DuPont Tyvek

Tyvek® proven to outperform cheaper products in a complex market

  • 5 Sep 2018

Tyvek® has been proven to provide lasting performance and peace of mind, where cheaper membranes fail.

This comes after the revelatory results in the 2016 tests for watertightness in ‘real life’ roofs, which were followed by a further 20% of roofs being opened with their membranes tested under the same strict, independent criteria.

The percentages speak for themselves: 94% of roofs over 20 years old fitted with Tyvek® pass with flying colours.

These stats are more impressive when you consider that roofs less than 10 years old fitted with other underlays saw only 21% remain watertight, demonstrating why Tyvek® is such a highly trusted product.

Concerned by multiple reports of some alternative vapour-open underlays failing in their secondary water shedding role, Tyvek® instigated a thorough investigation into ‘real world’ performance two years ago.

These reports put the reputation of a whole class of roofing underlays at risk, and as industry codes have yet to catch up, it was right that the market leader stepped up to investigate the issue.

Qualities such as long term water hold out – which most crucially affects the homeowner – can only be effectively assessed after exposure to natural environmental stresses, both during the build and when occupied.

While ageing of underlays can positively affect vapour diffusion with increased porosity, this may adversely affect the water shedding function, should the primary covering fail.

This unfortunate occurrence is becoming more prevalent in today’s increasingly stormier weather. Ultimately, the primary quality in terms of membrane longevity is watertightness – an area which presents the most risk for property, insurance, and reputations.

All membrane samples were taken from the roofs and the tests were performed by an independent expert, using the EN13859-1&2 W1 classification system for watertightness.

Each specimen was exposed to a 20cm water column for two hours to measure not only whether any leakage occurred, but how much, over what surface area and how quickly.

This established, in crucial and revealing detail, precisely how well each underlay withstood water after 5 to 10 years in a roof, or, in the case of Tyvek®, for more than 20 years.

The following link features an updated page on these ageing tests, which includes a short video and a summary of the findings http://tyvek.construction.dupont.com/rooftest

DuPont Protection Solutions
BBSP1
Bristol & Bath Science Park
Dirac Crescent
Emersons Green
Bristol
BS16 7FR

Phone: 08444 068 722

Technical enquiries: [email protected]

Visit DuPont Tyvek's website

Leave a Reply

Latest news

EverEdge

2020s - the green decade according to EverEdge

EverEdge are looking at the 2020s as being an opportunity to improve its green credentials, whilst also exploring what the company has done in the last decade.

Posted in Articles, Building Industry News, Garden, Health & Safety, Landscaping, news, Posts, Site Preparation, Sustainability & Energy Efficiency, Waste Management & Recycling

Kingspan TEK

Kingspan TEK Gets Sporty at New Pavilion

The Kingspan TEK Building System of structural insulated panels (SIPs) has provided the bespoke, thermally efficient shell for a minimalist pavilion at Eton College’s Willowbrook Outdoor Sports Centre.

Posted in Articles, Building Industry News, Building Products & Structures, Building Services, Case Studies, Cladding, Insulation, Posts, Restoration & Refurbishment, Retrofit & Renovation, Walls

Pop Up Power Supplies

Powering a safe, sustainable future for Britain’s heritage buildings with Pop Up Power

Pop Up Power Supplies® range of power units are ideal for use at many of the United Kingdom’s historic buildings and heritage sites, due to the simplicity and safety they offer.

Posted in Articles, Building Industry News, Building Services, Facility Management & Building Services

Closomat

Norfolk gets, and gives, best value with Closomat

Best value for everyone is being delivered as a result of ‘joined up’ thinking by project teams at a local Council, with the help of Closomat; the end results of which will help deliver a unique tourism opportunity.

Posted in Accessibility, Articles, Bathrooms, Bedrooms & Washrooms, Building Industry News, Building Regulations & Accreditations, Case Studies, Health & Safety, Interiors, Posts