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Revisiting the Four Ds of Wall Design

In 1999, renowned Canadian consultants Donald Hazleden and Paul Morris presented a seminal paper, “Designing for durable wood construction: the 4Ds”, that summarized the 4 D’s (deflection, drainage, drying, and durable – aka, decay-resistant – materials) of successful wall design.

The Perils of Undue Structural Reliance on Lag Screws – Case Study

This AVELAR case study explores certain aspects of the far-too-common tragedy of injuries and deaths resulting from the sudden collapse of balconies and decks.

Mills headshot

The Perfect Storm: Supply Delays and Materials Shortages

WestCon is bringing together a panel of experts, including our Senior Construction Consultant Antony Mills, to discuss the topic.

The Perils of Poor Rim Joist Closure Construction

Despite widespread recognition by modern designers and consultants of the importance of “air barriers”, our firm continues to see litigation claims….

Exceeding the Bounds of Expert Reason and Credibility – Case Studies

In construction defects litigation, opposing parties often present widely divergent assessments of the nature, cause, and extent of purported deficiencies.

Below-Grade Waterproofing Failures – Case Study

In order to highlight fundamental design and construction errors, this paper briefly reviews our firm’s litigation-related evaluation of below-grade waterproofing

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