Is fanfold a vapor barrier?
This is because fanfold has some vapor/moisture barrier qualities (though not always as good as other vapor barriers) AND it is an insulator. Learn about a product better than Tyvek AND fanfold insulation!
What is a fan fold in roofing?
Description. Fanfold CRB board is an extruded polystyrene foam core sandwiched between two tough polypropylene facers, featuring an advanced cut- and-fold hinge. The product lays flat and creates a smooth/level surface over most existing roofing systems, including smooth and gravel surfaces.
What is fanfold underlayment?
PROPINK® Fanfold Underlayment Board is a thin extruded polystyrene fanfold board faced on both surfaces with a plastic film facer. It is engineered to provide resistance to air infiltration and liquid water penetration in residential and commercial exterior wall construction.
What is fanfold used for?
Fanfold insulation is an extruded polystyrene foam insulation which is designed to be applied to the exterior walls of homes, between sheathing (or pre-existing sidings) and usually vinyl siding. Its purpose is to provide thermal protection and to form a second barrier between the elements and the framing.
How is fanfold installed?
A. Install TRI-BUILT® Fanfold Underlayments directly over old siding using galvanized or aluminum roofing nails, with nails spaced about 2 feet apart. If the existing siding is damaged, remove it and install TRI-BUILT® Fanfold Underlayment directly to the substrate.
Can you put Tyvek over fanfold insulation?
The No-Choice Option. Of course, you can always elect to put both Tyvek® HomeWrap® and exterior fanfold insulation on your home, giving it double protection without having to make the choice. It may cost a little more initially, but it could save you down the road in both damages and annual heating bills.
What is the R value of fanfold?
Technical Information
| Property | Test Method | 1⁄4″FANFOLD |
|---|---|---|
| R-Value (ft2·hr·F/Btu) | ASTM C518 (Modified) | 1.0 |
| Water Absorption, maximum % by vol., max | ASTM C272 | 2.0 |
| Water Vapor Permeance, perms, min | ASTM E96 (Procedure A) | 1.0 |
| Compressive Strength, psi, min | ASTM D1621 (Modified) | 8 |
What is a fanfold?
n. A continuous sheet of paper that is folded in a regular, alternating fashion.
What is the R value of 3 8 fanfold insulation?
R-Value 1.70 @25F.
What goes underneath vinyl siding?
Underlayment Underlayment or weather resistive barrier (WRB) is installed between the siding and the sheathing. This can be tar paper or a house wrap such as HardieWrap® or Tyvek HomeWrap®. HardieWrap® is great for keeping water out and at the same time letting water vapor escape from the house.
What is the R-value of fanfold?
Should fanfold be taped?
To be an effective weather-resistive barrier, though, the seams of the fan-fold must be carefully taped, since any seam can provide a pathway for water to reach the structure under the foam. It’s always a good idea to check with the foam manufacturer to be sure that the tape you use is compatible with its product.
When to use R-Tech fanfold roof underlayment?
Shipping leadtime: 1-3 business days. R-Tech Fanfold Roof Underlayment. Used to cover existing roofing system before application of PVC, TPO, or EPDM membranes, for siding, as a general purpose protection board and as a below grade waterproofing layer protection board.
How big is a R-Tech fanfold roof bundle?
R-Tech Fanfold 1/2 inch thick Roof Underlayment/EPS Insulation with Foil, 1.25 Density Type VIII, White Faced one Side, Foil on the Other, UL Listed, R-Value R-Value 2.27 @25F. 4×50 foot fan-fold bundle in a bag, 200 sq.ft total. Price/Bag. Ordering Notes: 14 bags/pallet. Shipping leadtime: 1-3 business days. DESCRIPTION:
What kind of insulation is used in fanfold?
Ready for Everything R-Tech FF (Fanfold) is a high-performance sheathing consisting of a superior closed-cell, lightweight and resilient expanded polystyrene (EPS) with advanced polymeric laminate facers. R-Tech FF meets or exceeds the requirements of ASTM C578, Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation.
What makes the underlayment of a fan so durable?
The underlayment is extra durable, thanks to flexible plastic facers on both sides. Plus it’s perforated to allow moisture vapor to escape. The cut-and-fold hinge design ensures it lays flat. A perforated reflective facer that can enhance thermal performance is also available.
