Cabling can be difficult to run at the best of times but what happens when you drill a hole in a plaster wall with the intention of running a cable from the roof cavity down to this hole and find it filled with insulation.
Putting insulation in cavity walls.
That creates gaps and air convection routes around the box.
Put the batt in place and use a scissors to snip around the box.
Most homes built in the past 100 years are built with two layers of wall leaving a small space a cavity between them.
Tuck the snipped out plug of insulation behind the box.
Cavity wall construction ready for cavity insulation the earliest use of cavity wall was way back in greek and roman times but it wasn t until much later that things have got interesting.
Unfortunately however builders didn t insulate the walls of most homes built before the 1980s.
Don t wrap fiberglass batts around electrical boxes or stuff full batts behind them.
So if your house was built before insulating walls became standard you can potentially save a great deal of energy by insulating.
Choose fiberglass insulation batting.
The r value of the batt measures the thermal resistance so the higher the r value the more effectively.
What do you do if you have an un insulated wall in your home.
It s a common issue and it can be fixed using our slow rise foam it green formula.
While rated differently these two types of insulation are close enough in thickness that they can both fit into modern two by four wall systems.
The grade of batting will vary depending on the wall that you re insulating.
In early days of using cavity wall construction 1920 s in modern domestic buildings the cavity was thought to be enough of a barrier for damp penetration.
Running a cable down an insulated cavity wall.
There are various grades of insulating batting for different locations in the house so you ll need a different insulation for interior exterior attic or basement walls.
Insulation in house exterior walls is one of the primary defenses against heat and energy loss.