U-Values for Wooden Lift and Slide Patio Doors

Thermal insulation and energy efficiency are among the most important parameters to consider before purchasing a new lift and slide door. U_w values, also known as the heat transfer co-efficient, can help when selecting a new door. The co-efficient calculates amount of heat loss through the product over a given time period. The lower the u-value, the more insulating the product.

U-Values for the Classic IV 68 Profile

Spruce

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,1	1,2	1,2	1,2
1,0	1,1	1,2	1,1	1,1
0,7	1,1	Not possible in this system.	Not possible in this system.	Not possible in this system.
0,6	1,1	Not possible in this system.	Not possible in this system.	Not possible in this system.

Table of Uw values for Classic IV 68 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Pine, Larch & Meranti

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,2	1,3	1,2	1,2
1,0	1,2	1,2	1,2	1,2
0,7	1,2	Not possible in this system.	Not possible in this system.	Not possible in this system.
0,6	1,2	Not possible in this system.	Not possible in this system.	Not possible in this system.

Table of Uw values for Classic IV 68 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Oak and Eucalyptus

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,5	1,4	1,3	1,3
1,0	1,5	1,3	1,2	1,2
0,7	1,5	Not possible in this system.	Not possible in this system.	Not possible in this system.
0,6	1,5	Not possible in this system.	Not possible in this system.	Not possible in this system.

Table of Uw values for Classic IV 68 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Classic IV 68 - Profilschnitt

U-Values for the Classic IV 78 Profile

Spruce

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,1	1,2	1,1	1,1
1,0	1,1	1,2	1,1	1,1
0,7	1,1	1,1	1,0 (0,99)	1,0 (0,98)
0,6	1,1	1,0	1,0 (0,96)	0,9 (0,94)

Table of Uw values for Classic IV 78 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Pine, Larch, and Meranti

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,2	1,2	1,2	1,2
1,0	1,2	1,2	1,1	1,1
0,7	1,2	1,1	1,0	1,0
0,6	1,2	1,1	1,0 (0,99)	1,0 (0,97)

Table of Uw values for Classic IV 78 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Oak and Eucalyptus

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,5	1,3	1,2	1,2
1,0	1,5	1,3	1,2	1,2
0,7	1,5	1,2	1,1	1,1
0,6	1,5	1,1	1,0	1,0

Table of Uw values for Classic IV 78 profiles according to DIN EN 10077-1, see comments 1) 2) 3)

Classic IV 78 - Profilschnitt

Reference size 3500 x 2180mm
Calculated according to DIN EN 10077-2 : 2012-06 "Thermal performance of windows, doors and shutters - Calculation of the thermal transmittance".
Values taken from data sheet of the "warm edge" working group

How Are the U-Values of a Wooden Lift and Slide Patio Door Calculated?

With a wooden lift and slide patio door, the U_w-values are calculated using the individual u-values of the window frame (U_f) and glazing (U_g). For the sake of comparison, a reference size of 3500 x 2180mm was used for the calculation. The patio door's exact u-values will differ depending on its dimension.

To improve the value and insulation, a thermally separated edge warm edge seal can be added to insulating glass.

The heat transfer coefficient of a wooden lift and slide patio door determines whether the product can be suitable for passive houses. Energy savings not only protect the environment, they can also make an immediate difference to energy bills.

The difference between a U_w-value of 3.5 W/(m²k) and 0.83 W/(m²k) can make a difference of more than 1000 litres of heating oil per year for an area of 30 m².

Order wooden lift and slide patio doors online at low prices

Configure wooden lift and slide patio doors now

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,5	1,3	1,2	1,2
1,0	1,5	1,3	1,2	1,2
0,7	1,5	1,2	1,1	1,1
0,6	1,5	1,1	1,0	1,0

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,5	1,3	1,2	1,2
1,0	1,5	1,3	1,2	1,2
0,7	1,5	1,2	1,1	1,1
0,6	1,5	1,1	1,0	1,0

U_g glazing	U_f frame	U_w sliding door Insulation glazing edge compound e.g. aluminium[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. TGI[W/m2K]	U_w sliding door Insulation glazing edge compound e.g. Swisspacer Ultimate[W/m2K]
1,1	1,5	1,3	1,2	1,2
1,0	1,5	1,3	1,2	1,2
0,7	1,5	1,2	1,1	1,1
0,6	1,5	1,1	1,0	1,0