Measure between joists if insulating a floor or attic or studs if insulating unfinished walls to find the correct width for the insulation.
Studs basement to attic.
In finished attic rooms with or without dormer insulate 2a between the studs of knee walls 2b between the studs and rafters of exterior walls and roof 2c and ceilings with cold spaces above.
Pink fluffy batts wedged tightly between studs rafters and joists insulate the space against exterior temperature changes.
For the horizontal portion of the cable run this can involve drilling holes in the joists where the cable will pass.
2d extend insulation into joist space to reduce air flows.
When necessary use existing ducts or pipe runs to get wires from the attic into the basement.
Install the rolled insulation in the floor by cutting to size pressing into the space between joists and attaching with wire fasteners.
If one wants to pre plan habitable space in the attic under any pitched roof the addition of a 4 pony stud wall will help to maximize the head room and usable area within the attic.
Fwiw there s more to a habitable basement than simply furring out the walls and adding gyb board to enclose the area.
Use a stud to locate the top plate unlike wood steel studs are reliably straight.
If you have access to your basement crawl space and attic you should be able to run wires without having to cut patch any drywall.
It s not uncommon for homes to have exposed fiberglass insulationin the basement or attic.
1a attic access door.
On the first floor run wires up the wall from the basement.
But here s the question.
Does fiberglass insulation need to be covered or is it safe to leave it exposed.
Press them in place and staple through the paper to the studs.
If you re insulating framed walls make sure the insulation is the correct thickness for your wall studs.
Install new rolled insulation between the wall studs.
When adding or replacing wiring in finished walls most electricians will attempt to make the horizontal portion of the cable run in the unfinished attic or basement crawlspace areas looping the cable down or up through the wall cavity across the floor or ceiling joists then vertically through another stud cavity to the next wall box opening.
Cut each strip or batt to the exact length of the cavity.
Don t worry about cutting your metal studs to fit perfectly.
On the second floor run wires down the wall from the attic.
In crawlspaces and basements make sure there are no cracks in the foundation.
Today s insulation products are manufactured to fit in both 2 x 4 and 2 x 6 construction.