Glasgow: 0141 447 0286 - Dumbarton: 01389 761200 - Helensburgh: 01436 660058
Leonard Builders

Technical Specification

 

Thermal Efficiency

Sheerframe windows and doors can achieve a U value as low as 0.8 W/m2k and  DWER Domestic Window Energy Ratings of A.
Co-extruded weather seals ensure maximum air and water tightness and prevent heat being lost easily through drafts.
Our multiple chamber profile designs to reduce thermal conductivity.
Patented Thermlock reinforcement system with steel, aluminium or FP reinforcing encapsulated in thermoplastic compound.  Provides maximum strength without compromising on thermal performance.
A range of intelligent glass and spacer bar combinations can be specified to maximise solar gain and heat retention and minimise condensation.
 
Performance, Security & Safety

All products can be specified as 'Secured By Design' and are internally glazed to prevent illegal entry by removal of the glazing beads.
All products have undergone a series of stringent tests and have relevant industry accreditations.
Our co-extruded seals that are welded at the corners provide exceptional high levels sound insulation

Styling & Appearance

Our 70mm profile replicates the dimensions of a traditional timber window and is bevelled for a more stylish looking window.
Conventionally styled casement windows feature slim sightlines.
A range of foiled woodgrain options or any standard RAL colour.
Our tilt and turn range have concealed gearing.

Environmentally Sustainable

Sheerframe profile is organic stabilised and a lead free profile ensuring safety for manufacturers and our end users. 
Our pvcu frames have around 50 or more years durability and are 100% recyclable at the end of use making pvcu a sustainable material choice.