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Kingspan Insulation
3/8" x 4' x 48' GreenGuard® FQ350 Reflective Fanfold Siding Underlayment
QXO product C-466652 · 1 options
Selected: PBP GG FQ350 FANFOLD 3/8" 2SQ
QXO SKU 466652 · Product number PBPGGFQ350
Free, no-obligation quote. Our team confirms local availability, required quantities, compatible components, and installation pricing.
Selected option specifications
- UOM
- BDL
- Item Weight
- 20.175
- Algae Resistance
- No
- Applicable Standards
- Intertek CCRR 1022 CA BEARHFTI Lic. No. 1506 Canada CCMC 12764-R UL LLC - See Classification Certificate A1841 MN Dept. of Energy
About this product
Kingspan GreenGuard® Q350 Siding Underlayment comprises thick closed-cell extruded polystyrene (XPS) in fanfolded bundles. It is lightweight and easy to cut and install. It is designed to be used as a "leveling board," adding insulation and moisture protection in installation of new vinyl siding over old siding. Kingspan GreenGuard® FQ350 Siding Underlayment has the added feature of a reflective surface on one side for added energy efficiency.



