Cavalok Building Products is celebrating following the results of rigorous fire tests to BS EN 1363 standards on its cavity closers by Chiltern International Fire.

The company’s 100mm -150mm cavity closers achieved greater than 60 minute integrity in a timber frame construction and over 90 minutes in masonry.

The tests were commissioned by Cavalok in response to the need for greater fire assessment of cavity closers. Further tests are being carried out on Cavalok’s new cavity closer ranges to achieve even higher fire ratings.

“This comprehensive testing will enhance specifier confidence in the Cavalok range even further,” said Robert Cridford, Technical and Design Manager at Cavalok. “The testing recreates the ‘flashover’ point in a building fire, subjecting our products to an intense 1000°C furnace until the product fails. We found that our product outlasted the timber frame construction it was mounted in, a great result which ensures there are no doubts about Cavalok closers.”

“We were delighted with how our post-consumer recycled PVC-U performed in the furnace. As predicted, it performed as well as virgin material, giving further evidence of the viability of production from post-consumer material.”

The latest series of tests will allow customers to easily satisfy Part B (Fire safety) Building Regulations.

Preparations for the next series of tests are taking place, which include a number of products within Cavalok’s new ranges. These will be available once the testing process is completed.

Cavalok is the only manufacturer of BBA-accredited cavity closure systems made from 100% post-consumer recycled PVC-U. The Cavalok product range is widely used for brick/block, steel and timber frame buildings in the new build residential and commercial sectors. The BigBlok, Economy and Cavalok products speed up installation of windows on site, as well as improving the energy efficiency of buildings in line with Part L (Conservation of fuel and power) Building Regulations.

Email: john@dragonflypr.co.uk