How to make a cheap whiteboard from scratch.

We salvaged four hardboard plates covered with a white finish from an old closet.
Then we got cover-foil to protect books for a total of € 10,-
We had enough screws lying around so those where free also.
In total we used 21 screws and one washer
The tools we used where a measuring tape, a knife, a wooden spatula and a drill with screwbit.

Step 1: Basics

The first step was to put the four boards together. We did not had enough foil to fill out the board completely so the bottom and top row are two separate strips. In total we had four rolls of foil 2500 mm * 400 mm.

Be sure to clean the surface you use for the plastic, because every hair shows up on the finished board.

Step 2: Align Plastic

If there is a measurement grid on the back of the foil-paper use it to align the roll so you get a straight line.
Start at the bottom so every layer above the bottom one overlaps the previous.

Tape the foil with the paper side down using the grid on the backside to the desired amount of overlap. After taping it down make sure the vertical lines are in line with the side of the edge of the surface and tape down the top half.

Step 3: Apply Foil

On the other side fold back the foil-paper and pull it tight across the board. Next use the grid-lines again to start at the same height that you taped the other side. Now if you pull back the paper it should be hovering above the surface ready to be attached to it.

Use a wooden spoon or another non-sharp surface to push out the air beneath the foil.
Start at the inside and work your way up and out. Like so:

Step 4: Against the Wall

Place the 'withboard' on a support of preferred hight and screw the top half to the wall.
In this case we screwed into a gas-concrete wall, which is a pretty soft wall so we did not need any wall plugs.
The screws have almost nothing to hold so screwing them directly in the wall was enough and saved us time.

Start at one side and press the board against the wall.

After the top row remove the support and press the board to the wall.
Just move from one top corner to the opposite bottom corner and apply pressure at each new screw.
Going down we put one screw with a washer in the middle where the boards meet.

Step 5: Border

This is as far as we got today.
The idea is to tape or glue some cork strips at the sides so we can pin stuff to the border with a tack.

So that's it.

Any questions tips and remarks are welcome.