Archive for American Society of Home Inspectors

Caring for Wood Siding – A Reprint from Houselogic (August 2009)

How many of us have wood siding and really don’t know the best way to clean it and keep it looking fresh.  Unlike vinyl siding, you can’t turn on the power wash spray or you will have what many have experienced – places where the paint has come off.  Perhaps staining is the answer?  Here is some great information from www.HouseLogic.com

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Wood siding is one of the most beautiful of all types of siding—and one of  the most expensive. If you’d like to avoid repairs that could cost thousands of  dollars, and you’d like to keep your clapboard, shingles, or board-and-batten  lasting for decades, regular upkeep and maintenance is critical.

Finish, protect wood siding

Wood must be properly finished with a paint, stain, or clear sealer. Left  unprotected, it’s susceptible to rot and decay caused by moisture. Of special  concern is the fact that wood expands and contracts with normal changes in  humidity and temperature. These fluctuations may cause paint finishes to chip  and crack, and over time puts stress on caulked seams around windows, doors, and  at corners. If the caulk separates and fails to keep out moisture, wood rot may  develop. Even species of wood that have a natural resistance to rot, such as  redwood, cypress, and cedar, may decay if not properly protected from the  elements.

Paint comes in unlimited colors and can be changed at any time. A house with  wood siding must be repainted at least every five years, or as soon as the paint  finish begins to deteriorate. A DIY paint job requires about 60 hours of labor.  A professional crew will paint a two-story, 2,300 sq. ft. house for  $3,000-$5,000.

Stain is a good choice for wood because it allows the beauty of the grain to  show through. Stain penetrates wood fibers and helps seal them against moisture;  it’s also resistant to the cracking and chipping that affects paint. Because  stain is a penetrating sealer—not a coating, like paint—it’s difficult to change  the color of previously stained wood. Staining a house is less labor-intensive  than painting because prep work is minimal. Expect to pay $2,000-$4,000 for a  pro crew to stain a two-story, 2,300-sq. ft. house. Using a rented paint  sprayer, a two-person DIY team can re-stain a two-story house in 4-5 days for  about $500, including the stain.

Clear sealers prevent moisture damage and allow wood to retain its natural  color, but they must be reapplied at least every two years. Clear sealers are  formulated to help slow the process that allows ultraviolet light to turn wood  silvery gray. However, all natural wood, regardless of species, eventually turns  gray when exposed to years of sunlight. Using a rented paint sprayer, a  two-person DIY team can refinish a two-story, 2,300 sq. ft. house in a 3-day  weekend for about $500, including the finish.

Clean stains on wood siding

Dirt is the most common cause of discoloration on wood siding. Clean annually  using warm, soapy water and a soft-bristled brush. Divide your house into  20-foot sections, clean each section from top to bottom and rinse before moving  on.

Mildew appears as black spotty stains. Clean the area with a solution of one  part bleach to four parts water. Wear eye protection and protect plants from  splashes. Rinse thoroughly with clean water.

Rust stains often appear as dark black splotches and vertical streaks.  They’re usually caused by a metal fastener, such as a nail or screw, that wasn’t  galvanized. Contact with moisture causes the fastener to oxidize, leaving  streaks. To remove the stain, dissolve 4 oz. oxalic acid (available at hardware  stores and home improvement centers) in 1 cup warm water.

Wear eye protection and acid-proof gloves; avoid splashing the mixture onto  adjacent surfaces. Apply the mixture to the stain and gently scrub with a soft  bristle brush. Rinse thoroughly with water. Refinish the spot if necessary.  Problem nails must be replaced with a galvanized or stainless steel  fasteners.

Restore the color of natural wood siding

Siding that has discolored with age can be restored to its original color by  applying a wood cleaner or brightener. These products often are intended for use  on wood decks, but they work well on natural wood siding. They’re available at  hardware stores and home improvement centers. Follow the manufacturer’s  instructions.

Replace wood siding

Replace wood siding that show signs of damage. The most common damage comes  from accidentally hitting the siding with sticks and stones thrown from a lawn  mower, or from objects, like baseballs. Occasionally, wood siding may crack due  to changes in atmospheric moisture. Repairs to wood siding require the expertise  to remove the damaged siding while leaving surrounding siding intact. Unless you  have the skills, hire a professional carpenter or siding contractor. Expect to  pay $200-$300 to replace one or two damaged siding panels.

Prevent damage to wood siding

A house with wood siding is most vulnerable to water infiltration where  siding butts against windows, doors, and corner moldings, says Frank Lesh, a  professional house inspector in Chicago and past president of the American Society of Home  Inspectors. Look for caulk that has cracked due to age, or has pulled away  from adjacent surfaces, leaving gaps. Reapply a color-matched exterior caulk  during dry days with temperatures in excess of 65 degrees F.

Lesh also stresses that no bush, tree branches, or shrubbery be allowed to  touch the house siding. Foliage conducts moisture that can find its way into  cracks and tiny openings in siding. “You should have enough room to comfortably  walk between your house and any plant materials,” he says.

Read more:  http://www.houselogic.com/home-advice/roofing-gutters-siding/wood-siding-care-and-maintenance/#ixzz1sfaWuzWi

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