Useful information

Frequently Asked Questions

Q. How do I book a quotation?

A. You can either call our office on 020 8298 0068 to book a free no obligation quote. Or fill in our online form, where a member of our team will contact you.

Q. How do I book an installation date?

A. If you decide to go ahead with our quotation, you can contact our office and a installation date will be provided that suits. We will then be in contact to carry out the final survey.

Q. Will I be pressured on my appointment?

A. No not atall, we do not quote on site so you don’t have to make a decision there and then. All our quotes are free and no obligation so there is no pressure to buy.

Q. What is FENSA?

A. FENSA stands for the Fenestration Self-Assessment scheme. It has been set up by the Glass and Glazing federation (GGF) and other industry bodies, with government encouragement in response to the Building Regulations.

Q. How do I know if my windows are energy efficient?

A. You can check the energy efficiency of a window by looking at the BFRC label, which is also known as a ‘rainbow label’. The higher the energy rating, the more energy efficient it is.

Q. When will I receive my Fensa certificate?

A. FENSA certificates are issued by FENSA. SDG will notify FENSA that we have installed a product at your address and FENSA will then send your certificate to you direct this can take up to 6 weeks.

Q. What does the QANW logo mean?

A. Use of the QANW logo simply demonstrates that the installer has the facility to insurance back their own guarantee to the customer.



Sovereign collection

View our Sovereign collection. Our complete range of 44mm composite doors.


Solidor Brochure

View our Solidor brochure.


Continental Collection Brochure

View our Continental Collection


Eco Energy Plus Brochure

  • 6 chamber system
  • 100% lead free
  • ‘A’ rated