GreenGuard P Series
Fanfold Underlayment

GreenGuard P1450 Fanfold Underlayment

For use in replacement siding operations to provide a level surface over old siding, add insulation and weather protection

Kingspan GreenGuard P1450 Siding Underlayment comprises ¼” thick closed-cell polystyrene (XPS) with perforated capsheets on both sides. It is configured in fanfolded bundles 4’ x 50’ with cut-n-fold hinges. It is lightweight and easy to cut and install. It is designed to be used as a “leveling board”, added insulation and added moisture protection in installation of new vinyl siding over old siding. Panel rigidity, water-resistance, durability, easy cutting and excellent lay-flat properties make this product the very best fanfold siding underlayment.

Product Brochure

GreenGuard P1450 Siding Underlayment Product Sheet

Product Information

Product Data Table
Installation Guide
Code Compliance
Safety Data Sheet
Technical Bulletin(s)
Typical Physical Properties
Property Test Method P1450
R-Value1
(°F-ft²-h/Btu)
ASTM C518
(@ 75oF Mean Temperature)
1.0
Water Vapor Permeance
(perm)
ASTM E96
Procedure A
1.7
Water Absorption
(max,% by Volume)
ASTM C272 2.0
Fire Characteristics2
Flame Spread
Smoke Development
ASTM E 84/UL 723 25
250
Dimensions / Packaging
Board Dimensions P1450
Length3
50'
Width3 4'
Nominal Thickness 1/4"
Square Feet/Pallet 12,800

1 Specimens were aged and tested in accordance with FTC Rule (16 CFR, Part 460). The R-values shown for GreenGuard-XFP14, GreenGuard-FP38, and GreenGuard-XFP38 are system R-values calculated in accordance with the “ASHRAE Handbook of Fundamentals” using a ½” uniform, parallel dead air space. The R-values of these products installed without the benefit of a dead air space are 1.0 (GreenGuard-XFP14) and 1.5 (GreenGuard-XFP38).

2 These numerical flame spread and smoke ratings are not intended to reflect hazards presented by these materials under actual fire conditions (core data).

3 These dimensions apply to each fanfolded bundle.

GreenGuard Fanfold Underlayment Standard Installation Guide

GreenGuard Fanfold Underlayment Standard Installation Guide

CCRR 1022 1901

Code Compliance Research Report 1022 - Fanfold Underlayment

GreenGuard Reflective Sheathing & Siding Underlayment Safety Data Sheet

GreenGuard Reflective Sheathing & Siding Underlayment Safety Data Sheet

GreenGuard Siding Underlayment, Sheathing & Roofing Cover Board Safety Data Sheet

GreenGuard Siding Underlayment, Sheathing & Roofing Cover Board Safety Data Sheet

GreenGuard XPS Insulation Board Technical Bulletin #7

GreenGuard XPS Insulation Board Technical Bulletin #7

GreenGuard IECC Reference Guide Technical Bulletin #15

GreenGuard IECC Reference Guide Technical Bulletin #15

GreenGuard Type IV XPS Insulation Board Technical Bulletin #18

GreenGuard Type IV XPS Insulation Board Technical Bulletin #18

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Kingspan Insulation North America

Head Office & Sales Office – North America

Kingspan Insulation LLC

2100 Riveredge Parkway, Suite 175

Atlanta, Georgia

USA

30328

Call: +1(800) 241 4402