Poor initial installation or various small critters living in your walls can damage the insulation around the vent pipe causing air drafts back through the hood.
Attic insulation around stove pipe.
A range hood can remove smoke and smells from a kitchen venting them to the outdoors.
This creates a dam around the flue that prevents insulation from coming into contact with it.
You worry for good reason.
Insulating the flue pipe can contain the heat keeping your attic cooler.
You have paid to heat is just wasted as it rises up into your attic and sucks cold air in all around your home around windows doors and through holes into the basement.
Continue this process over the entire length of piping in your attic.
Quality insulation issues associated with insulation around vent piping.
You should never have insulation in contact with a wood stove flue pipe.
Open the insulation piece at the slit and slide it over the pipe.
Step 3 place insulation on pipes.
The il lustrations on page 1 3 and 3 1 show warm air leaving red arrows the house through the attic and cold air being pulled into the house blue arrows.
Time also can be a factor as insulation can become brittle and degrade after a number of years.
These are strips of the material that are cut to length for installation by being stapled to the ceiling of a basement or the floor of an attic and by being affixed around fittings such as pipe work and chimneys.
Air traveling over the surface of the flue pipe may be required to keep it safe and cool.
Once you locate the pipes take the insulation and cut it into sections using the utility knife in order to easily slip it over the pipe.
Most code jurisdictions require the stove pipe be routed through a thimble to provide a safe distance from combustible materials.