Stucco & Exterior in Valley Village
Stucco and exterior repair on older Valley Village houses, including whether new stucco can go over the old coat. From Claremont.
Can new stucco simply go over the old coat? In Valley Village, that is a fair question before any contractor is called, and the honest answer depends on what the old coat is doing. If it is bonded, dry and flat, a skim can work. If it is hollow, stained or cracking, covering it only buries the problem.
Testing the old coat
Tapping across the wall maps hollow areas, and a moisture meter checks for dampness. A small cut shows how many layers are present and whether the lath behind them is sound. Bonded, flat stucco with no moisture can accept a new finish after cleaning and preparation. Anything loose, wet or cracked has to be cut back to solid material first, and the cause of the damage is dealt with before new plaster covers it. The cut openings show the layers in section and make the plan easy to follow before any wall is touched.
Choosing a path
Where the old coat passes, a new finish coat can renew color and texture across the whole wall. Where it fails, the failed areas are rebuilt and the wall is then recoated so the face is even. Added weight and thickness are considered, since a wall can only take so many layers. The decision is made wall by wall, with each side of the house judged on its own condition. Thin skim coats can crack if the base moves, so only stable walls are candidates for the lighter approach.
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Stucco & Exterior in Valley Village: common questions
Yes, with test patches. A sample is applied to the wall, cured and compared in different light. The texture is copied by hand, and the color is mixed to a chip of the old finish. If the original has a distinctive hand look, recoating the full face can give the most even result.
Plaster shrinks as it cures, framing and foundations move, and water gets behind failed flashing. Cracks from shrinkage are fine and shallow, while diagonal cracks from opening corners reflect movement. Stained or hollow cracks mean moisture. Because a covering coat would hide the cause, the cause is found and fixed first.
Keep sound boards and repair them with patches and paint. Rotted or split boards get replaced with ones milled to the old profile and reveal, and all faces and cut ends are primed. If rot reaches the sheathing, that gets repaired too. Siding close to the ground or sprinklers fails early, so that contact is corrected as well.
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