04:43PM | 01/03/13
Have the exact same problem. Our house is a 100-year-old home with a crawlspace. Plumbers, pest controls, checking of the crawlspace screening, all have been to no avail.

It comes usually every 1 to 3 months, but it may appear as close as every few days.

Your remarkable comparison to a ghost is interesting. That is what we call it. It is as if some invisible old person, incontinent, has come into a room and removed her depends. It is clearly distinct, different from the smell of the dead animal, Which should be called a putrid odor. It is also distinctly different from dog feces.

The "bloom" character of it is also exactly as you describe. It is simply there within a matter of a moment, and seems to disappear somewhat more slowly, completely gone within the half hour. With these simple venting of the room, opening windows and using the fans, the odor can be completely removed in about 20 minutes.

The only Hint of an answer is, after an extensive Internet search is that there is a chemical process involving water or humidity exposure to a mortar or plaster. The result is urea salts are produced. I am told that urea salts will be the actual source of the urine odor. The only problem is I cannot find a source of Water contact with either mortar on the perimeter foundation of this old house, and certainly not with the original horsehair plaster walls.

I have not checked Venting pipes from the sewage system through the ceiling. I should have all of the sewage traps filled with water. I have exhaust fans working in the crawlspace to keep it ventilated.

I hope my experience will help you find a solution. I very much hope to hear what it is. Thank you.


11:08AM | 01/09/13
Member Since: 01/09/13
1 lifetime posts
Cat Urine, consists of three, chemical parts the urea, which makes the urine sticky and allows the other two parts to create odors. Urochrome gives the urine its ugly yellow color that stains carpets, furniture the walls. The third part is made up of Uric Acid; the uric acid in the urine consists of salts and crystals that give off the extremely pungent odor that vaporizes and turns into an invisible gas. Spray’s and candles are just short term fixes until the next accident. A permanent solution, a product called AirReNu, which only requires one application, works night and day 24/7/365, removing all odors and improves indoor air quality.
Click to reply button
Inspiration banner


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button

To test the boundaries of small-footprint living, interior designer Jessica Helgerson moved her family to a 540-square-foo... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... This spacious mudroom just off from the laundry room has plenty of room for tucking towels away and drying off after a dip... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR tiles are an affordable way to customize a carpeted floor covering for any space. Make anything from runners to wall-... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... Dark wood shelving and a matching upholstered bench keep this closet sleek and refined. The large window brightens the sub...
Follow banner a
Newsletter icon Flipboard glossy Facebook Twitter Pinterest Youtube Rss icon