Yet a poorly closing entrance door or a draughty stairwell window causes significant heat loss in winter.
Decisions on windows and doors that form part of common property, stairwell windows, the entrance gate, basement openings, fall to the general meeting. Replacing windows in individual flats, by contrast, is the owner's own decision and cost.
The cost depends greatly on the size and material of the units and on whether a design matching a protected facade is required: in a listed building this can significantly increase the cost.
Financing typically comes from the renovation fund. For a larger, full facade window replacement it is worth linking the project to insulation works or a grant application, as energy grants usually treat window replacement as an eligible item.
An often underestimated factor is installation quality: even a high quality window underperforms if the installation leaves gaps or thermal bridges, so references and installation warranty matter as much as price.
If the project can be scheduled, it is best carried out in the months before the heating season so residents feel the reduced heat loss on the first cold days.
It is also worth clarifying in advance how the work will disturb residents as little as possible: replacing the entrance gate, for example, may require a temporary solution to keep the building secure.
For every window project Merbo obtains comparable quotes with identical technical content from several contractors.