The answer is no.
Remove attic insulation before blowing in new.
Insulation removal in toronto can be expensive and time consuming.
Replace the old failing duct tape with foil tape and insulate the uninsulated register boxes.
Rat urine and droppings are hazardous and need to be removed along with all the insulation in the infected areas.
In this situation insulation removal is necessary and the attic must be disinfected before blowing in new insulation.
The box stores will loan you a blower free for 24 hours if you buy at least 30 bags of insulation.
Therefore it is important that you fully understand when uninstalling might be required.
Use the commercial vacuum hose to remove the insulation and clean the attic floor.
It s best to start at the farthest corner of your attic and roll up the batts or fold them over as you roll.
Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used.
Remove the old stuff and you put all that dust into the air.
Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.
If a rat has been in an area a trail of droppings will follow them.
Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation.
Make sure you have long sleeves goggles and paper masks before you begin the attic insulation removal.
As you work back toward the attic access point drop the rolled insulation in a large garbage bag.
Removing attic insulation is the first step in our integrated attic cleaning solution.
Use the shop vac to remove remaining insulation after raking and vacuum the attic floor without commercial vacuum usage.
If you do this you ll trap the dust in place.
You will rarely have to remove your old insulation when setting up a new one.
Blown in insulation is commonly used in attics and in between new walls it s affordable and simple to install.
If your attic has old or dirty insulation it may be time to get it looked at and replaced.
Standard practice is to leave the existing insulation in place and blow in new insulation to cover it.
But there may come a time when the insulation needs to be removed.
Old attic insulation is often inefficient and could lead to unnecessarily high energy bills.
If asbestos is found have it professionally removed by a company licensed to deal with asbestos.
Fiberglass batt insulation removal.
As for new insulation the last answer was spot on for blowing in new insulation.