Primer For Cedar Shake Siding

Some sections of old unpainted shingles and siding may look darker than others.

Primer for cedar shake siding.

At one time the recommended base coat for cedar siding shingles was an alkyd based primer. And to slightly tint your siding with color pigmentation uv5 penetrating wood finish is a sound choice. Set your store to see local. Cedar shakes are cedar shingles that naturally weather and are resistant to decay.

Do not use water borne primers over exposed cedar siding. Painting cedar however calls for some preparation. Test results from the forest products testing lab run by the usda for the forest service show that after 12 weeks of exposure to sunlight cedar siding has lost half of its ability to hold a film forming coating system like primer and paint. What that means is that you can put primer on the cedar siding but brown stains will come through.

Oil stain blocking primer would work best i know i have had problems in the past with cedar shakes bleeding threw the paint before especially with white. The flood pro series by ppg paints comes in a wide range of exterior stains that are ideal for western red cedar products. The only way to block the tannins in the cedar siding is to use an oil primer. To add a rich long lasting opaque color there s ppg s 100 acrylic stain which protects against sun and water damage.

While that may still be a good choice in many locales those coatings have some drawbacks in regions with extreme winter to summer temperature shifts because an alkyd primer can crack when it is unable to expand and contract with the wood. You ll have to remove the mildew and prime the wood with a stain blocking primer. The paint will begin to peel and the shingles may become stained and they will need to be repainted. Like most wooden shingles however especially when painted they require care and maintenance over the course of time.

T1 11 siding cedar siding white wood siding shake wood siding 250 mdf 1x10 bullnose. Water borne primers cannot block the tannins in the cedar. This discoloration is most likely caused by a combination of excessive tannins leeching from the wood and mildew growth. Primer shouldn t be necessary before painting vinyl siding unless the surface is pitted or the original color has faded so much that the siding panels have become porous in that case be sure.

Cape cod gray eastern white cedar shingle siding 25 sq.