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Cross Laminated Timber (CLT)

MasterFormat 06 17 00 Shop-Fabricated Structural Wood; 06 17 19 Cross-Laminated Timber

This information reflects our best understanding of product composition in 2022.

Cross Laminated Timber (CLT) is a structural engineered wood panel, which can be used to construct walls, floors, and roofs. CLT panels are prefabricated and are constructed to specific building requirements, making them available in a variety of...

More about Cross Laminated Timber (CLT)

Cross Laminated Timber (CLT) is a structural engineered wood panel, which can be used to construct walls, floors, and roofs. CLT panels are prefabricated and are constructed to specific building requirements, making them available in a variety of sizes and configurations. CLT panels are constructed in directional alternating layers using kiln-dried lumber boards. Typically three to seven boards are used, bound with structural adhesives such as polyurethane, emulsion polymer isocyanate (EPI), melamine-formaldehyde, or phenol-resorcinol-formaldehyde adhesives. Formaldehyde-free adhesives, such as polyurethane, were found to be most common. When CLT is specified beyond typical lumber sizes, lumber is finger-jointed and bound with an adhesive. Adhesives used for finger-jointing and between layers may be the same within a product or may be different. This CP assumes the same adhesive for both applications.

A historical version of this CP is available here: Historical: Cross Laminated Timber (CLT) (Engineered Wood) - 2015.

Name % Weight Whole Function GREENSCREEN® Sources
Wood
99.25% Structure Component Subscribe to view
Polyurethane polymer in wood adhesive
0.59% Polymer Subscribe to view
Limestone
1317-65-3
0.12% Filler Subscribe to view
Siloxanes and Silicones, di-Me, reaction products with silica
67762-90-7
0.03% Viscosity Modifier Subscribe to view
Dibutyltin dilaurate
77-58-7
<0.01% Catalyst Subscribe to view
Quartz
14808-60-7
<0.01% Residual Subscribe to view
Name % Weight Part % Weight Whole Function GREENSCREEN® Sources
Wood
99.25% 99.25% Structure Component Subscribe to view
Polyurethane Wood Adhesive
0.75% 0.75% Adhesive Subscribe to view
Polyurethane polymer in wood adhesive
(Nested within Polyurethane Wood Adhesive)
79.29% 0.59% Polymer Subscribe to view
Limestone
1317-65-3
(Nested within Polyurethane Wood Adhesive)
16.52% 0.12% Filler Subscribe to view
Siloxanes and Silicones, di-Me, reaction products with silica
67762-90-7
(Nested within Polyurethane Wood Adhesive)
3.85% 0.03% Viscosity Modifier Subscribe to view
Dibutyltin dilaurate
77-58-7
(Nested within Polyurethane Wood Adhesive)
0.18% <0.01% Catalyst Subscribe to view
Quartz
14808-60-7
(Nested within Polyurethane Wood Adhesive)
0.17% <0.01% Residual Subscribe to view

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Known or Potential Residuals

Known or Potential Residuals for Chemical
CASRN NAME GREENSCREEN® TYPE FREQUENCY % Weight Chemical % Weight Product SOURCE
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Other Process Chemicals

Other Process Chemicals for Chemical
CASRN NAME GREENSCREEN® TYPE FREQUENCY % WT CHEM % WT PRODUCT SOURCES
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Habitable Resources (0)

Habitable Resources for Product
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Sources

Sources for Common Product Data
Source Uploaded Document Linked Document
Academic - Improving durability of cross laminated timber (CLT) with borate treatment
Academic - Isocyanate Wood Binders
Academic - Mechanical and physical properties of Cross-Laminated Timber made from Acacia mangium wood as function of adhesive types
Academic - Melamine–Formaldehyde Adhesives
Akzo_Nobel_Hardener9563_SDS
Akzo_Nobel_Resin1263_SDS
AkzoNobel_SturcturLam_SDS
Alamco_web
AlamcoPentaWood_SDS
Anchorseal_SDS
Anchorseal_UCCoatings
ANSI117-2015
ANSI117-2020
AnthonyForest_CopGuard_SDS
AnthonyForest_Web
APA_Formaldehyde and Engineered Wood
APA_Glulam
ArtMassif_EDS
ArtMassifHPD_EXPIRED
AWAGlulam_EPD
BoozerBeam_SDS
CA2314394C
Cascomel_SDS
CCAWood
CLSAB_Accepted_Adhesives_for_HRA_labelling_2020_09_02
CN103555260B
Cop-8 Treated Wood MSDS
Declare - Cross-Laminated Timber
Declare - CrossLam CLT
Declare - Nordic X-Lam
E5_Declare
E5-Glulam_TDS
Ecobind6500_SDS
EPD - Cradle to Gate EPD for Cross Laminated Timber
EPD - CrossLam CLT
EPD - Nordic X-Lam
Glulam Design Specification
GlulamSizes_CAN
HPD - Nordic Joist
HPD - Nordic X-Lam
Impermaxkr50_web
IpeSeal_SDS
Journal - Emulsion Polymer Isocyanates as Wood Adhesive: A Review
Journal - Revealing the Mechanical Properties of Emulsion Polymer Isocyanate Film in Humid Environments
LeeEtAl_2014
LiEtAl_2004
MSHA
NordicLam_Declare
NordicStructures_HPD
NordicStructures_SDS
Patent - Adhesive composition and method
Patent - Cross laminated timber panel
Patent - Low formaldehyde emission adhesive system
Phenol Resiorcinol Resin MSDS
Preservative Treatment of Glulam
PubChem_DBTDL
Purbond_info
Purbond_SDS
QB_Adhesives
QB_TechInfo
RenThesis_2010
Report - Durability of adhesive bonds in cross-laminated timber (CLT) panel manufactured using Irish Sitka Spruce
Report - Engineered Wood Construction Guide
Report - Identifying Drivers and Barriers for Investment in Oregon’s Mass Timber Manufacturing Supply Chain
Report - Kalesnikoff Cross Laminated Timber
Report - The State of Mass Timber in Canada 2021
RosboroGlulam_SDS
SDS - 3M Scotch-Weld PUR Adhesive TE100
SDS - Aerodux 185
SDS - Hardener HRP-155
SDS - KP-12UVW
SDS - KP-12W
SDS - LOCTITE HB S029
SDS - PURBOND HB E202
SDS - Saduren 163
SealOnce_SDS
Specialty
Specs - Cross-Laminated Timber
Specs - Making Mass Timber Work for High-Rise Residential in BC
Specs - UNIFIED FACILITIES GUIDE SPECIFICATIONS
SPX_WaxEmulsions
StructurLam_Enviro
TDS - 3M Scotch-Weld PUR Adhesive TE100
TDS - Aerodux 185
TDS - KP-12
Timberlam_H1.2_Declare
Timberlam_H3.2_Declare
TM - CLT by Stora Enso
TM - Cross-Laminated Timber
TM - CrossLam CLT
TM - Katerra CLT Product Definition
TM - Nordic X-Lam
US4897291
USDA_WoodSurfaceCoatings
Waxlor_SDS
Website - Cross-laminated timber (CLT)
WO2009070293A1
WonderbondM-700Y_SDS
WonderbonHardener5025A_SDS