Heres a few I would go with:
I would take four wardrobes and cover the ends with blades, then fill it with stones. Attach a pulley system to it , then drag it to the top of a stair case. When zombie are coming up the stairs, drop it down. It'll shatter bones and snap spines. Then, if you have time, drag it back up the stairs and do it again. When the first stair case is overrun, go to the next one.
Seal off all the doors, then put these simple traps there, set to go off when the door is forced open:
Spike ball(just how it sounds, ball+tons of spikes=impale), take one of the lawn mower engines and place it at waist hight, then put cheese wire at ankle hight. Zombie walks in, lawn mower starts, wire trips him, he falls face first into the mower. Put one of those by the main entrance, then use weed whackers with cheese wire instead of plastic to do this with other doors.
Home made grenades:
Open up the bottoms of a bunch of bullets, take out the gun power. Fill small plastic bags with gunpowder and kerosene. Take film canisters(little plastic ones) and place the plastic bags inside. take the head of a match, a small strip of sandpaper, and a wax coated string. Poke the string into the plastic bag. Glue the match head onto the cap of the film canister, with sand paper on the side. Put the string near the match head. To arm, twist the cap of the canister, then throw into crowd of zed(DONT DO THIS IN YOUR HOUSE, IT WILL BURN IT DOWN). FOOM! I would coat the lawn in something flammable, then before the zed reach your house. dig a ditch about 4 feet deep, two yards away from the house. Fill with all the gas you can spare. WHen the zed start coming, throw the nade on the lawn. Lawn catchs on fire. All zombies burn like crazy, then they fall in the ditch. FOOSH! try to make sure that the ditch is too deep to climb out of. eventually the fire will go out and the pile of dead bodies will be tall enough for other zombies to climb on to of and into the house. I would also coat the floors of the house in kerosene, then cover the zipline in it as well. When you flee, you light the zipline on fire, then watch as the fireworks go off. (there are actually fireworks in the basement. See what you can do with those.) They also have a seemingly unlimited supply of gas and kerosene, and there are several large barrels of black gunpower in the basement with the fireworks. Have fun!
-_- the idea was that you submit ideas, not point out the obvious.
I said, IF YOU HAVE TIME TO RELOAD.
4 people stationed at house. 3 people are assigned in the first 8 hours to haul out and cache (and bury) as much food , ammo and supplies as possible within a 2 - 5 mile radius of the house. The remaining ammo has been wrapped in tarps and buried behind an old barn. Food and supplies have been hidden in and around the barn and other outbuildings along with all usable tools, furniture, etc.
Then 2 people are assigned to digging trenches 1 mile from the house, surrounding the perimeter. Trenches are 5 feet wide by 3 feet deep at random intervals. Some of the trenches will later be charged with ammo so that at any given time, a charge can be let off blowing up the trench and anything around/in it. They also act as stumbling blocks so that many zombies can trip and fall into them and some of them also have 12" spikes pointing upwards so they get impaled.
Multiple trees closer to the house have been cut down and left with branches intact, to create choke points where high impact explosives have been set.
Meanwhile, pulley systems are attached to nearby the trees and make shift harnesses are strapped onto them. The other 2 people are assigned work on the harnesses and selecting large trees to hang them from. Eventually, if needed, these will be used as drop down "aerial" defense so that 1-2 people can strap in and defend from the tree tops, just a few feet out of zombie range using the weedwackers retrofitted with wire. The tree pulley system is also attached to the zip line, for retreat purposes back into the tower. One of the lawn mower motors is used pulling up the tree snipers out of harms way as well as winching them back up the tower zip line. All five of the weedwackers are stowed in the trees since they are gas pull engines and have to be manually started.
Knives and razors are mounted to the outside of doors and window at shoulder to head height at 90 degree/right angles. Since the Z's have to push against a door, this means they have to push against the knives and since I have honed everything to razor sharp, some appendage will be cut off in the pushing process and maybe even a few heads will roll.
The Safe is placed in front of the weakest point of entry (big picture window, etc.) Extra knives/razors mounted there as well.
Chainsaw stays in the house - either chopping up zombies or stairs or whatever is needed or even hand to hand if it gets that bad.
The detached garage is set up as a decoy building. Once it is established that the Zeds are actually headed our way, small game animals will be placed in the building. When the Z's break through the door, there is a 10 minute delay as they fill the building then BOOM!
Around the inside and outside of the doors and windows are booby-trapped with small explosives and flash pots. They are strategically placed to help keep the Z's away from the 2 stairways to the Tower. The first stair well has the first 5 bottom steps chopped way and has several flash pots around it. Every other step is missing as you climb the stairs, the top of the stairs is blocked with chicken wire. The hallway has flash pots and low impact charges.
The Spiral case is metal and the outside has been wrapped with chicken wire. More knives and razors are wired into the chicken wire extending through the wire to the outside. In order to even get to the staircase, they have to go through wire, knives and razors, plus climb a very steep incline only to make friends with a lawnmower.
At the top of the spiral stairwell, where the top spiral meets the floor, a hatch as been built. Attached to the hatch is the 2nd lawnmower, reconfigured so the blade extends 1 foot from the bottom of the frame and has been fitted into floor, blade out. The last person up the stairs locks down the hatch, pulls the starter cord and the lawn mower hopefully will do some major damage chopping and maiming.
Some of the ammo fitted our guns, so we will defend from the tower and the trees with guns as well. We also winched up some very large rocks to be dropped on the Z's
All 4 of us have bug out bags filled with 2 days supplies and instructions are if we are overrun with zombies at the house, we blow the house after we have zip-lined across the river. We'll meet to make camp at the first cache. If it is safe to go back to the house, (meaning most are dead and we can pick off the few remaining), then the plan is to go back, move into the barn and outbuildings, salvage whatever we can from the house and garage and continue fortifying the area.
Otherwise, we'll follow the caches, taking only what we need with the idea that at a safer time, we'll go back to rebuild. Depending on how devastated the town is, that may be a temporary safe haven, since, ideally, ALL the Z's came up our way once they finished off any towns people.
Chapter Two - 21 Days in the Woods with a Hammer, a box of Strike Anywhere Matches, 27 Cotton Balls, 15 shotgun shells, 3 wigged out companions and a harmonica. . .To be continued
Well, I want to salvage the house if at all possible per the scenario provided to us. So blowing it is the last resort, hence the flash pots and low impact explosives inside and outside.
And, I don't want to be on the 3rd floor of a house filled with powder and kerosene if there is a chance that we don't have to leave.
The idea is to slow them down and stragetically kill them off BEFORE they get inside the house. If they get in and overrun the place and are able to breach the 3rd floor (tower), then we go to the next plan.
Step 1: move food and ammo to second floor
Step 2: destroy stairs
Step 3: set watch points (ex: sniper in the tower, gunners in the windows)
Now for the traps:
Remove the doors on the first floor (they could get in the way of the traps and can be used to block other paths)
-Dig out in front of a door and have a lawn mower over turned in the hole (can't figure how to activate it right now. add ideas if you can think of how)
-trenches around the house filled with knives and sharpened pieces of wood
-Zed are attracted to sound so have a TV or radio with a remote outside away from the house to turn on as they get near also have an explosive near it for when the crowd around it gets bigger
-pipe-bombs rapped in firecrackers (to attract then explode) thrown out of the windows when needed
Running out of ideas right now might add more later