profil65
2022-08-01 22:27:15
- #1
In the 80s, seals in windows were common. If the existing 40-year-old middle seals(?) are professionally replaced, the windows are good again and often just as tight as new windows! Of course, only if the windows can otherwise also be professionally overhauled/maintained (paint/hardware/...).
Additional overlay seals in the sashes on the room side in old 40-year-old windows as an after-installation is useful in individual cases. It brings only minor advantages if the house has been/will be significantly upgraded energetically (insulation + airtightness). As a single measure, it brings almost nothing.
Glass replacement with modern standard insulating glass with Low e coating, thermally improved glass edge composite coating, glass filling (Ug 1.1) is then also a must (this is subsidized!). The difference between double glazing Ug approx. 2.7 - 2.9 W/m²K and double insulating glass Ug 1.1 is significant! An energy consultant is mandatory.
If weather protection strips (thermally improved, with cover strip) are done as well, the windows will be brought up to a level that corresponds almost to today's standard windows.
Additional overlay seals in the sashes on the room side in old 40-year-old windows as an after-installation is useful in individual cases. It brings only minor advantages if the house has been/will be significantly upgraded energetically (insulation + airtightness). As a single measure, it brings almost nothing.
Glass replacement with modern standard insulating glass with Low e coating, thermally improved glass edge composite coating, glass filling (Ug 1.1) is then also a must (this is subsidized!). The difference between double glazing Ug approx. 2.7 - 2.9 W/m²K and double insulating glass Ug 1.1 is significant! An energy consultant is mandatory.
If weather protection strips (thermally improved, with cover strip) are done as well, the windows will be brought up to a level that corresponds almost to today's standard windows.