W.D.Close & Sons Ltd has been assessed and certified as meeting the requirements of ISO3834
TWI ISO 3834 Certification click on link to view
IIW ISO 3834 Certification click on link to view
EWF ISO 3834 Certification click on link to view

W.D.Close & Sons Ltd has been assessed and certified as meeting the requirements of ISO3834
TWI ISO 3834 Certification click on link to view
IIW ISO 3834 Certification click on link to view
EWF ISO 3834 Certification click on link to view