You can also add rigid foam insulation under the rafters which adds r value and eliminates thermal bridging through wood rafters.
Insulation between first and second floor.
Just push it as far as you like gradually bring it back toward you.
Here are some situations when you need floor insulation.
This will also increase thermal insulation for the room above and below making them more comfortable to be in and quieter too.
Consider using high density r 30 batts which are as thick as r 25 batts but fit into 2x10 framing.
If the floor is above a cold space you need insulation.
The main reason to insulate between floors is to reduce the noise transfer between floors.
In my opinion it is reduced by at least 75 just putting bats between the floors.
Second we re debating whether to insulate the ceiling of the main floor of the addition i e between the main floor and the second floor as well as the 2 4 walls between the addition and the original house both floors i m assuming we would just use fiberglass.
Sometimes buildings are construction with first floor eaves and soffits.
Putting insulation between the ground and first floor should in theory stop sound vibration and heat from moving between levels in your property.
If you re building or renovating a double or multi storey house then there may be good reason to considering insulating the mid floor i e.
Let s look at the yes answer for should there be insulation between floors.
One would be surprised at the heat loss from the first floor to the second.
Reasons for heatproofing insulation between floors.
Insulated between floors have very little if not quite no insulating benefit.
You have properly diagnosed the existence of a problem but the treatment is something other than removing the insulation between the floors.
I can tell a noticeable difference when my guys are walking on a second floor of a remodel where they did not insulate between the floors in comparison to when they walk on the second floor of a home we built and insulated between the floors.
If the first floor soffits open into the joist bays these should be air sealed and insulated.
A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel.
Other than that not required.
Presuming the insulation is adequate you have an imbalance in the air flow between the two floors.
Acoustic insulation is very effective at reducing airborne noise.
Acoustic insulation in the mid floor.
Remember that anyplace there is a hole in the ceiling of the first floor or in some cases the bottom of the second floor you.
For all the valid reasons not to add insulation there are also reasons when you need insulation.
Not enough heating and cooling air is getting to the second floor.
However there are certain scenarios and reasons like sound proofing to insulate between floors.