siding

Back

real cedar siding
introduction

Back

siding home
why real cedar?
western red cedar characteristics
sustainability
design & spec

Back

siding profiles
bevel siding
board and batten siding
tongue & groove siding
lap or channel siding
trim boards
shingle panels
building

Back

preparation for installation
pre-building tips
dupont™ tyvek® drainwrap™
installation
general installation
installing profiles
bevel
board & batten
tongue & groove
lap or channel
trim boards
shingle panels
finishing

Back

how to finish
types of finishes
care & maintenance
restoration
decking

Back

real cedar decking
introduction

Back

decking home
why real cedar?
western red cedar characteristics
sustainability
planning

Back

decking calculator
deck projects
roof deck
raised deck
ground level deck
uphill sloping lot deck
building

Back

fastener recommendations
stair & railing installation
finishing

Back

finishing tips
restoration
care & maintenance
outdoor

Back

real cedar outdoor
introduction

Back

outdoor home
why real cedar?
western red cedar characteristics
sustainability
design & spec

Back

real cedar free diy project plans
design tips
building

Back

project preparation
outdoor fasteners
fence construction
fence specifications
prebuilt fence panels
finishing

Back

finishing techniques
finishing tips
restoration tips
care & maintenance
indoor

Back

western red cedar indoor
introduction

Back

indoor home
why real cedar?
western red cedar characteristics
sustainability
planning

Back

cedar saunas
traditional saunas
infrared cedar sauna
cedar indoor design tips
building products

Back

building preparation
indoor t&g paneling
doors & windows
blinds & shutters
finishing

Back

finishing tips
care & maintenance
timbers

Back

real cedar timbers
introduction

Back

timbers home
why real cedar?
western red cedar characteristics
sustainability
planning

Back

grades and specifications
building

Back

preparation
installation
maintenance

Back

finishing
restoring western red cedar timbers
care & maintenance
gallery
for architects and builders
resources

United Kingdom

Western Red Cedar Outdoor Project Care & Maintenance

Outdoor Care & Maintenance

The surfaces of finished Western Red Cedar decks, siding and trim boards exposed outdoors inevitably become dirty and can also be discolored by mildew, algae and moss. These natural elements slowly erode the finishes and as a result, all finishes applied to cedar require regular cleaning and maintenance to perform. The degree of maintenance depends on local climatic conditions, the type of finish and end use (deck or siding).

Discoloration of finishes on Western Red Cedar

Western Red Cedar enjoys a well-deserved reputation as a wood that takes and holds a range of finishes for extended periods. Nevertheless, the usual lifespan of a finish will be shortened by degradation and discoloration. The causes of discoloration often require remedial treatment.

Dirt

Dirt is the most benign cause of discoloration. A periodic cleaning with a mild, non-phosphate detergent solution will usually restore the surface finish.

Mildew

Mildew is a common form of discoloration of paints and stains caused by staining fungi. Re-staining does not solve a mildew problem. When it is time to refinish, clean off the mildew with a mild bleach solution (oxygen bleach is preferred) or commercial mildew-remover. After the wood has been thoroughly rinsed and allowed to dry, refinish with a coating that contains an effective mildewcide.

Tip: A simple test for the presence of mildew on the coating can be made by applying a drop or two of a fresh solution of liquid household bleach (containing 5 percent sodium hypochlorite) to the stained area. The dark color of mildew will usually bleach out in 15 to 30 seconds. Discoloration that does not bleach is due to other factors and requires further investigation.

Extractive Bleeding

LA00393004Discoloration due to extractive bleeding is usually caused by moisture. To stop stains caused by extractive bleeding, the moisture source must be eliminated. Mild staining is often washed away by rain over a period of weeks. In sheltered areas of a building where the stain persists, it may become darker with age and more difficult to remove. If washing with a mild detergent solution does not work, applying a mild oxalic acid solution has been proven to be effective in removing water, tannin or iron stains. Commercial cleaners are also available. If the stain remains, prime the area with an alkyd primer and top coat with a latex coating.

Iron Stains

Iron stains may appear in two forms: the reddish brown discoloration caused by rust, and blue-black discoloration caused by the reaction of iron from nails and other metal objects with extractives from the Western Red Cedar. To prevent these stains, use only hot-dipped galvanized, aluminum or stainless steel nails when fastening cedar. To clean areas affected by iron stains, use a commercial cleaner. In situations where the stain has penetrated the wood surface, light sanding or brushing may be required.

Water Stains

These often occur in combination with extractive bleeding and mildew growth. These stains can be difficult to remove. Scrubbing the wood with a dilute oxalic acid solution is sometimes effective.

Caution: Handle oxalic acid solution with care as it can be harmful – carefully follow the instructions.

Chalking

Chalking, the release of pigment and degraded resin particles, results from weathering of the paint’s surface. It is a degradation of the paint film, not the cedar. Chalking is a common cause of fading in tinted or colored paints.

Peeling, Blistering or Flaking

Paint failure such as peeling, blistering or flaking is often associated with moisture build-up behind the paint and poor adhesion of the paint film to the underlying wood. This problem is exacerbated if paint is applied to weathered wood.

Regular Maintenance Extends the Life of Both Finish and Decking

A deck that dries after wetting will last longer than one that stays damp. Ongoing maintenance practices for cedar decks include: allowing proper water drainage; keeping the surface free of dirt, leaves, tree needles and other debris; moving planters, benches and other deck accessories from time to time to permit the deck beneath them to dry thoroughly and ensuring that the ventilation under the deck is not inhibited.

Western Red Cedar Facts
Members
Gallery