I don't know anything about this Durafoam. I assume it's an EPS, like the white beady stuff, which does not perform as a vapor barrier alone. It's a moisture barrier.
Where is vapor barrier nailed?
How much foam do you need to stop water vapor?
What type of insulation should be used for a framed wall?
What is super TUFF R?
What is a dricore floor?
Why not frame a wall?
Does foam board stop water vapor?
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Does foam board act as a vapor barrier?
Rigid foam board, especially foil-faced polyisocyanurate, creates a vapor-impermeable barrier, so the wall would have limited drying potential. Even more permeable types of insulation, such as expanded polystyrene, are vapor barriers when the installation is thick enough.
Is XPS foam board a vapor barrier?
XPS is manufactured in both an unfaced form or with different plastic facings. However, XPS is considered a vapor retarder, not a vapor barrier.
What is DuroFoam used for?
DuroFoam insulation is a closed cell and moisture resistant insulation with a thin film laminated to both sides of the product. It is easy to install and can be used in many applications; exterior sheathing, continuous insulation, basement floor, under slab insulation and cathedral ceilings.
Is EPS foam a vapor barrier?
Q: Can EPS act as a vapor barrier? A: No, although EPS has a low water vapor transmission rate, EPS is not a vapor barrier. Rather it "breathes", and therefore does not require costly venting as do other insulation materials, which would otherwise trap moisture within walls and roof assemblies.
What thickness XPS is vapor barrier?
1-1/2 inchAt one inch, XPS is vapor-semi-permeable – meaning, it is vapor di use open, or “permeable”. At 1-1/2 inch and great thickness, however, XPS becomes vapor-retarding (i.e. a “vapor barrier”1).
Do you need a vapor barrier with foam insulation?
Closed-cell spray foam insulation, on the other hand, is completely moisture-resistant. Because it creates a moisture barrier on its own, there is no need to install a separate vapor barrier as long as a sufficient quantity of insulation has been implemented—typically around 1.5 inches thick.
Is DuroFoam any good?
With an R-value of 3.75 per inch, DuroFoam insulation is ideal for adding energy efficiency and cost savings to any project. It is easy to install and can be used in many applications; exterior sheathing, continuous insulation, basement floor, under slab insulation and cathedral ceilings.
How do you install DuroFoam insulation?
0:593:01How To Insulate Interior Basement Walls with DuroFoam InsulationYouTubeStart of suggested clipEnd of suggested clipStarting from a corner attach durafoam rigid insulation to the basement. Wall using an adhesiveMoreStarting from a corner attach durafoam rigid insulation to the basement. Wall using an adhesive compatible with expanded polystyrene insulation apply the adhesive according to the manufacturer's.
Is DuroSpan a vapor barrier?
Vapour Barrier System Requirements Although DuroSpan GPS insulation has a vapour permeance less than 30 ng/(Pa•s•m2), it is attached to the exterior (cold side) of above grade walls.
Does EPS absorb water?
EPS is a closed cell and cannot absorb water. During the process of moulding a block, tiny channels are formed between the EPS particles. If the material is immersed in water these tiny channels can be filled with water.
Which is better EPS or XPS?
In general, when comparing EPS and XPS board densities, the compressive strength of XPS is greater than that of EPS. For EPS to achieve the same compressive strength as XPS, the density of the foam would need to be increased, often resulting in a greater thickness of board being required.
Is polyisocyanurate a vapor barrier?
Polyiso: • Holds the highest R-value per inch of any commonly used rigid foam insulation. Provides water resistance as well as superior vapor barrier control.
Does insulated plasterboard have a vapour barrier?
Moisture resistant Insulated Plasterboard is backed with rigid polyisocyanurate foam and two vapour barriers which are specially designed to use in wall linens and internal wall partitions.
Is polyiso a vapor barrier?
Polyiso: • Holds the highest R-value per inch of any commonly used rigid foam insulation. Provides water resistance as well as superior vapor barrier control.
Does XPS foam absorb water?
Extruded polystyrene (XPS) insulation is unique among common thermal insulation materials for its low moisture absorption and tolerance of wet environments.
Is DuroSpan a vapour barrier?
Vapour Barrier System Requirements Although DuroSpan GPS insulation has a vapour permeance less than 30 ng/(Pa•s•m2), it is attached to the exterior (cold side) of above grade walls.
How much closed cell foam do I need?
You need 2" of continuous closed cell foam to eliminated the need of a vapour barrier otherwise don't bother with foam. Anything else like too little or gapped open cell foam and other semi solutions will be unpredictable, making a plastic vapour barrier unpredictable.
How much thermal break do you need for rigid board?
