Drafty Windows in Tulsa, OK
Is your window leaking heat? A 10-minute test before the first freeze
- Windows
- Energy
You can find drafty windows in Tulsa, OK, in about ten minutes with your hand, an incense stick and a sheet of paper. If the smoke gets pushed sideways or the paper slides out of a closed sash, air is getting past the window, and new weatherstripping or caulk often fixes it for little money. Fog between the panes, a soft frame or a sash that will not close square are the signs that point to a replacement instead.
Do the test before the furnace runs all day. The National Weather Service office in Tulsa puts the city’s average first fall freeze on November 3 and the first hard freeze on November 14, from records that go back to 1906. A breezy day works better than a still one, because moving air pushes through gaps you would never feel on a calm afternoon.
The 10-minute window draft test
Close and lock every window first. On a double-hung window the lock does more than keep people out: it pulls the two sashes together at the middle rail, so a sash that is not locked can leak where a locked one does not. Then go room by room with a notepad.
- Hand: run the back of a slightly damp hand slowly around the sash edges, the middle rail, the corners and the trim. A cool stream in one spot is a leak.
- Smoke: hold a lit incense stick next to the seams and sash. ENERGY STAR’s guide to sealing window and door trim says that if the smoke is pushed one way or another, you most likely have a leak.
- Paper: close the window on a sheet of paper. If it moves back and forth easily, the same guide says the window could be tighter, often with thicker weatherstripping.
- Look: check for daylight at the edges, dust or bugs on the sill, and peeling paint around the frame.
- Glass: look for fog or droplets between the two panes that you cannot wipe off from either side.
- Write it down: the room, the window, and what each test found.
Incense smoulders rather than flames, but it still burns. Tie back curtains and blinds, hold a saucer under it for the ash, keep children and pets clear, and put it out in water when you finish.
Work slowly along the corners, the sill and the rail where the two sashes meet.
Six places to check on a double-hung window, and which test finds each one.
Windows leaking heat, not just air
A window loses heat two ways, and the draft test only finds one of them. Air leaking past the sash or around the frame moves smoke and paper. Heat passing through the glass and frame does not: the smoke rises straight, yet the pane is cold and so is the air beside it. Weatherstripping and caulk fix the first kind. They do nothing for the second.
The second kind is the U-factor printed on a window’s label, and lower is better. The glass changes it more than most people expect. On the Gentek Signature Elite double-hung, our main window line, Gentek’s own brochure lists a whole-window U-factor of 0.46 with clear double-pane glass and 0.29 with its BarrierXP low-E package, in the same frame. So if a window passes the paper and smoke tests but the room still feels cold beside it, the glass is the problem, not a gap. Our guide to energy-efficient windows shows how to read that label.
Drafty window: fix or replace?
Match what you found to the option that fixes it. The first three are often a homeowner’s job, though ENERGY STAR calls sealing behind trim a moderate to difficult DIY project.
| Option | What it fixes | Enough when | Not enough when |
|---|---|---|---|
| Lock the sash | A sash not pulled tight at the middle rail | The leak stops once it is locked | The lock will not reach, or the sash rattles while locked |
| Thicker weatherstripping | Air at the sash edges; paper slides out | The frame and sash are sound and square | The sash is warped, loose or rotted |
| Caulk, or foam behind the trim | Air where the frame meets the wall | Caulk for gaps of a quarter inch or less, non-expanding foam for wider ones | The frame itself is soft or moving |
| A warranty claim | Fog between the panes from a failed seal | The window is still covered for seal failure | Coverage has run out and several units have fogged |
| Storm window or lined curtains | Cold glass with no air moving | You want a step short of replacing single-pane windows | You want the room comfortable all year |
| Replacement window | Rot, failed frames, single-pane glass, several failures | Several windows fail on frame or glass | One window has one worn strip |
Key takeaway: If the paper test is the only one a window fails and its frame is solid, you need weatherstripping, not a new window. Replace the windows that fail on glass or frame, not the whole house by default.
Fog between the panes is not a draft, and no bead of caulk reaches it: moisture has got inside the sealed glass unit. ENERGY STAR counts it among the four signs a window needs replacing, which we list on our window guides page. Check the warranty before you buy, though. Gentek’s lifetime limited warranty covers seal failure for the original owner for as long as they own and live in the home.
From each test result to the fix that matches it.
Old windows and lead paint
Tulsa’s oldest houses sit close to downtown. Census figures put the median home in the 74104 and 74120 ZIP areas at 1943, against 1989 and 1990 in South Tulsa’s 74133 and 74137 (U.S. Census Bureau, ACS 2020-2024). That gap changes the job.
In a house built before 1978, the paint on the sash and trim can contain lead, and scraping old caulk or prying off trim makes dust. The ENERGY STAR trim guide says a pre-1978 home may need a professional to handle lead paint chips safely. Both owners are EPA lead-safe certified renovators, and our guide to lead-safe window replacement explains what that work looks like. In South Tulsa the question is age instead: original windows in a house from 1989 are now more than 35 years old.
Peeling paint on an old wood window. In a house built before 1978, treat it as lead until a test says otherwise.
Windows to lower energy bills
New windows lower energy bills most when the old ones lose heat through the glass and frame, not just at a worn strip: single-pane glass, fogged units around the house, frames that no longer close square. A house with sound windows and a few leaks gets more back from a tube of caulk and an afternoon than from a new set of windows.
When replacement is the answer, this is how it works with us. The estimate is free around Tulsa and happens at your house, with brochures and samples in hand rather than a showroom visit. We check each window you are worried about and guide you to the right option, so you do not pay for more than the house needs. Our own crew installs, with no subcontractors, and the owners supervise and help with materials. Our main line is Gentek Signature Elite vinyl, and we also install the Andersen 100 Series. Every job carries our 1-year workmanship warranty, and the manufacturer’s warranty is passed on to you and explained.
Run the test this week. If it points to new windows, see our replacement windows page, read how Tulsa houses differ by era, or book a free estimate and call (918) 619-2010.
