Section Contents

Popular APA Panel Grades for OSB

 Grade Designation
Description & Common
Use Applications
Performance
Category
 Recommended Thickness
Label in Inches1
(mm equivalent given in brackets)
 Typical
APA
Trademark for
OSB
Available Exposure
Durability
Classification
(BS EN 300 equivalent classification)
APA Rated Sheathing
Unsanded sheathing grade for wall, roof, subflooring and industrial applications such as pallets and engineering design with proper capacities
3/8 PERF
CAT
7/16 PERF
CAT
15/32 PERF
CAT
1/2 PERF
CAT
19/32 PERF
CAT
5/8 PERF
CAT
23/32 PERF
CAT
3/4 PERF
CAT
Thickness 0.354 IN (8.99)
Thickness 0.418 IN (10.62)
Thickness 0.451 IN (11.46)
Thickness 0.483 IN (12.27)
Thickness 0.578 IN (14.68)
Thickness 0.609 IN (15.47)
Thickness 0.703 IN (17.86)
Thickness 0.734 IN (18.64)
Exposure 12
(OSB/2)
Notes:
1  Inches designated because of custom in the USA. Metric mm figure does not appear in the trademark.
2  Equivalent to panel classification OSB/2 – load bearing boards for use in dry conditions – as per BS EN 300 : Oriented Strand Board (OSB) – Definition, classification and specifications.

 

APA Structural 1 Rated Sheathing
Panel grades to use where shear and cross-panel strength properties are of maximum importance.
3/8 PERF CAT
7/16 PERF CAT
15/32 PERF CAT
1/2 PERF CAT
19/32 PERF CAT
5/8 PERF CAT
23/32 PERF CAT
3/4 PERF CAT
Thickness 0.354 IN (8.99)
Thickness 0.418 IN (10.62)
Thickness 0.451 IN (11.46)
Thickness 0.483 IN (12.27)
Thickness 0.578 IN (14.68)
Thickness 0.609 IN (15.47)
Thickness 0.703 IN (17.86)
Thickness 0.734 IN (18.64)

Exposure 12
(OSB/2)

 

APA Rated Sturd-I-Floor
A single layer floor decking comprising of a combination of subfloor-underlayment.  It provides a smooth surface for application of carpet or pad.  Possesses high concentrated and impact load resistance during construction and occupancy.  Touch-sanded. Available as a square edged panel or with a tongue and groove on the two long edges.
19/32 PERF CAT
5/8 PERF CAT
23/32 PERF CAT
3/4 PERF CAT
7/8 PERF CAT
1 PERF
CAT
1-1/8 PERF CAT
Thickness 0.578 IN (14.68)
Thickness 0.609 IN (15.47)
Thickness 0.703 IN (17.86)
Thickness 0.734 IN (18.64)
Thickness 0.849 IN (21.56)
Thickness 0.970 IN (24.64)
Thickness 1.090 IN (27.71)
Exposure 12
(OSB/2)
Notes:
1   Inches designated because of custom in the USA. Metric mm figure does not appear in the trademark.
2    Equivalent to panel classification OSB/2 – load bearing boards for use in dry conditions – as per EN 300 : Oriented Strand Board (OSB) – Definition, classification and specifications.

APA in Europe Wizard

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All Questions OSBPlywood

What is a ‘life cycle stage’ and how do these link to the environmental assessment of whole buildings?

How do core category rules link with environmental product declarations?

Whose responsibility is it to check that wood products being imported into the EU do not originate from illegally sourced timber supplies?

Does the EUTR require mills to provide any extra documentation for customs entry into the European Union?

Must all plywood and OSB panels carry a CE marking?

What is the definition of a construction product under the CPR?

What is a Declaration of Performance referred to under the Construction Products Regulation?

What is the difference between Structural 1 and Exposure 1?

Does structural panel siding have shear values?

What are mould and mildew, and do they compromise the integrity of engineered wood?

The CE-mark on an APA plywood panel means it conforms to European Standards – but which ones?

I want to use a Rated Sheathing panel for flooring/ roofing application, what info do I need to know?

Plywood: Span rating
OSB: Span rating

What extra strength benefits do Structural 1 OSB panels provide over standard Rated Sheathing panels?

Do APA panels give off formaldehyde?

Plywood: Formaldehyde
OSB: Formaldehyde

What is the difference between a touch-sanded panel and sanded panel?

I’d like to know how APA veneer grades match those given in the European standards

How do I correctly gauge the face appearance a plywood Siding panel?

I want to specify an APA panel for concrete formwork – what do I need to know?

Are APA panels tongue and grooved on all four edges?

I am not familiar with the term ‘Sized for Spacing’ – what is its significance?

How are Performance Category and thickness related?

I’d like to know more about a panel’s Span Rating and how it links to thickness.

Plywood: Span rating
OSB: Span rating

What is Span Rating on the APA trademark and why is it important?

Plywood: Span rating
OSB: Span rating

What is the difference between Exposure 1 and Exterior plywood panels? What are their appropriate uses?

What are the main OSB panels likely to be available in Europe?

What are the main plywood panels likely to be available in Europe?

What are the main European standards that I would need to be aware of for OSB panels?

The main standards are: EN 13986 and EN 300

What are the main European standards that I would need to be aware of for plywood panels?

The main standards are: EN 13986, EN 636, EN 314, EN 635-3