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New Gypsum Board II

At times, negative issues have risen between the industry trades of gypsum board finishing, paint and wallcovering application. Rather than remain in a foggy, unclear understanding or worse operate under a false assumption of following the way “it has always been done”, we are sharing the industry standards of how to prepare and finish new gypsum board. Accurate knowledge combined with technical skills usually saves aggravation and helps to avoid “he said, she said” lawsuits. This “Paint Application” section describes different paint methods as the final decoration over new interior gypsum board surfaces.

A Comprehensive Guide to Painting & Finishing Interior Gypsum Part II

It is very important to understand primers and paints need to be applied to the surface not only with the recommended tools or applications, but just as important are the drying times between coats. Before applying a coat of material, the surface and or previous coating needs to be checked that it is dry. Do not follow the time period recommendation from the manufacturer, meaning, “This material can be recoated in 1 hour”.

The temperature and humidity has an impact and regulates the drying times of these materials. Following the manufactures recommendations for the type of application, checking for dryness between application of coats, and keeping the humidity and temperature within the recommended ranges are all key items for a successful Paint Application.

Note: The type of primer and responsibility can be specified in either the gypsum board specification or the paint specification. It is the architect/specifier’s responsibility to direct who will apply this material. Knowing this information, ensure that the primer (what type) is specified in your specifications before bid time.

There are four Paint Application Levels regarding new gypsum board to consider:

Paint Application 0

Requirements

No application required

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Paint Application 1

Requirements

One (1) coat of primer applied to the surface. The primer shall be applied to achieve the (DFT) specified by the manufacturer.

General Information

 This application can consist of a coat of primer

 This application is typically specified where a final decoration will be applied at a later             time.

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Paint Application 2

Requirements

One (1) coat of primer and one (1) top coat of paint applied to the surface. The primer and the top coat of paint shall be applied to achieve the (DFT) specified by the manufacturer.

Primer …………………………….. 1 coat

Paint ………………………………. 1 coat

General Information

 The application of the primer and top coat of paint can be sprayed and not back             roll(ed).

 If paint and primer in one is used, see manufacturer’s recommendations.

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Paint Application 3

Requirements

One (1) coat of primer and two (2) top coats of paint applied to the surface. The primer and the top coats of paint shall be applied to achieve the (DFT) specified by the manufacturer.

Primer …………………………….. 1 coat

Paint ………………………………. 2 coats

General Information

 The application of the primer and the top coats of paint shall be rolled or sprayed and             back roll(ed).

 If paint and primer in one is used, see manufacturer’s recommendations

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Paint Application 4

Requirements

One (1) coat of primer and three (3) top coats of paint applied to the surface. The primer and the top coats of paint shall be applied to achieve the (DFT) specified by the manufacturer.

Primer …………………………….. 1 coat

Paint ………………………………. 3 coats

General Information

 It is recommended when a deep tone color or gloss paint is used with this application,   that a drywall completion coat material is used as the primer. Then a sealer is     applied over the drywall completion coat material (the sealer can be tinted and          can also be considered as one of the 3 final coats of paint), then followed with            two (2) top coats of paint.

 The application of the primer and the top coats of paint shall be rolled or sprayed and             back roll(ed).

 If paint and primer in one is used, see manufacturer’s recommendations

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There are six Gloss Levels of interior paint for new gypsum board to consider:

Conventional latex is a standard performance latex system which provides suitable performance for residential use and “light use” areas in commercial and industrial installations such as offices and meeting rooms.

Gloss Level 1 – Flat or Matte

Recommendation Location

Typically specified on large, smooth or textured surfaces. Recommended to be applied over Gypsum Board Levels 3, 4 or 5 Finishes. A Paint Application 3 is recommended when a Gloss Level 1 is used for final decoration. If a Gloss Level 1 is used in areas that are recommended for a Gypsum Board Level 2, then a Paint Application 2 can be applied.

Pros - Very easy to touch-up. Minimizes visibility of surface blemishes.

Cons - Easily marked and stained. Not recommended for surfaces exposed to constant             contact, where burnishing and dirt pick-up would be excessive.

Gloss@ 60°: Max. 10 units *

Sheen@ 85°: Max. 35 units *

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Gloss Level 2 – Low Sheen

Recommendation Location

Typically specified on wall surfaces such as offices and other low traffic areas. Recommended to be applied over Gypsum Board Level 3 (with texture) or a Gypsum Board Level 5. A Paint Application 3 is recommended when a Gloss Level 2 is used for final decoration.

Pros - Ease of touch-up, uniform appearance marks less then Gloss Level 1.

Cons - Marks easier and is less washable then Gloss Level 3.

Gloss@ 60°: Max. 10 units *

Sheen@ 85°: 10–35 units *

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Gloss Level 3 – Eggshell

Recommendation Location

Typically specified where a balance of washability and durability while avoiding an overly glossy appearance is a concern. Recommended to be applied over Gypsum Board Level 5. A Paint Application 3 is recommended when a Gloss Level 3 is used for final decoration.

Pros - Washability

Cons - Shows substrate blemishes

Gloss@ 60°: 10–25 units *

Sheen@ 85°: 10–35 units *

Gloss Level 4 – Satin

Recommendation Location

Typically specified where the Gloss Level provides a higher level of durability, but sheen accents surface defects. Recommended to be applied over Gypsum Board Level 5. A Paint Application 3 is recommended when a Gloss Level 4 is used for final decoration.

Pros - Washability

Cons - Shows substrate blemishes and reflects light somewhat

Gloss@ 60°: 20–35 units *

Sheen@ 85°: Min. 35 units *

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Gloss Level 5 – Semi-Gloss

Recommendation Location

Typically specified where washability and abrasion resistance properties are most important. Recommended to be applied over Gypsum Board Level 5. A Paint Application 3 is recommended when a Gloss Level 5 is used for final decoration.

Pros - Resistant to stains and dirt retention

Cons - Difficult to touch up and shows substrate blemishes

Gloss@ 60°: 35–70 units *

Sheen@ 85°: —–

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Gloss Level 6 – Gloss

Recommendation Location

Because this Gloss Level reflects light from the surface of the coating like a mirror, it is rarely used, except on smooth surfaces and trim work.

Recommended to be applied over Gypsum Board Level 5. A Paint Application 4 is recommended when a Gloss Level 6 is used for final decoration.

Pros - Ease of clean up (i.e. washability) and abrasion resistant.

Cons - Highly light reflective and shows all substrate blemishes. Very difficult to touch    up.

Gloss@ 60°: 70–85 units *

Sheen@ 85°: —–

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* The gloss and sheen level requirements may be different per paint manufacturer, please refer to manufactures recommendations or specifications.

Please see Part I – New Gypsum Board in General to gain a clear understanding of correct framing, gypsum board installation and finishing. It is important to know what responsibilities are connected to the professional painting company versus the gypsum installation operation. PPT will continue with Part III – New Gypsum Board – Levels of Finish.

Source: The Interior Guide

This “Interior Guide” is to serve as a guideline and is not intended for any specific construction project. This “Interior Guide” makes no warranty, guarantee, expressed or implied. This is considered to be a “living document” and is subject to be edited, updated and or removed at the discretion of “advisory committee” without notice. The most updated version will be on the WCC website (www.wccinfo.org). Please reference the website as needed to ensure you have the most recent version