Attic tents can vary in size but you do not need exact measurements in order to install them properly.
Installing an attic tent.
Installation of an attic tent is relatively simple.
Due to their flexibility you have about a 2 3 margin of error.
Next measure the access way you will need the inside width and length of rough frame.
Using roofing nails secure the base and seal the nails with roof cement source.
Do it yourself.
Static vents often protrude from roofline thanks to.
Measure the inside width and length of the rough frame then pick the attic tent closest in size.
Slip the top end of the flashing above the shingles directly over your hole allowing it to lap over the area below the hole.
Use plastic roof cement to smooth the vent base and then place the base over the hole.
This measurement will help you.
Installation of this type of attic ventilation involves leaving a gap in the sheathing along the ridge and covering it with a perforated vent.