Better materials for attic roof insulation are rigid foam boards and spray foam insulation.
Ceiling roof insulation foam.
Item 662861 model 158398158398.
A very energy efficient enclosure results.
Rigid foam insulation also known as insulating boards provide high r values.
Looking upward through the open ceiling if the exterior wall and roof deck assemblies both contain spray foam then a continuous insulation and airtight layer is established from the base of the walls to the peak of the roof.
Settled r values range up to about 6 5 per inch and when installed properly the foam can be a good air and moisture barrier.
3 regarding roof insulation vs.
Ceiling insulation like fiberglass or cellulose slows the flow of heat at the ceiling.
So to answer the two remaining questions.
Install it anywhere from the roof to the foundation.
Image courtesy of d7 spray foam insulation houston tx.
Some types of thicker foam board insulation are available but they may need to be special ordered.
Because they have a high r value and can be used nearly anywhere in your home foam board insulation is one of the most common types of insulation.
It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.
So the heat loss from conduction is about the same.
Rigid foam insulation also is a smart choice.
0 78 in x 8 ft x 4 ft.
Can be used to insulate almost any part of your home from the roof down to the foundation.
Rigid insulation is one of the best tools to reduce your energy costs.
They keep your home at a comfortable temperature without the need to crank your heat.
You can even place it under the foundation slab.
It can act as an air and moisture barrier in addition to providing very high r value.
Spray foam insulation applied to your roof deck is superior to traditional ceiling insulation because it deters the heat before it enters your house.
Foam board insulation is easy to use and is a great diy way to add some insulation.
And should you vent the roof.
Best for floors foundation and basement walls interior and exterior wall sheathing and low sloped ceilings.
Is 2 inches of insulation enough.
It is a common misunderstanding that roof insulation is more important than wall insulation because heat rises hot air does rise but the temperature at your ceiling is at most a couple of degrees warmer than at the floor or walls.
Technically known as spray polyurethane foam or spf spray foam is most commonly applied in the space between attic rafters.