How do i build a simple door monitor if I believe someone is entering the house while I am away? we need to know from the outside (before we accessible the...

we need to know from the outside (before we accessible the door), if someone has enter while we were away. something that when it is "tripped" will not be notable..the only item I can come up with is scotch tape>>>>
Have sediment block contained by marine heating system...
Instead of tape, use a spine or two glued to the door and the frame. Since the hackle is so slim there is smaller amount chance that it will be notice.
How costly would it be to use ozone...

I want to build a pizza oven, do...
Depending upon your weather conditions...you could use tape if the sun and weather does not motive the glue to deteriorate. Match sticks, toothpicks stuck contained by a specific location so that even if it fell out, could not be placed back contained by the same spot...

I hold sometimes place a bottle or common intent just inside the door so that if the door be opened, the signpost will be moved.

If you had a ribbon or string long plenty to hang inside and it be to end up on the outside if the door be opened and next closed... it may work...
Is the eaves approaching and attic?
Answers:    Just adaptation the locks on the door and problem solved