09:18AM | 07/25/04
Member Since: 07/24/04
1 lifetime posts
We installed a new hardwood floor in the entire first level of our 32 year old house. Every board cupped. We can't find any measurable amount of moisture with a meter except in two small areas in the crawl space it's 14%. Not over 6% anywhere else. We used red rosin paper (builder paper)over the subfloor before laying the hardwood. Someone suggested it wasn't acceptable. What is the acceptable cover over the subfloor before the hardwood is laid? Any advise on why the whole 2200 square feet would cup when we don't have a major moisture problem?


05:16PM | 07/25/04
Member Since: 11/06/02
1280 lifetime posts
it is obvious from the cupping that you do have a sort of moisture problem, but ar ejust not reading it right. Some info is missin in the tale.

Any time that you have cupping, especially this consistant, it means that the back of the floorboards has more moisture than the front.

So either the moisture has come up from below, migrating into the flooring and expanding the back sides of it while the topside stayed the same

Or the flooring was laid too soon befoire it had stabilized to jobsite conditions, was more damp than itr should have been, and the top shrunk while the underside remained the same.

or a combination of the two.

Did you use the moisture meeter to study the flooring pieces on both sides and the subfloor before you installed and finished it. Thjey should not have been moire than 1 or 1-1/2° apart in readings.

Did you sticker the wood with good air circulation for ten to twenty days before installing it

Did you change anything else since the installation, like adding an air conditioner, starting to use one, or a dehumidifier since the installation. AC acts as a dehumidifier and will dry the air, shrinking the surface.

Excellence is its own reward!


02:50PM | 09/04/04
Member Since: 09/01/04
4 lifetime posts

I read the other reply to your question and it is all good. Let me add this. If it was a solid wood product and glued down possibly used wroug glue. Engineered plank

will cup sometimes with wrong glue combined with climatizing factor and sometimes temperature. Hope this helps.

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 ... The Audubon Society inspired wallpaper in this Adirondack-styled mudroom will get you in the outdoor mood. Grab your coat ... 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