Many houses have two doors, front and back. Several houses also have balcony door (one or two) which can be used as an escape route. And some houses even have 5 doors with one balcony door (big luxurious home).
For the houses with only 1 door and no balcony door (there are some) sprint out of the front door and leg it. Though, Run Speed lvl2 is a must. Also, Stamina Amount lvl2 and Stamina Recharge lvl2 help a lot.
You can also wait it out inside the house, but that requires you to sit tight without moving and where machines aren’t able to see you (e.g inside bathroom, door closed, crouched and not moving). Waiting it out takes quite a bit of time (like everything else when using sneak tactics). But as long as machines can see you through the windows or hear you moving around, they won’t give up.
Biggest threat while hiding in the house is military hunter since it can and most likely will gas you out (especially on Guerilla difficulty). Chances that harv or FNIX tank being so close to the house where they use their gas attack, are slim to none. Also, harv/tank gas attack doesn’t fill the entire house, like military hunter gas mortar does.
For your idea and as far as i’ve read about that space blanket, that protects only against IR vision. But OPV, low light and hearing is still something machines can use to locate you.
It seems to me that your idea is to considerably shorten the waiting out time and personally, i don’t like that.
Note: i also play with sneak tactics and i’m a solo sniper. Waiting extended periods of time just to get clear shot or waiting out machines disengagement are common parts of the sneak and snipe type of gameplay.
Removing the waiting part from sneak and snipe gameplay is like removing the running part from run and gun gameplay.