Exterior doors are one of the places in a home where heat most often 'disappears' — yet we pay less attention to them than windows. If you feel a draft or the floor is cold in winter, it may be time to reconsider your choice.
Exterior doors are usually made of metal, PVC or composite materials with an insulation core. It is important that the door construction includes a high-quality insulation layer inside, a durable exterior finish that withstands weather conditions, and a strong frame that does not deform over time.
Even good doors will not work properly without the right sealing. Check whether the door has multiple sealing contours, whether the threshold is insulated — heat is often lost precisely through the threshold — and whether the door closes tightly around the entire perimeter, not just on one side.
Just as with windows — even the best doors will not work properly if they are not installed correctly. Poor installation means drafts around the frame, doors that start to move or do not close tightly over time, and moisture that eventually damages the door structure.
Exterior doors are not just a heat issue — they are also the first security barrier of the home. When choosing doors, it is worth paying attention to the lock class and the door's resistance to forced entry.
A common mistake is doors that do not exactly match the opening size. This creates the need for additional materials during installation, which can worsen thermal insulation if the work is not carried out precisely.
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