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 Information

Typical Physical Properties
Property Test Method P1450 FP1450
R-Value1
(°F-ft²-h/Btu)
ASTM C 518
(@ 75oF Mean Temperature)
1.0 3.0
Water Vapor Permeance
(perm)
ASTM E 96
Procedure A
1.7 1.7
Water Absorption
(max,% by Volume)
ASTM C 272 2.0 2.0
Compressive Strength
(psi @ 10% deflection)
ASTM D 1621 12 12
Fire Characteristics2
Flame Spread
Smoke Development
ASTM E 84/UL 723 25
250
25
250
Dimensions / Packaging
Board Dimensions P1450 FP1450
Length3
50' 50'
Width3 4' 4'
Nominal Thickness 1/4" 1/4"
Square Feet/Pallet 9,000 9,000

1 Specimens were aged and tested in accordance with FTC Rule (16 CFR, Part 460). The R-values shown for GreenGuard®-FP1450, 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®-FP1450 and 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 P1450 Siding Underlayment_Product Sheet_US_CA_IMG

GreenGuard P1450 Siding Underlayment Product Sheet

GreenGuard Fanfold Underlayment Standard Installation Guide

GreenGuard Fanfold Underlayment Standard Installation Guide

CCRR 1022

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

Do you need assistance selecting the right product?

Our teams are dedicated to helping make the process as easy as possible and ensure you get the right materials for your needs.

Contact Us

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

We use cookies on our website www.kingspan.com. To find out more about the cookies we use, or to change your cookie preferences i.e. to remove your consent to our use of certain categories of cookies, please visit our Cookie Policy & Control page.

If you do not click "Accept and close" and continue to use this website, we will assume that you consent to our use of cookies.