Des Plaines houses mostly date to 1938-1996, with a lot of 1960s-70s stock, and that era of door hardware doesn't seal like newer doors do. Here's what actually causes the draught.
Not every draught is worth a service call. If you feel a thin line of air along one side of the door but the seal still looks pliable and makes contact with the floor, that's cosmetic for now - it's costing you a little heat, not threatening the door's operation. A seal that's merely worn at one corner, rather than cracked or pulled away from its retainer along most of its length, can usually wait until it's convenient rather than urgent. Same goes for a top seal that's slightly compressed but still flush. We'd rather tell you to wait and spend that money on something else than talk you into a service call for a gap that's purely about comfort. Where it stops being fine: if the gap lets in enough air to notice a temperature difference just inside the door, if you can see daylight along the bottom in more than one spot, or if the seal has shrunk enough that it's pulling loose from its channel. At that point you're not just losing heat - you're also inviting moisture and debris in, which is a different and faster-moving problem.
The actual mechanism is usually simple: the bottom seal (the astragal) rides in a u-channel retainer, and on doors from the 1960s-70s era common here, that retainer and the vinyl inside it were never designed to be replaced easily - they were designed to last the life of the door, which nobody expected to be fifty-plus years. Over that time the vinyl shrinks lengthwise before it visibly cracks, so the seal looks intact but no longer spans the full width of the door. That shrinkage is worse on original one-piece doors than on newer sectional panels, because the older design doesn't flex at the seams the way a sectional door does, so all the settling stress goes into the bottom seal and the slab gap rather than distributing across panel joints. Side weatherstrip has the same issue but it's less visible because it's vertical and doesn't collect light the way a bottom gap does. None of this is a design flaw - it's just thirty to sixty years of a cold-weather climate doing exactly what cold climates do to a consumable part. We can't make a forty-year-old seal act like a six-month-old one; at some point replacement is the only honest answer.
Describe the symptom - won’t open, loud bang, opener runs but the door won’t move.
A technician tests the door under power and by hand and finds what actually failed.
You get the fix that’s needed and what drives the cost - before any work starts.
The repair is done, the door is set true and tested, and the work area left clean.
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Learn moreStraight answers about garage door repair in Des Plaines. Still unsure? Ask us directly.
On houses from the 1960s-70s era common in Des Plaines, the bottom seal shrinks lengthwise over decades of cold-weather contraction before it ever visibly cracks. It looks fine but no longer spans the full width of the door, so cold air finds the gap at the corners first.
If the seal still looks pliable and touches the floor along most of its length, it can usually wait. It becomes worth a call once you see daylight in more than one spot, feel a real temperature drop near the door, or notice the seal pulling loose from its retainer channel.
Usually, yes, since on these older doors most of the air loss runs through the bottom seal and side weatherstrip rather than panel seams. If the slab itself has settled or cracked, though, a new seal narrows the gap but won't close it completely - that's a concrete issue, not a door issue.
Tell us what it’s doing and where you are in Des Plaines - we’ll take it from there.
