SBE Builders

Strong Built Establishments Builders

SBE Builders is a commercial and residential framing contractor located in Discovery Bay California. Dedicated to the art of Carpentery & Roof Framing. We are the professionals for the future of the craft of carpentry.

Plywood versus OSB

Plywood and OSB Cost on last lumber bid - 7-15-2008:

Qty: Type Cost per Sheet
1056 CDX plywood 15/32" Struct 1 Exposure 1 4x8 32/16" span rating $13.90
600 OSB 15/32" Struct 1 Exposure 1 4x8 32/16" span rating $13.10
600 CDX plywood 15/32" Struct 2 5-ply Exposure 1 4x8 32/16" span rating $12.75
600 OSB 1/2" Struct 2 Exposure 1 4x8 32/16" span rating $7.85

There's no price savings at all using Struct 1 OSB versus Struct 1 CDX plywood , but there's a big difference in the price for CDX 5 ply plywood versus OSB Struct 2.

APA-EWS web site

SBE Builders will only use CDX plywood or OSB that has a APA rated sheathing stamp with a EXPOSURE 1 stamp. This APA stamp guarantees that waterproof resins and glues were used to bond the CDX plywood or OSB to the wood fibers. EXPOSURE 1 CDX plywood and OSB are made to withstand repeated rainfall with little or no damage during a normal time frame construction project. However, the creep - edge swelling of OSB does pose problems when OSB is used for subfloors that receive ceramic title as a finished floor. Acorrding to Georgia Pacific they have test results stating CDX plywood is stiffer than OSB. This may be true for 3/4" CDX plywood, but when we use 1-1/8" OSB Gold Bond subfloor on our custom homes we've seen excellent results and a very stiff floor, ideal for cermica tile and other heavy surfaces.

cdx plywood struct 1

Georgia Pacific article on plywood versus OSB Versatility, Stiffness, Creep - edge swell. This page is in favor of CDX plywood.
Plywood and Oriented Strand Board (OSB) for Roofs
Stiffness.19/32" plywood is 220% stiffer than 7/16" OSB.
Nail withdrawal strength. 19/32" plywood holds roofing fasteners 46% to 76% better than 7/16" OSB.

Georgia Pacific article on plywood versus OSB Versatility, Stiffness, Creep - edge swell. This page is in favor of CDX plywood.
Plywood and Oriented Strand Board (OSB) for Floors

Article on plywood versus OSB at The Family Handyman. This page has a really good photo of OSB panel edge swelling. This page is in favor of CDX plywood.
OSB is equal to plywood in strength, is slightly cheaper, but is more vulnerable to water damage

Oriented Strand Board Vs. Plywood . This page is in favor of OSB.

Oriented Strand Board Performance at OSB Guide. This page is in favor of OSB.
OSB In Wood Frame Construction Technical Manual

An excellent article comparing Plywood to OSB is available from the University of Massachusetts website. Recently weíve heard that walls in many Southeastern homes covered with the Exterior Finish and Insulation System (EIFS) were rotting. Rigid foam insulation was applied over osb and coated with a stucco-like covering. When the exterior foam boards were removed, wet, rotted, crumbling osb was exposed. Osb was slammed in the press. The problem really isnít osbís fault. All cases Iím familiar with were caused by improper installation of flashing or protective coverings. .
University of Massachusetts

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SBE Builders
SBE Builders
5305 Laguna Ct.
Discovery Bay, California 94505
(925) 634-6022 • Fax: (925) 634-6022
Commercial & Residential Framing Contractor
American Carpenter and Builder
California Licensed General Building Contractor
CA LIC.#  546126

Roof Framing Geometry

  • Roof framing geometry is empirical-type knowledge.
  • Information gained by means of observation, experience, or experiment.
  • From ground Line 0: Z1, Z2, Z3 etc...
  • To Roof Axis 0: A1, A2, A3 etc...
  • To the bring back line 0 for scribing: B1, B2, B3 etc...

Roof Framing Geometry Blog

Rafter Tools for Android
With Quad Tetrahedra Analytic Algorithm Technology.
Helping apprentice carpenters on their journey to becoming master carpenters with Certification in roof framing.

Rafter Tools+ for iPhone

Rafter Tools+ is a rafter calculator for complex roof framing angles that other roof framing calculators don't offer.


Stair Tangent for iPhone

This iPhone app is for rough frame carpenters that don't build stairs everyday, but could use an stair app calculator to check their stair building calculations. Build a set of stairs that you are gonna be proud of. With Stair Tangent you can elimenate cumulative math errors when building - constructing stairs.

Stair Tangent

Crown Molding Tools

Crown Molding Tools  

Carpenters Of Steel

Canadian & American Geometric Roof Framing Development
using a Steel Framing Square

Geometric Roof Framing Development for Irregular Hip Roof Calculations
using a Steel Framing Square

Geometric Development of Tetrahedron
using a Steel Framing Square

Hip Rafter Backing Bevel Angles from 1565 to 2013

Applied Geometry and Euclidean GeometryA lesson in Applied Geometry and Euclidean Geometry

This Is Carpentry

We're a member of the Timber Framers Guild

Timber Framers Guild

American College of the Building Arts, carpentry and timber framing programs.

American College of the Building Arts

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