Open cell vs closed cell.
Closed cell vs open cell foam in attic.
The home builder used 1 2 polyisocyanurate as an interior vapor barrier under 1 2 drywall.
It s expanding properties ensure that it covers every little crack and hole but even with that ability it still needs to be installed correctly.
I am getting mixed advice about closed cell vs.
Open cell foam insulation in my attic area.
Here s a quick summary of open cell vs closed cell foam strengths and the best applications for each.
Closed cell foams use enovate also known as 245fa.
Spray foam insulation is broken down into two categories open and closed cells.
Exterior has a 1 2 thick drainage board and building paper against the sheathing where the thinstone veneer is attached to this specialized system designed for stone.
Its rigid nature also adds to the structural integrity of.
Most insulation contractors are recommending open because it s cheaper and also because if i go with closed cell and the roof leaks it will not penetrate the insulation and could remain stuck between the sheathing and the insulation and could rot the wood and or travel to a more hidden spot of the roof or attic causing worse problems that are.
The insulation is blown into the wall or attic one layer 1 at a time.
Benefits of closed cell foam closed cell foam is the best choice for robust insulating where space is an issue as it can achieve 2x the r value of open cell inside a standard wall.
Open and closed cell foam insulation use a blowing agent to forms the cells within it.
Open cell foams use water as a blowing agent.
This describes the way that the foam looks once solidified.
Open cell has an r value of 3 7 and closed cell has an r value of 6 5 based per inch of installed spray foam.
Closed cell insulation can break apart existing structures due to its strength and expansion.