Door Sizes Chart

Door size conversion chart

Please see below our helpful door size conversion chart.  If you still work in feet and inches, the chart will help you work out the metric equivalent size of our doors.

HEIGHT & WIDTH

Metric (mm)

Imperial (inches)

Imperial (feet & inches)

1981 x 457 78″ x 18″ 6′6″ x 1′6″
1981 x 533 78″ x 21″ 6′6″ x 1′9″
1981 x 610 78″ x 24″ 6′6″ x 2′0″
1981 x 686 78″ x 27″ 6′6″ x 2′3″
1981 x 711 78″ x 28″ 6′6″ x 2′4″
1981 x 762 78″ x 30″ 6′6″ x 2′6″
1981 x 838 78″ x 33″ 6′6″ x 2′9″
1981 x 915 78″ x 36″ 6′6″ x 3′0″
1981 x 1067 78″ x 42″ 6′6″ x 3′6″
1981 x 1168 78″ x 46″ 6′6″ x 3′10″
1981 x 1220 78″ x 48″ 6′6″ x 4′0″
1981 x 1372 78″ x 54″ 6′6″ x 4′6″
1981 x 1524 78″ x 60″ 6′6″ x 5′0″
2032 x 813 80″ x 32″ 6′8″ x 2′8″
2134 x 915 84″ x 36″ 7′0″ x 3′0″
2040 x 526 80 1⁄4″ x 20 11⁄16″ 6′8 1⁄4″ x 1′8 11⁄16″
2040 x 626 80 1⁄4″ x 24 5⁄8″ 6′8 1⁄4″ x 2′0 5⁄8″
2040 x 726 80 1⁄4″ x 28 5⁄8″ 6′8 1⁄4″ x 2′4 5⁄8″
2040 x 826 80 1⁄4″ x 32 1⁄2″ 6′8 1⁄4″ x 2′8 1⁄2″
2040 x 926 80 1⁄4″ x 36 7⁄16″ 6′8 1⁄4″ x 3′0 7⁄16″

Building Regulations

  • Part A – Structure
  • Part B – Fire Safety
  • Part C – Site preparation and resistance to contaminants and moisture
  • Part D – Toxic Substances
  • Part E – Resistance to the passage of sound
  • Part F – Ventilation
  • Part G – Hygiene
  • Part H – Waste Disposal
  • Part J – Combustion appliances and fuel storage systems
  • Part K – Protection from falling, collision and impact
  • Part L – Conservation of fuel and power
  • Part M – Access to facilities and buildings
  • Part N – Glazing
  • Part P – Electrical Safety
  • Part Q – Security in Dwellings
  • Part R – High Speed Electronic Communications Networks
  • Part 7 – Material and Workmanship

U-values are a measure of thermal transmittance and express the rate of heat transfer through any element of your building, such as the wall, roof, window or indeed any structural component. The higher the figure, the worse the thermal insulation quality. So aim to keep your U-values low.

Because the construction of these elements can vary so much depending on your design and choice of materials, the U-values vary too and hence they need to be calculated specifically for each element. The units used to express U-values are watts per m² Kelvin (W/m²K). This means that if a wall, for example, had a U-value of 1.0 W/m²K, for every degree of temperature difference between the air on the surface inside the wall and the air on the surface outside, 1 watt of heat would pass through any m².

In addition to the Building Regulations, you may be asked to comply with other guidelines including CFSH (Code for Sustainable Homes), SAP (Standard Assessment Procedures), SBEM calculations (Simplified Building Energy Model) and EPC (Energy Performance Certificates).