Patching Fiberboard Siding

Face nail the top.

Patching fiberboard siding.

When the new siding has been painted two coats of top quality acrylic latex over a primer the repair is hard to spot. Any product intended for interior use will crack and wash out in short order. The james hardie company makers of hardieplank recommends the use of a cement patch product made of an acrylic mortar compound for patching their siding products. Repair or patching fiber cement board siding dents chips cracks and other minor surface damage in james hardie siding and trim products can be filled with cementitious patching compound.

These areas include but not limited to penetrations flashings plank and trim connections and in some cases between plank joints. Use only completely acrylic paint and apply with rollers. This mixture is then pressed into a form and particleboard is the finished result. Use a cloth that is lightly moistened with warm water.

Make sure that the siding is completely dry from the washing and that the caulk and patches are dry too. Re applying caulking when it has begun to show signs of wear can help keep moisture from getting into the wall cavity. Remove any nails from the top piece of good siding. Depending on the size of your house you may need a ladder to reach the area of siding near the roof.

Cut the fiber cement siding to length wear approved dust protection. Blind nail the fiber cement siding in place starting with the bottom piece. Use a pry bar to remove the damaged siding. Allow the primer to dry.

Refer to manufacturer recommendations for products that are compatible with fiber cement. Use a putty. Lightly brush a water based or oil based paint primer onto the damaged surface. If your exterior siding has sustained damage you can patch it with filler but it has to be the right kind of filler.

Though it is a tough wearing product the surface of the siding can sometimes be damaged during installation by unusual wear or by impact. Years ago this material was flimsy and broke easily. Remove dust or small particles by vacuuming the surface. Anyway i don 39 t want to or need to re side the whole back of the house and i don 39 t really want to remove a 8 foot board to repair a 1 2 inch on the edge or even 2 inches on the edge or one soggy spot near an overdriven nail head.

The wood grain pattern on the fiber cement siding is often a perfect match with existing hardboard although it s not as good a match with real rough sawn wood. Particleboard is a low density form of fiberboard that is constructed from scraps of wood sawdust and paper products with a binder added. To remove and replace damaged siding.