Exterior Walls - Foam or Housewrap over OSB/Non-Insulated Sheathing

There's a Dow insulation solution that's right for every Exterior Wall application.

An insulating solution for every wall.

Wood framing (studs, window and door framing, and headers) makes up about 25% of the wall surface. Insulating only the cavities means 25% of the wall surface is left uninsulated. A continuous layer of STYROFOAM™ extruded polystyrene or polyisocyanurate insulation installed directly over OSB, or over other non-insulating sheathing reduces energy loss. And, it can reduce the potential for condensation and resulting moisture problems in your walls. STYROFOAM WEATHERMATE™ housewrap provides an air/rain barrier to reduce air infiltration but does not insulate.

There's a Dow insulation solution that's right for every Exterior Wall application:

My project or needs are:	Recommended Product Solution	Installation Instructions/Considerations	Building Code Compliance
Good R-value, reduced air infiltration and excellent moisture resistance.	STYROFOAM Residential Sheathing	View Installation Instructions Foam Over OSB - Installing STYROFOAM Residential Sheathing, Tongue & Groove, Square Edge, DURAMATE™ Plus, TUFF-R™, Super TUFF-R™ or THERMAX™ for use as a weather-resistive barrier	Meets IBC/IRC requirements for foam plastic insulation. See ICBO-ES ER 2257, BOCA-ES RR 21-02, NES NER 699, Und. Lab. Inc.^® Classified, see Classification Certificate D369.
	STYROFOAM Tongue & Groove	View Installation Instructions Foam Over OSB - Installing STYROFOAM Residential Sheathing, Tongue & Groove, Square Edge, DURAMATE Plus, TUFF-R, Super TUFF-R or THERMAX for use as a weather-resistive barrier	Complies with ASTM C 578 Type IV. Meets IBC/IRC requirements for foam plastic insulation. See ICBO-ES ER 2257, BOCA-ES RR 21-02, NES NER 699, Und. Lab. Inc.^® Classified, see Classification Certificate D369.
Good R-value, reduced air infiltration, high durability and excellent moisture resistance.	STYROFOAM DURAMATE Plus	View Installation Instructions Foam Over OSB - Installing STYROFOAM Residential Sheathing, Tongue & Groove, Square Edge, DURAMATE Plus, TUFF-R, Super TUFF-R or THERMAX for use as a weather-resistive barrier	Meets IBC/IRC requirements for foam plastic insulation. See NES NER 699, Und. Lab. Inc.^® Classified, see Classification Certificate U589.
Highest R-value and reduced air infiltration.	TUFF-R	View Installation Instructions Foam Over OSB - Installing STYROFOAM Residential Sheathing, Tongue & Groove, Square Edge, DURAMATE Plus, TUFF-R, Super TUFF-R or THERMAX for use as a weather-resistive barrier	Complies with ASTM C1289 Type I, Class 1. Meets IBC/IRC requirements for foam plastic insulation. See NES NER 616.
Highest R-value and reduced air infiltration.	THERMAX Sheathing	View Installation Instructions Foam Over OSB - Installing STYROFOAM Residential Sheathing, Tongue & Groove, Square Edge, DURAMATE Plus, TUFF-R, Super TUFF-R or THERMAX for use as a weather-resistive barrier	Complies with ASTM C 1289 Type I, Class 2. Meets IBC/IRC requirements for foam plastic insulation. See NES NER 681.
Highest durability and highest R-value and reduced air infiltration.	Super TUFF-R	View Installation Instructions Foam Over OSB - Installing STYROFOAM Residential Sheathing, Tongue & Groove, Square Edge, DURAMATE Plus, TUFF-R, Super TUFF-R or THERMAX for use as a weather-resistive barrier	Complies with ASTM C1289 Type I, Class 1. Meets IBC/IRC requirements for foam plastic insulation. See NES NER 616.
High durability, good R-value and reduced air infiltration.	STURDY-R™	View Installation Instructions	Complies with ASTM C1289 Type II, Class 2. Meets IBC/IRC requirements for foam plastic insulation. NES NER 540.
Don't require insulation, but need a housewrap that resists air infiltration and water penetration with superior tear resistance.	STYROFOAM WEATHERMATE™ Housewrap	View Installation Instructions	See NES NER 593. Complies with ASTM C1677 Type II.
	STYROFOAM WEATHERMATE™ Plus Housewrap	View Installation Instructions	See NES NER 640. Complies with ASTM C1677 Type I.