the leveling or planing of the wood punctually what is not advised, but can sometimes troubleshoot.

Step 2: Laying the joists

The joists will be placed according to the direction of the blades (and joists if there are any), to which they must be perpendicular.
Using the chalk, the square and the spirit level, trace the location of the joists, indicating their thickness. Count 45cm spacing between each joists and 2 cm between the walls and the last joists.

Before laying your joists, plan possible passage holes for cables or pipes.
It is advisable to treat your joists before putting them (insecticide, fungicide, water repellent).
The installation of joists varies according to the type of soil
On a joist support, the joists must be screwed or nailed perpendicular to the joists, due to a joist fastening. The joists must rest on at least three joists.

Laying parquet on joists: joists

On a concrete support, the joists must be sealed with plaster or mortar. Before sealing the joists, push each side of the nail with 25 cm intervals to ensure the seal is held. Then make a plaster or cement flashing along the joists to fix them to the ground.

Laying parquet on joists: joists

Let your flashing dry for at least 24 hours before laying the floorboards.

Step 3: laying the parquet floor (English type)

Begin laying the boards along the walls, grooves on the wall.
For each blade, insert two shims 5 to 8 mm thick, placed on each side between the wall and the blade. They will avoid the contact and play between the wall and the wood and will be filled by skirting boards during finishing. The boards must be placed closely together and parallel.

Laying parquet on joists: joists

To nest one blade in another, use a wooden mallet by hitting gently, so as not to damage the joint. Once the blade is well embedded in the previous, nail it to the joists by planting a tip "man's head" of 50 or 55mm, angled above the tongue. The head of the nail must be well embedded in the wood. Be careful not to burst the wood during this operation which must be done gently.

Laying parquet on joists: joists

Laying parquet on joists: parquet

From one row to another, shift the joint about twenty centimeters. For the last row, leave 5mm of play, cut the blade if necessary, then fix it to the joists.

Step 4: finishes

Wait a few days (at least a week) before finishing, as the wood acclimates to the temperature and humidity of the room.
With a saw and a 45-degree cutting guide, for corners, cut lengths of skirting boards the same thickness as the play blocks (5 to 8mm).
Remove the play blocks and place skirting boards instead along the walls. To fix the baseboards you can nail or glue them with a putty-glue.
You can then sand, wax, oil and stain or vitrify the floor at your convenience.

Video Instruction: Constructing a Suspended Floor to Building Regs