Back Priming Pine Siding

Where is the trapped moisture coming from.

Back priming pine siding.

The moisture is trapped behind the siding. This coupled with the fact that siding is often times not vented. Back priming natural wood siding helps control rotting mold build up cupping and movement in the wood ultimately giving your siding and your stain finish more longevity. We use it for back priming posts as well.

Back priming natural wood siding helps control rotting mold build up cupping and movement in the wood ultimately giving your siding and your stain finish more longevity. Back priming consists of applying a coat of primer to the reverse side and edges of boards before installing. Not only does back priming prevent rot it prevents bowing cupping. Apply a coat of stain blocking primer to the siding using a clean paintbrush and roller.

Use the paintbrush to brush the rolled primer into the wood. You can use bin shellac primer as an exterior primer as long as it s topcoated which all primers should be. Importance of back priming when installing wood siding. Back priming helps prevent paint from peeling by reducing the amount of water vapor that passes through the wood.

Apply the primer to the siding with the roller. The best primer for pine like paint primer comes in a variety of bases. Dries in 15 minutes and is the best moisture sealant bar none. It occurs either when heated or air conditioned air from the house radiates out and meets the cold or hot outside air.

It is great for sealing the endgrain of clapboards and trim as you are installing them. When back priming be sure to prime the ends of each piece after it has been cut to fit since end grain will absorb the most moisture. I would strongly suggest priming the front back edges and ends of your pine siding with an oil based exterior primer before installation.