U-Value Calculations

We can supply individual 'U-Value Calculations' for you, contact us with your requirements.

NEW Part L for Insulation Building Regulations - October 2010

The new building regulations have increased requirements to as high as U 0.16 .
We already have ready made solutions using foil insulation for U values down to as low as U 0.11. There are a variety of solutions satisfying the existing regulations and have developed new solutions for the new increased regulations.

Different elements within a building have differing targets, as can be seen in this table:

ElementOldNew
Sloping roof0.200.18
External Wall0.300.28
Floor0.250.22
Ceiling Level0.160.16
Flat roof0.200.18

We have a range of solutions to meet these new insulation u-value calculations which achieve or exceed the new regulations.

Please print off any relevant calculations for your building inspector, these are surveyor certified U-Value Calculations.

Ceiling Level Insulation - 2010 U-value required U 0.16

DUET Solution (Superfoil only)
U 0.13 Use SF40 + SF40 Over or under rafters (Exceeds the new Regulations)

Combination Solutions (Superfoil plus another insulation)
U 0.16 Use SF19 + 150mm Glassfibre between rafters

Sloping Roof / Flat Roof Insulation - 2010 U-value required U 0.18

DUET Solutions (Superfoil only)
U 0.18 Use SF40 + SF19 over or under rafters
or
U 0.13 Use SF40 + SF40 Over or under rafters (Exceeds the new Regulations)

Combination Solutions (Superfoil plus another insulation)
U 0.18 use SF40 + 35mm Insulated Plasterboard below rafters
or
U 0.18 use SF19 + 90mm of HD Foam board between rafters
or
U 0.18 use SF40 + 50mm of HD Foam board between rafters

Floor Insulation - 2010 U-value required U 0.22

U 0.22 use SFUF + 50mm HD Foam Board

External Wall Insulation - 2010 U-value required U 0.28

U 0.25 Use SF40 in a solid & Stud wall (Exceeds the new Regulations)
Or
U 0.24 Use SF40 stone wall (Exceeds the new Regulations)
Or
U 0.13 SF40 + SF40 in a timber wall (Exceeds the new Regulations)