Caulking
MATERIAL - Use a gun grade polyurethane sealant like VULKEM® 116.
COLOR - Tan or buff works best with most shades of cedar.
All caulking is done after installation, except the bead between the ends of siding at the butt joints (see illustration #A on this page). Use caulking around joints where log ends meet the siding and where siding joins the trim pieces. Also caulk any cracks or joints where moisture may accumulate. You do not need to seal the horizontal seams of the siding.
SPECIAL TIPS FOR EASY APPLICATION -
Cut the tip of the applicator tube at an angle creating a bevel. Apply the caulking at an angle to the surface, so the bevel is nearly level to that surface. Move the gun in a steady fashion to create an even distribution of caulking. The most attractive “bead” is smooth and without wrinkles. Start caulking the least visible portions of the house first.
CAUTION
The wood should be dry for caulking material to create an effective moisture seal. If the wood is damp from rain, wait for dry weather to give the wood a chance to dry for more effective adhesion. Also, never wipe off excess caulking with a rag. Wait for it to dry and then trim the excess with a utility knife.
WHERE TO CAULK
#1. Entirely around solid log ends where water may puddle or be forced by the wind.
#2. Butt joints where the ends of siding meet each other or meet the trim. Caulking between the ends of butt joints prevents moisture accumulation.
Insulation Tips
Nothing makes people feel “cozier than the look of logs.” The weather lap feature is designed to keep water out and the very bulk of Modulog siding will add significantly to the “R” factor (more than a 1.5 R increase).
Many times Modulog siding can be applied directly over the top of existing siding. This will obviously add to the warmth and comfort of your house. In those situations where the old siding is removed, you may wish to consider an additional insulation factor.
A popular solution is the use of rigid insulation panels (different thicknesses available), which provide a continuous protective underlayment that is easy to apply and can cover a whole house for a minimal cost. Rigid insulation paneling has the advantage of being able to smooth and level old walls. Most products are perforated to allow potentially damaging water vapor to escape.
