The answer you ve been looking for might be literally over your head.
Add eps to attic.
Strengthening attic joists for live loads by sistering.
Now that you ve air sealed your attic and basement check your attic insulation levels and add more if necessary.
The attic is the easiest place to add insulation to improve your comfort and the energy efficiency of your home.
Eps is used under roofing over foundation walls and beneath siding.
This is the same stuff your disposable coffee cup and is made out of and it s used to protect fragile items in their packaging.
For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
To do that without creating soggy roof sheathing from wintertime moisture accumulation in us climate zone 6 you need a minimum of half the total r value to be on the exterior r25 in exterior foam out of a total code min r49.
It s a great way to add to the home s living space without the complexity that comes with an addition.
If you spent 20 000 on your renovation you can expect 12 200 to be added to your home s resale value.
If the attic joists are not adequate one way to strengthen the floor for live loads is to sister the old joists.
Maybe you want a little rental unit or a romp room for the kids.
Thinking 4 board foil on both sides with a value of r28ish.
You can check the insulation level in your attic by measuring it or getting a company to check it for you.
6 questions to ask maybe you have always dreamed of a better master bedroom as large as the house and as private as can be.
It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation.
Can you add a room in your attic.
Would like to use attic for storage as well.
Am i nuts or on the correct path.
This method i believe if air sealed and installed well may be a good solution.
Because your attic already has a structure in place with a floor and roof it is overall cheaper than a brand new addition.
Sistering is the process of adding a new joist next to each existing joist.
Attics are a top pick when homeowners decide to gain some extra storage or add a guest room but not all attic flooring structures are up to the task of supporting the weight of a new living space.
In new construction the best use of eps in attics would be to put in on the exterior of the roof deck making it a conditioned attic.
Have mechanicals in attic and would like to semi condition space while maintaining a vented roof.
Before entering your attic make sure that the climb to the attic is safe and you wear a protective mask against the tiny fibers in some insulation.
