The CR Smith ‘Triple Guarantee’ for complete peace of mind.

CR Smith is committed to providing our customers with the best product and service available. We have been in business continually for over 45 years and are now in our fifth generation of ten-year guarantee. Our dedicated customer service team is here for our customers, not simply during the installation but for the months and years thereafter.


Lorimer sunroom with floor to ceiling glazing
External view of home with white casement windows
Lorimer sunroom with tilt and turn windows, french doors and blue velvet sofas
Product and installation guarantee icon

Product & installation guarantee

The Lorimer guarantee covers parts, products and workmanship for a full ten years. All electrical items and flooring are covered by the manufacturer’s guarantee. We will never hesitate to honour our obligations under its terms and our dedicated customer service team will handle your queries quickly and efficiently.

Building regulations certificate icon

Building regulations certificate

CR Smith is proud to guarantee that all installations of Lorimer windows and doors meet, as a minimum, the exacting standards of Building Regulations (Scotland) at the time of your installation. This includes:

  • Energy conservation
  • Safety glass
  • Fire escape
  • Handle heights
  • Safe cleaning
  • Ventilation
  • Permissions and warrants
Security guarantee icon

Emergency call out service

CR Smith offers an emergency call out service available 24-hours, 365 days per year so we are available when you need us most. This service covers both problems of a serious nature such as fire hazards, flooding, security risks and the like, as well as more minor (but inconvenient) problems such as customers who have been locked out.

Close up photo of machinery in the manufacturing plant

Security guarantee for windows and doors.

Lorimer windows and doors carry the extra protection of our unique security guarantee. We are so confident in the security they provide that for ten years we will replace any door or window fitted to a brickwork aperture, completely free of charge, should it fail and an unwanted intruder gains entry to your home through the Lorimer frame (excluding glass breakage).


Independent accreditation.

All Lorimer products are manufactured to the highest standards and exceed the requirements of both Scottish building regulations. But you don’t need to take our word for it because our full product range is independently tested and achieve the following British Standards Kitemarks and further accreditation:

BS EN 1279 – 2 & 3 Insulating glass units icon
BS EN 1279 – 2 & 3 Insulating glass units

Our double-glazed sealed units have been successfully manufactured and tested for moisture penetration and gas retention.

BS 7412 Windows & door sets made from PVC-U extruded profiles icon
BS 7412 Windows & door sets made from PVC-U extruded profiles

Specifies the requirements for the design, fabrication and performance of windows and doors.

BS 6375 – 1 Performance of windows 
and doors icon
BS 6375 – 1 Performance of windows 
and doors

Weather tightness and guidance on selection and specification (Part of BS 7412). It specifies the exposure categories related to test pressure levels for air permeability, water tightness and wind resistance for external windows and door sets.

PAS 24 logo icon
PAS 24 Enhanced security performance of windows for domestic applications

Specification for windows and doors manufactured to provide enhanced security against unauthorised forced entry.

Secured by design icon
Secured by design

A police initiative that improves the security of buildings through design and seeks to achieve sustainable reductions in crime.

Quantal Conservatory Roof Systems & Tremco Illbruck Security Glazing Tape icon

Quantal Conservatory Roof Systems & Tremco Illbruck Security Glazing Tape.

BFRC logo icon
BFRC energy rating – ‘A’

All Lorimer windows are manufactured to achieve a U-Value of 1.4W/m2K, which is an ‘A’ energy rating. Although doors do not have a comparable rating scale, Lorimer doors are manufactured to the same high glazing specification as Lorimer windows.

ISO 9001:2008 Quality management systems icon
ISO 9001:2008 Quality management systems

Systems to enhance customer satisfaction through the ability to consistently provide a product that meets customer and statutory.