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Factory Built Housing Painters Handbook: Chapter 1
Best Practices for Factory Built Housing
As a member of a Factory Built Housing team, you enjoy an advantage. Your work is performed in a protected, secure, indoor environment where, for the most part, conditions can be controlled. Weather is seldom a factor though, in the factory, it can sometimes be a challenge to fully control the greatest impediments to quality paint – temperature and humidity. See All Chapters View Chapter 2: Exterior Painting
Best Practices
Temperature and Humidity
Temperature and humidity can have a significant impact not only on material drying and curing, but also on the general application and touch-up performance of primers and paints. For proper paint application you must monitor and regulate:
Materials Surface Temperature
Ambient Air Temperature
Product Storage Temperature
Temperature fluctuation may affect the degree of coalescence (film formation) of paint. Fluctuations can cause color variations even when material is sourced from the same container. To ensure color and consistency match, touch-up paint should be applied in the same conditions that existed when the paint was first applied to the substrate. Explore Glidden Professional Dealer Products
Storage
Ideally, latex paint materials should be stored and applied in ambient air temperatures about 50°F (10°C) and below 80° F (27°C), with a relative humidity of 50% or lower. Stacking of 5 gallon buckets should not exceed 3 buckets high. Other materials, such as substrates, wallboard, siding, etc., should be stored according to manufacturers’ instructions, away from moisture and extreme temperatures. Containers should be sealed to prevent contamination and degradation. Proper storage can dramatically reduce prep time for materials. When materials are moisture-free and within the recommended temperature range, they are ready for paint application. Because of their tendency to absorb moisture, gypsum products should be stored in a dry environment. Exterior siding and trim materials specified for painting should be stored in dry environments. Surfaces exposed to rain, fog, or high humidity conditions should be allowed to dry thoroughly and to reach the optimum temperature range prior to painting. find the right paint for your project
Low Temperatures
The consistency of paint material is affected by temperature. At 50°F (10°C) or colder, paint material thickens, making it difficult to brush, roll, or spray properly. Applying paint to extremely cold surfaces may affect how well the material “hangs” and adheres to the substrate. For low temperature application, exterior products have been formulated to cure at temperatures as low as 35°F (1.6°C). Compared to conventional exterior products, these products offer faster curing schedules and improved early moisture resistance. While these products can cure at lower temperatures, it is important to note that the rate of drying slows as temperature drops and relative humidity increases. Exposure to temperatures outside of the recommended temperature range at any time during the process may affect curing and system integrity. Learn About Our Pro Painting Services
High Temperatures
Without proper ventilation, condensation may occur on materials that have been stored in cooler areas than the environment in which paint is applied. Abrupt temperature shifts may cause uneven paint application as the materials warm up. This is often the case when materials are transported from cold storage into forced heat painting areas. Dramatic temperature shifts may also cause mud cracking of paint, mudded seams, and cracking of applied texture materials. At temperatures of 85°F (29°C) or higher, paint material thins, creating application problems. Applying paint to extremely hot surfaces may cause paint to dry too rapidly, often causing uneven painted surfaces. Learn What Other Pros are Saying About PPG
Ventilation
Ventilation is a critical component of the painting process. Proper air movement helps to remove moisture (condensation) on stored materials, and equally important, helps to reduce relative air humidity during the curing process of water-based materials.
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Drying Schedules
The industry standard uses 77°F (25°C) and 50% relative humidity as common points of reference for drying times. The drying times information found on product labels and in product data sheets is based on this standard. They are approximate times calculated for ideal conditions.
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