1. Acknowledge the problem
Recent figures show that pitched roof claims account for more than £14m of the NHBC’s annual claims spend, with roof-related issues resulting in about 60% of all claims. The updated NHBC Standards Chapter 7.2 Pitched Roofs, published last year, include a number of changes aimed at improving standards and quality.
2. Follow the standards
The NHBC has surveyed 3,000 live sites that adopted the new standards. Where ridges and hips are bedded on mortar, a third of sites surveyed are still using mortar only and not providing mechanical fixings – whereas Chapter 7.2 states that where mortar is used, ridge and hip tiles must also be mechanically fixed. Where verges are bedded on mortar, less than half of the sites used the correct method.
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