FENSA stands for the Fenestration Self Assessment Scheme. Fensa has been set up by the Glass and Glazing Federation (GGF) in response to Building regulations for double glazing companies in England and Wales. Shield is a Fensa double glazing registered company which means all our customers are offered greater protection when purchasing double glazing for their home. All our installations comply with the current building regulations and our installers have undergone inspection so we can self certify that our work passes building regulations. On completion of work, a FENSA certificate is issued to the homeowner which needs to be kept safe as it will be requested by solicitors when you come to sell your home. The certificate offers guarantee to cover the costs of completing rectification work in respect of defect.