Search Results for: vapor barrier

Hands marking a wall using a stud finder and pencil

Kickout Flashing Retrofits Behind Stucco: Safe Cutbacks and Correct Lap Order

Introduction Kickout flashing is the metal flange that directs water away from the stucco at a wall opening, helping water not to get behind the siding. This article covers safe cutbacks and how to keep the lap order correct when retrofitting behind existing stucco. If in doubt, check the product label and local rules for […]

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Freshly poured smooth wet concrete slab inside a building

Concrete Slab Curling on Small Pours: How to Measure It and Prevent the Next One

Introduction Curling is when a concrete slab lifts in the middle as it cures. Causes include moisture differences, improper edge drying, and uneven shrinkage during curing. On small pours, wind and heat shifts can worsen the effect. To measure curling, check for a ridge or gap at the edges by placing a straightedge across the

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Close-up of cracked concrete surface with fine fissure

Concrete Moisture Testing for Coatings: Plastic Sheet vs RH Probes vs Real-World Clues

Introduction Concrete moisture testing for coatings is how you check if a slab is dry enough for coatings using plastic sheet tests, RH probes, or real-world clues. Plastic sheet tests give a quick yes/no read, RH probes measure in-the-mix or at the surface over time, and real-world clues come from how coatings behave in practice.

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Hands wearing gloves applying plaster with a trowel on wall

Lime Plaster Over Foam Indoors: Mechanical Keys, Mesh, and Fire-Safety Notes

Introduction Lime plaster over foam indoors is applying a breathable lime-based coating on foam insulation or foam boards inside a building. It needs proper keys, mesh, and surface prep so the plaster grips the foam. Work slowly, check that the foam is compatible with lime, and follow local rules. Use mechanical keys and mesh to

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Close-up of white stucco wall texture

Stucco Wicking from Concrete: Base Details and Capillary Break Fixes

Introduction Stucco wicking from concrete happens when moisture travels through the concrete and into the stucco layer. This article covers how to prep the base and prevent capillary pull that brings dampness into the finish. Think of base details as the first line of defense: clean, dry, and properly framed to keep water away. Capillary

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Box fan on concrete floor with dark moisture stains on wall

Concrete Block Moisture Problems: Capillary Rise, Sealers, and Interior Coatings That Make Sense

Introduction Moisture problems in concrete blocks happen when water wicks through the wall, showing up as damp patches and mineral blooms. This is commonly caused by capillary rise and can occur even when the surface seems dry. To deal with it, you need to identify where the moisture is coming from and how the wall

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Close-up of concrete beam to column connection with visible joint

Choosing Caulk for Concrete Block Joints: Polyurethane vs Hybrid vs Silicone (and why it matters)

Introduction Caulk for concrete block joints is a flexible sealant used to close gaps between concrete blocks to keep out water and air. Choosing the right sealant starts with the joint type and weather exposure, then applying it with the right tools. Keep in mind it should bond to masonry, cure properly, and be compatible

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Exposed brick wall partly covered with gray stucco render

Stucco-to-Brick Transitions: Movement Joints and Water Breaks That Don’t Crack

Introduction A movement joint at a stucco-to-brick transition is a deliberate gap that lets the siding materials expand and contract without cracking. Its job is to separate the two substrates so stresses don’t transfer and crack the finish. This article shows practical, hands-on steps for placing joints and installing water breaks so the transition stays

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Wet concrete being poured over steel rebar grid

Rust “Ghosting” in Concrete: Preventing Stains from Chairs, Ties, and Rebar

Introduction Rust ghosting is stains left in cured concrete by corroded metal in contact with the mix. It happens when moisture and metal react, causing rust to bleed into the surface during curing. Common culprits are chairs, ties, and rebar that sit in the pour. Prevent it by choosing non‑corroding or protected hardware and by

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Gloved hands applying plaster on wall with trowel

Gypsum Over Lime Plaster: Compatibility Traps and Smart Primers

Introduction Gypsum over lime plaster is when you apply gypsum-based finish over a lime plaster substrate, which calls for checking compatibility first. Lime and gypsum cure differently, so mismatches can cause peeling or cracking, and a proper primer or bond coat helps. Plan your prep and follow manufacturer or product guidance for the exact steps.

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