image
image

For doors with handles that open outwards, tie one end of a cable lock around the door handle. Tie the other end to a structural support (eg a pillar) or other fixed point. If no structural supports are available, use a piece of furniture or a large block of wood that is bigger than the door frame.

image
image

For double doors, shove a broom between the handles! Even better, use a metal bar. Alternatively, tie the handles together. Make it tight – there’s no point if the door can be opened wide enough to cut the rope

image
For doors with bars (eg fire doors), you can stick a chair between the bars, or tie a cable around the bars as above - so long as there is space between the bars (image source – Occupation: a Do it Yourself Guide)

image
image

When doors with bars have no space for a cable, secure a G-clamp to the bar. Loop a cable lock (or rope, or cable tie) through the space created by the clamp. Note that some fire doors can’t be opened from outside anyway, and won’t need barricading at all. (image source – Occupation: a Do it Yourself Guide)

image
Sliding doors can be blocked from sliding open easily, using a block of wood that’s the right size. Many sliding doors can still be pushed open with force, so think about using other types of barricade too.

image
Attach bolts to a door so you can get out if needed.

image
Hinges are strong, so good for quickly securing a door to the frame.

image
Change the door! If it is too hard to secure a door that opens outwards, just remove and reverse the hinges.

image
Though it takes time, installing a bar across a door adds a lot of strength AND can be removed easily when leaving.

image
If nothing else works… Build a giant wall of tat. The combined weight stops the door from opening inwards, and if it’s opened outwards things will fall on whoever is opening it. Keep materials on hand to pile on to doors which bailiffs are trying to open.