GreenGuard
Q250 / FQ250 Fanfold Underlayment

GreenGuard Q250_FQ250 Siding Underlayment_US

For use in Replacement Siding Operations to Provide a Level Surface Over Old Siding, Add Insulation and Weather Protection

When every penny counts, you can rely on the performance of our most economical fanfold siding underlayment. The Q-Series products have an extruded polystyrene foam (XPS) core with high-impact polystyrene capsheets on both sides, which make it one of the most durable products currently available. These products are also perforated to allow potentially harmful moisture vapor to escape so that it does not become trapped in the wall.

Product Brochure

GreenGuard Q250_FQ250 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 Q250 FQ250
Thermal Resistance, R-Value1
(oF-ft2-h/Btu)
ASTM C518
(@ 75oF Mean Temperature)
0.9 2.93
Water Vapor Permeance
(perm)
ASTM E96
Desiccant Method
1.7 1.7
Water Absorption
(max,% by Volume)
ASTM C272 2.0 2.0
Fire Characteristics2
Flame Spread
Smoke Developed
ASTM E84/UL 723 25
250
10 (Class A)
45-140
Dimensions / Packaging
  Q250 FQ250
Length
48 ft. 48 ft.
Width 4 ft. 4 ft.
Square Feet/Pallet 13,056 13,056

1 Specimens were aged and tested in accordance with FTC Rule (16 CFR, Part 460) and ASTM C 578.

2 These numerical flame spread and smoke ratings are not intended to reflect hazards presented by this material under actual fire conditions.

3 System R-value is calculated in accordance with the “ASHRAE Handbook of Fundamentals” using a ½” uniform parallel dead air space. The R-Value of this product installed without an air space is 0.9.

GreenGuard Fanfold Underlayment Standard Installation Guide

GreenGuard Fanfold Underlayment Standard Installation Guide

CCRR 1022 1901

Code Compliance Research Report 1022 - Fanfold Underlayment

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

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

GreenGuard Reflective Sheathing & Siding Underlayment Safety Data Sheet

GreenGuard Reflective Sheathing & Siding Underlayment Safety Data Sheet

GreenGuard XP-Series Siding Underlayment Technical Bulletin #17

GreenGuard XP-Series Siding Underlayment Energy Chart

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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