Kooltherm K15
Rainscreen Board

Kooltherm K15 Steel Frame

Insulation for Rainscreen Cladding Systems

Kingspan Kooltherm K15 Rainscreen Board is a premium performance insulation, with a fiber–free rigid thermoset phenolic insulation core faced on both sides with a low emissivity composite foil facing. The product is used as insulation for rainscreen cladding systems.

The core of Kingspan Kooltherm K15 Rainscreen Board is a premium performance rigid thermoset fiber-free phenolic insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

  • Higher R–value per inch than any commonly used insulation.
  • NFPA 285 compliant.
  • UL Classified.
  • R-value of 16 on 2 in.
  • Negligible smoke developed.
  • ASTM E84 rating of 25/20 (flame-smoke).
  • Clear cavity is maintained - resists moisture penetration.
  • Easy to handle and install.
  • Manufactured with a blowing agent that has zero ODP, low GWP, HCFC and CFC free.

Product Brochure

Kooltherm K15 Rainscreen Board Brochure

Product Information

Product Data Table
Code Compliance
Safety Data Sheet
CSI 3 Part Specification
BIM Objects / CAD Details
Property Test Method Result
Nominal Thickness
(in / mm)
(in / mm)
(in / mm)
1.18 / 30
1.97 / 50
2.95 / 75
Standard Dimensions
Width (in / mm)
Length (in / mm)
47.25 / 1200
96 / 2438
Compressive Strength, Min. 
Water Absorption, Max.
(% by volume)
Density, Min.
ASTM C1621
Closed Cell Content
(% of cells closed)
ASTM D6226
Air Permeance
(L/S/m2) / (cfm/ft²)
ASTM E2178
0.002 / 0.000
Water Vapor Permeance, Max.1
Fire & Smoke
Flame Spread
Smoke Developed
ASTM E84 25

*Contact Kingspan Insulation for available non-stock sizes.

Kingspan Kooltherm K15_Rainscreen Board_Submittal_Interactive_1808_Page_1

Kooltherm K15 Rainscreen Board Submittal

TER 1601-06

Technical Evaluation Report 1601-06 NFPA 285 - Kooltherm Insulation Board

Kooltherm Safety Data Sheet

Kooltherm Safety Data Sheet

Kingspan Kooltherm Section 07 21 00 Building Insulation

Kingspan Kooltherm Section 07 21 13 Phenolic Insulation


CSI 3-Part Specifications

Click the link below to view our CSI 3-Part Specs from ARCAT in a variety of file formats.

Kingspan Insulation CSI 3-Part Specifications

View and Download the Specifications

Kooltherm Insulation Board 15 Year Thermal Warranty

Kooltherm Insulation Board 15 Year Limited Thermal Warranty

Warranty Registration Form 1708 - Interactive_Page_1

Kingspan Warranty Registration Form


BIM Objects / CAD Details

Click the link below to view our BIM Objects / CAD Details from ARCAT

Kingspan Insulation BIM Objects/CAD Details from ARCAT

Download Typical Wall Assemblies

Do you need assistance planning your project?

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



Call: +1(800) 241 4402