Durability + Design
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site


D+D News

Main News Page

Webinar Features Repainting and Permeance

Thursday, March 9, 2017

More items for Maintenance + Renovation

Comment | More

How many times can a commercial building be repainted before problems with moisture occur?

A free Durability + Design webinar scheduled for 11 a.m. to noon, Wednesday, March 15, may help clarify this conundrum.

Registration for “Achieving Quality in Architectural Coatings Work: WUFI Software for Coating Selection” is open now. Participants are eligible for one AIA LU credit.

Problems and Modeling

As the webinar description explains, commercial building walls are commonly constructed of masonry and concrete (e.g., concrete masonry units, cast-in-place and pre-cast).

File photo / KTA-Tator Inc.

The underlying moisture-sensitive coating layers begin to wrinkle and disbond as the lower permeable film causes moisture retention within the substrate, exposing the sensitive coating to lengthy periods of exposure to moisture. This D+D In Depth article discusses the same topic.

As additional coats of paint are applied to the exterior of these buildings, the permeance (breathability) of the film decreases.

As a result, in some climates, moisture becomes trapped within the wall assembly, wetting any in-fill insulation that is present, creating conditions that are conducive to the growth of mold, and eventually causing blistering and detachment of the film.

To determine the number of times a building can be repainted before the reduction in permeance may cause problems, this webinar will discuss the results of thermo-dynamic modelling of four identical buildings in four parts of the country.

The locations are Miami; Providence, Rhode Island; Colorado Springs, Colorado; and Seattle.

Objectives, Presenters

Among other objectives, the webinar will help participants to determine the relationship between the permeance of the coating and water content within the wall assembly and recognize the value of thermal-dynamic modelling (using WUFI-ORNL/IBP software in this case) when specifying coatings for use on building walls.

The presenters for this webinar are Kenneth A Trimber, president of Pittsburgh-based KTA-Tator Inc., and Kevin J. Brown, technical director for the commercial services group at KTA-Tator Inc. Together, the presenters have 55 years of experience in the coatings field.


Tagged categories: Architecture; Coatings education; Education; Maintenance programs; Masonry coatings; Worker training; Workers

Comment Join the Conversation:

Sign in to our community to add your comments.

Keim Mineral Coatings
Mineral Silicate Paints + Stains Fuse to Concrete
• Forms permanent chemical bonds
• Becomes part of the concrete
• Will never peel
• Looks completely natural

Novatek Corporation
Novatek Portable Air Filtration Systems
Air Scrubbers/Negative Air machines for restoration, abatement, dust & odor control, hazardous contaminant removal from job sites to clean rooms and hospitals. Portable, affordable!

Shield Industries, Inc
FireGuard® E-84 Intumescent Coating - Shield Industries, Inc
Trust the certified protection of the industry’s most innovative intumescent coating FireGuard® E-84 to provide you with the 1 and 2 hour fire ratings you need.


Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@durabilityanddesign.com

The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker


© Copyright 2012-2018, Technology Publishing Co., All rights reserved