Most rigid board is R-5 per inch so you probably need 2 inches to create the thermal break necessary. On dow's website http://building.dow.com/na/en/tools/installations/batt.htmthey mention using a vapour barrier on top of the rigid board, but they don't specify what the board thickness was. Even if you create a vapour trap between the board and poly vapour barrier I think you would be OK as it is the continual influx of vapour that causes problems and you would have stopped that. If you are using Roxul you have nothing to worry about. If you also have BluWood studs even less to worry about. The small amount of vapour you could trap can migrate out through the wood-studded wall as wood naturally dries (probably at the top and bottom plate).
Is rigid foam insulation a vapor barrier?
Rigid foam insulation is usually a qualified vapor barrier. However, an installation between the studs can pose a challenge. To complete the vapor barrier you would want to foam-seal or tape all the sides where the rigid meets timber, because these gaps will facilitate vapor flow. Share.
Do you need a foil barrier for foam insulation?
So, as long as you have a tight seal, you shouldn't need any other barrier.
Should you vapor barrier insulation?
Especially if you are going to be inspected later. Any airflow will degrade the effectiveness of insulation.
Do you need double barriers?
You definitely don't want double barriers. Also, many believe that older houses 'breath' a lot naturally and don't necessarily need the VB at all. (VB's are always a slightly controversial topic in the trades anyways...)
Does foam board need a slip sheet?
Any rigid foam board below grade must have 6-mil poly slip sheet covering the entire exterior surface as it is not qualified to be considered self-draining insulation. The only exterior below grade insulation that I have found to be self draining is the mineral fiberglass insulation. Please do your homework because if I am coming to do your inspection and the below grade foam insulation doesn't have a slip sheet, then you'll be mad at me because you'll be digging up the back fill. I am a certified and licensed LBO for the state of MN.
What is vapor barrier?
Vapor barriers are sheets of plastic or other material placed on one side of insulation sheets. This barrier is meant to keep moisture from getting to the insulation in the walls and ceilings, and it is required by building codes when insulating most houses. In any case, the vapor barrier must point to the warm side. Advertisement.
Where should a vapor barrier be placed?
The placement of the vapor barrier depends largely on the climate where your house is. In warm climates, the barrier should point to the outside of the house, blocking the vapor from the humid outside air that may seep into the walls or ceilings. In cold climates, the opposite is true.
Why is moisture bad for insulation?
The moisture will get the insulation wet and reduce its effectiveness. It can also cause mold, rot and other problems in the wall. The right barrier will block the moisture from reaching the insulation.
Is vapor barrier paint better than sheeting?
In many of those cases, vapor barrier paint woks better than installing sheeting.
Who makes POLARFOAM 7300-0 SOYA?
Mr. Cole informs us that they only work with this material. "We feel that the superior performance characteristics make it a far superior choice in building envelopes of all types. Our material of choice now is POLARFOAM 7300-0 SOYA which is manufactured by DEMILEC here in Canada." Mr. Cole can be contacted at 905-271-6644 or at [email protected] - 04/30/2009.
What is the difference between flame spread and absorption?
This is important for assessing the risk of mold in some materials. Flame Spread is a measure of fire resistance of the material. Use these numbers to compare one insulating material to another.
Where is vapor barrier nailed?
The vapor barrier is sealed to the concrete wall at the bottom with some sort of seal and nailed directly to the concrete. The insulation and barrier extend right up into the joists where they are heavy duty stapled to the joists and flooring on the main level.
How much foam do you need to stop water vapor?
Current “science” tells us that you need a minimum of 1-1/2″ of foam in order to stop water vapor. So you’ll run a slight risk that water vapor can move from the block wall, through the foam, in into the wall cavity where the fiberglass is located.
What type of insulation should be used for a framed wall?
The concept should be: – Traditional framed wall with fiberglass insulation and vapor barrier. – Framed wall on top of concrete, new wall to be built in front of it. This should have unfaced insulation in the cavity, then the new wall should have either fiberglass with a vapor barrier or foam.
What is super TUFF R?
it’s the SUPER TUFF-R 1 1/2 In. 4 x 8 Polyisocyanurate Rigid Foam Insulation. it’s silver on one side and blue on the other.
What is a dricore floor?
Dricore (and other systems with a wood top) offer a more rigid, stable base to install flooring on. In a perfect world, you insulate the floor (or use some sort of air flow/barrier system), then install a layer of floor sheathing to create a rigid, quiet floor.
Why not frame a wall?
Why not frame a wall? if you do that you won’t have to worry about parging the surface. All the adhesive has to do then is hold it in place until the framing goes up. The framing will also allow you to install some additional fiberglass insulation for more R value if you want.
Does foam board stop water vapor?
Foam board does a great job stopping water vapor from entering the framed walls. However, foam board does nothing to stop water (physical water) that might leak through cracks. As I’ve said on this site many times water drainage issues MUST be fixed first and foremost before finishing any basement.
