Here are my ideas and opinions on building an underground shelter.
Location: Build it in a hill preferably, never in any valley's or low places where flash flooding could occur.
Materials: Use as much as mother nature provides as possible. This could keep the cost low.
Keep it simple!
For water, you could have an expensive well dug beside your shelter location then run a pipe with a manual water pump to the inside of your shelter.
For bathroom, I would recommend that you not use any part of your underground shelter. Use an outhouse! Pick a location away from your shelter, away
from your gardens, downhill of any water drainage. Dig a hole. build an outhouse on top of that. When it's mostly full. Fill with dirt, pack the
dirt and move the outhouse to another location. If you needed to, use a bucket to do your business inside your shelter, then dump the bucket in your
outhouse hole ASAP.
Use French Drainage system to keep your shelter dry.
You can also use this culvert method to protect any side of your shelter which water runoff can come from. Dig out your area and depth. Dig deeper
trenches leading out and away from your shelter. This is for water runoff. In the trenches place culverts and punch holes all along the bottom and
sides. This is to let in the water and the water is taken by gravity away from your shelter. Fill the trenches and a quite a few inches above
covering the entire floor with gravel. Then fill with soil or just build your florring on top of that. This way if water does get in your shelter it
will drain through the gravel and drain out away in the culverts. You can also place 55 gallon barrels at the end of the culverts to collect water
for future use and purification. I would suggest this as a simple and cheap method of water purification.
Cheap, easy water purification.
Once the french drainage is in place, then you start with the rest. For the walls you can use a number of materials. Adobe brick with quicklime
plaster to keep waterproof, wood slanted outwards, etc... Keep in mind what I suggest for the roof. Basically use logs found around your property.
There is a thread already on a shleter that a UK couple built for under 5k.
Here is the link to the article with details on the
roffing system I suggest.
And here is a link to the ATS thread.
For the electricity. I would keep your electricity needs to a minimum. (You may have to forfeit your refrigerator).
But the fridge does consume
large amounts of electricity. I suggest a couple of indoor lights and 1 wall outlet. This way you can get by on a solar panel for your electricity.
re is one solar panel kit I am looking at.
I am also considering
wind generator as a source of electricity as
A combo of the 2 would be great. But as many are already thinking, a wind generator sticking out somewhere gives your position away and
a solar panel can reflect light also giving your position away. The solar panel is probably the way to go as plane and helicopters would be the most
likely to see a solar panel reflection. But you may have to learn to conserve your stored electricity when the sun ain't shining.
To keep warm. As your shelter is underground, the earth is an excellent insulator. The more earth you have surrounding your shelter, the more
insulated you will be. I would suggest
a pot belly stove.
Run the chimney pipe up and out your roof with a cap on top to keep water and critters out and stock with firewood. You keep warm and you use the
same energy source for cooking. 2 birds, 1 stone = splat!
If you live in a hot area, the summer heat comfort might pose a bit more problems and needs exploring. Ventilation would be key to keeping cool.
Since you should have an abundant sun source + solar panels you can use a fan to aid ventilation. Maybe, rig a few ventilation shafts which can be
safely and easily plugged and filled for the winter then bore 'em back out for the summer. You may want some mosquito screen to cover the holes to
keep the critters out of your area.
Beyond that, use your imagination and keep it simple.
Cheers! Feel free to add to, modify, as you see fit.