Wednesday, August 20, 2014

Here are the tricks to ridding your walls of mold

From page A6 | October 06, 2013 |

By Dwight Barnett

Q: I have had mold buildup on the walls of my master bedroom, and I have been managing it by washing it down every year or so. But it comes back even though I keep it ventilated. It is the only room in the house with this problem. It tends to be damp and the other rooms are dry. The only difference is that the bedroom is a step down and lower than the rest of the house. There is a crawlspace, and during the raining season it will get wet. But there’s no standing water and it tends to dry up as summer comes and goes. I was told to paint the walls with mold-resistant paint, but I read that this would not solve my problem. Please advise.

A: Mold thrives in dark, damp and warm environments such as a closet or where furniture is placed tightly against an outside wall. Mold needs three things to survive and grow: water, warmth and a food source. Your drywall is an ideal food source because the paper on both sides of the drywall contains cellulose, the basis of all paper.

If you see mold on the room side of the drywall, there is a 90 percent chance there is a larger area of growth on the backside of the drywall in the dark, often-damp recesses of the home’s structure.

By cleaning the mold, you are adding water to the already affected area, thereby aiding in the growth and expansion of the mold problem. I often hear stories of homeowners using household bleach to clean mold, but bleach only adds to the problem.

According to the Clorox Company, “Regular Clorox bleach contains water, sodium hypochlorite, sodium chloride, sodium carbonate, sodium hydroxide and sodium polyacrylate, in descending order of concentration.” Therefore, do not use bleach to clean away mold.

Because the bedroom floor is lower than the other rooms in the home, the floors are closer to the damp soils of the crawlspace and I would assume the room is on the northwest side of the home. The northwest is the coldest side of the home, where condensation forms in colder months. As the soils under the floors dry, they release warm moisture-laden air that finds its way to the wall cavities of the bedroom.

The moisture-laden air condensates and feeds the mold on both sides of the wall.

My solution would be to first locate the electrical wiring inside the walls so that you do not accidentally cut the wires.

Next, use a drywall saw to remove the affected drywall, discarding it outside of the home. Remove damp or moist wall insulation and any vapor-barrier materials you encounter. Allow the wall cavity to dry before replacing the insulation and drywall.

Wearing a painter’s mask and rubber gloves, go into the crawlspace to inspect the floor joists and floor decking for mold. Use a wire brush to remove any mold found on the wood surfaces.

Severe cases of mold growth in a crawlspace will require a treatment performed by a mold-remediation contractor. Add a 6-mil-thick plastic ground-cover vapor barrier over the entire crawlspace floor to restrict moisture migration. If water in the crawlspace is an ongoing problem, a foundation drainage system needs to be installed.

What I am advising you to do is to eliminate the water and moisture source that feeds the mold. In more severe cases of mold growth, a dehumidifier is temporarily installed in the crawlspace to alleviate the humidity problems and allow the wood-floor system to dry.

The mold will always be there in the wood, but when dry, it goes dormant. Wood is considered dry when it contains less than 19 percent moisture by content.



Scripps Howard News Service



Summer jobs aren’t always in the bag

By Spencer Ault | From Page: A1 | Gallery

Davis Arts Center gets a new look, thanks to Brooks

By Enterprise staff | From Page: A1 | Gallery

More details emerge in Woodland officer shootings

By Lauren Keene | From Page: A1 | Gallery

Report details the face of hunger in Yolo County

By Anne Ternus-Bellamy | From Page: A1 | Gallery

Bob Dunning: Taking on a Specktacular challenge

By Bob Dunning | From Page: A2 | Gallery

For the record

By Enterprise staff | From Page: A2

Students can practice safe bike routes to junior highs

By Special to The Enterprise | From Page: A3

‘Monsters University’ to be screened in Central Park

By Enterprise staff | From Page: A3

California regulators approve PG&E rate hike

By The Associated Press | From Page: B3

America’s ‘it’ school? Look west, Harvard

By New York Times News Service | From Page: B3

School board preps for new academic year

By Jeff Hudson | From Page: A3

The big moveout, on ‘Davisville’

By Enterprise staff | From Page: A3

Sunder campaign will be at Farmers Market

By Enterprise staff | From Page: A3

Classic car show slated in Woodland

By Enterprise staff | From Page: A3

Public opinion sought about Nishi Gateway

By Lily Holmes | From Page: A4

Davis Art Garage honored; bench dedication set

By Special to The Enterprise | From Page: A8 | Gallery

Woodland historical award winners announced

By Enterprise staff | From Page: A8



Can’t understand this change

By Creators Syndicate | From Page: B5

Delta-friendly water bond is a win for all of California

By Special to The Enterprise | From Page: A6

Bravo! The road diet works

By Rich Rifkin | From Page: A6

Support water bond in November

By Letters to the Editor | From Page: A6

Relay for Life team says thanks

By Letters to the Editor | From Page: A6

Tom Meyer cartoon

By Debbie Davis | From Page: A6



Hard hoops schedule features defending national champs at UCD

By Bruce Gallaudet | From Page: B1 | Gallery

Crisp’s big hit helps A’s

By The Associated Press | From Page: B1 | Gallery

Aggie QB is back to pass … Touchdown, Tina! Tina?

By Bruce Gallaudet | From Page: B1 | Gallery

Sacramento scores early to snap skid

By Enterprise staff | From Page: B8

Unplayable? Cubs, rain hand Giants a loss

By The Associated Press | From Page: B8

UCD roundup: Aggie gymnasts are awesome at academics

By Enterprise staff | From Page: B8 | Gallery



Food that travels well for cooking out

By Julie Cross | From Page: A5 | Gallery



Visit Crawfish and Catfish Festival in Woodland

By Enterprise staff | From Page: A7

Artists invited to paint at Yolo Bypass Wildlife Area

By Special to The Enterprise | From Page: A7 | Gallery

Goldberg, Milstein to play at Village Homes

By Enterprise staff | From Page: A7 | Gallery

The voice on the CD comes alive at Music Together concert

By Enterprise staff | From Page: A7

Crowd funding campaign offers support for Art Theater of Davis

By Special to The Enterprise | From Page: A7





Railroad museum will host Aberbach memorial

By Enterprise staff | From Page: A4



Comics: Wednesday, August 20, 2014

By Creator | From Page: B6