Weed is grown in all kind of places, perfectly built greenhouses, closets, basements or spare bedrooms. Every place has its advantages and drawbacks but some things just go for any room.
What would be a perfect room for you to grow weed depends a lot on the climate you are living in. In a dessert area you would meet other problems than in the coastal region I live in. Where I have the problem keeping humidity low, maybe for you the problem is getting it high enough. But since we still have to find and build a place for our indoor garden let's first have a look at the drawbacks and advantages of certain spaces.
The main problem with attics is the temperature, in summer it will get to hot in winters your plants freeze.
'Reversing' day and night will sometimes help a bit.
Another problem with attics could be that it's just not high enough to hang up the lamps.
Bedrooms offer good opportunities; temperature can be a bit of a problem,
especially if the room is situated on the south side.
On the other hand, most of the times it is simple to adjust the room to your plants needs because walls and ceiling are flat and straight-cornered. There is still some constructing to do, you know?
A problem could be the windows that have to be sealed of, so no light can get in or out. Simply nailing them shut with plywood could attract some attention, so at least please your neighborhood by first hanging up a nice curtain.
Windows could be used to get fresh air into the room, but I wouldn't use them to get stale air out. Because of air turbulence around the building you would never know where the bouquet of the weed goes. Also strong winds might blow the air in, consequently impeding your ventilation from working properly.
Most of the times basements will have a constant temperature and humidity,
which makes controlling things a lot easier.
Getting enough air in and out, as well as getting rid of water, could be the problem here. If you would have a chimney or the likes to get rid of the exhaust-air, the place would be near perfect.
Don't just simply place your plants on the floor, it will be too cold for the roots. Building a low (about 1-foot) table will not only prevent your roots from getting to cold, it also simplifies catching run off water. If there's not enough room for a table, at least place your plants on a layer of Styrofoam.
Reversing day and night.
With this I mean your lamps burn at night and are off during daytime.
The benefit being that temperature is 'smoothed out' a little.
At night, when it gets cold in winter and cool in summer, your lamps will warm up the place. During daytime, in summer you won't heat up the place even more with the warmth of the lights, while in winter you probably would heat up your house more during day- than during nighttime.
Of course there are also some drawbacks:
You have to work at night because you're not allowed to make any light during the dark period of your plants.
Also every indoor garden makes some noise: lamps hum, ventilators vibrate, etc. and as we all know sounds carry further at night than during the daytime.
And last but not least, it could be that by reversing day and night your plants might experience 'night' temperatures just as high or even higher than during its 'day' time. It looks like this has a negative effect on the forming of big buds. It seems Haze likes cooler nights, especially at the end of it's blooming period.
In an effort to make things not more complicated as they already are,
when speaking of day or night from now on I mean:
"from the plants point of view."
As I always feel that most people growing indoor weed underestimate the importance of air,
this is what I will cover on the next pages.
How do you get air in and out, without light shining through? What to do about smell?