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STRUCTURAL INSPECTIONS & DEFECTS
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AGE of a BUILDING - how to determine
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BEST CONSTRUCTION PRACTICES GUIDE
BRICK FOUNDATIONS & WALLS
BRICK STRUCTURAL WALL Loose Bulged
BRICK WALL THERMAL EXPANSION CRACKS
BRICK VENEER WALL Loose, Bulged
BRICK WALL DRAINAGE WEEP HOLES
BUCKLED FOUNDATIONS due to INSULATION?
BUILDING DAMAGE ASSESSMENT & REPAIR
BUILDING SAFETY HAZARDS GUIDE
CHIMNEY INSPECTION DIAGNOSIS REPAIR
COLD POUR JOINTS, CONCRETE
COLUMNS & POSTS, DEFECTS
CONCRETE FOUNDATIONS, PRE-CAST
CONNECTORS, FASTENERS, TIES
Cracks, Checking or Splitting Beams & Log Homes
DECK & PORCH CONSTRUCTION
DECK COLLAPSE Case Study
DEFINITIONS of MOBILE HOME, DOUBLEWIDE, MODULAR, PANELIZED CONSTRUCTION
DEFINITIONS of ENGINEERED WOOD OSB LVL etc
DEW POINT TABLE - CONDENSATION POINT GUIDE
DISASTER BUILDING INSPECTION & REPAIR
EARTHQUAKE DAMAGED FOUNDATIONS
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FLOOR, ENGINEERED WOOD & LAMINATES
FLOOR FRAMING & SUBFLOOR for TILE
FOOTING & FOUNDATION DRAINS
FOOTINGS EXPOSED, Repair Methods
FOUNDATION CONSTRUCTION TYPES
FOUNDATION CONTRACTORS, ENGINEERS
FOUNDATION CRACK DICTIONARY
FOUNDATION FAILURES by MOVEMENT TYPE
FOUNDATION INSPECTION METHODS
FOUNDATION INSULATION OPTIONS
FOUNDATION MATERIALS, Age, Types
FOUNDATION REPAIR METHODS
FRAMING DAMAGE, INSPECTION, REPAIR S
FRAMING CONNECTORS & JOIST HANGERS
FRAMING MATERIALS, Age, Types
FRAMING SIZE & Spacing, Age, Types
FRAMING TABLES, SPANS for DECKS
FROST HEAVES, FOUNDATION, SLAB
GRADING, DRAINAGE & SITE WORK
GUTTERS & DOWNSPOUTS
HOUSE PARTS, DEFINITIONS
I-JOISTS, Wood Roof Floor
ROOF ICE DAM LEAKS
INSECT INFESTATION / DAMAGE
LOG HOME GUIDE
LVL Laminated Veneer Lumber, Beams
MOBILE HOMES, DOUBLEWIDES, TRAILERS
MODULAR HOME CONSTRUCTION
MOISTURE CONTROL in BUILDINGS
NOISE / SOUND DIAGNOSIS & CURE
OSB - Oriented Strand Board
PLYWOOD Roof, Wall, Floor Decks & Sheathing
PORCH CONSTRUCTION & SCREENING
PRE-CUT & KIT HOMES
Preservative-Treated Framing Lumber
RETAINING WALL DESIGNS, TYPES, DAMAGE
RETAINING WALL GUARD RAILINGS
ROT, FUNGUS, INSECT DAMAGE
SEARS KIT HOUSES
SINKHOLES, WARNING SIGNS
CONCRETE SLAB CRACK EVALUATION
CONCRETE SLAB CRACK REPAIR
STAIRS, RAILINGS, LANDINGS, RAMPS
STONE VENEER WALLS
STRAW BALE CONSTRUCTION
STRESS SKIN INSULATED PANELS
STRUCTURAL DAMAGE PROBING
STRUCTURAL WOOD ASSESSMENT
SUMP PUMPS GUIDE
TEST KITS for DUST, MOLD, PARTICLE TESTS
Thermal Expansion Cracking of Brick
THERMAL MASS in BUILDINGS
TIMBER FRAMING, ROT
TRUSS UPLIFT, ROOF
TRUSSES, Floor & Roof
WALL CONSTRUCTION BARRIER vs CAVITY
WATER BARRIERS, EXTERIOR BUILDING
WATER ENTRY in BUILDINGS
WINTERIZE A BUILDING
WOOD STRUCTURE ASSESSMENT
Frost or freezing damage to concrete foundations or floors: this article describes How to Identify & Evaluate Freezing & Water Damage to New Concrete Slabs or Foundations. This article series describes how to recognize and diagnose various types of foundation failure or damage, such as foundation cracks, masonry foundation crack patterns, and moving, leaning, bulging, or bowing building foundation walls.
Types of foundation cracks, crack patterns, differences in the meaning of cracks in different foundation materials, site conditions, building history, and other evidence of building movement and damage are described to assist in recognizing foundation defects and to help the inspector separate cosmetic or low-risk conditions from those likely to be important and potentially costly to repair.
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Foundation question about winter exposure: we have a new home being built and so far only the foundation has been poured and the bottom floor has been laid down. we are from Ontario Canada and it has been a bad winter with a lot of snow and ice.
Our floor has been exposed to an abundance of snow, ice and rain for at least 3 months. The snow and ice has melted and then re froze. Our builder says that this is ok and it will cause no damage. Is this true? Is it ok to have the floor exposed for the whole winter?
Foundation answer: If the concrete was mixed and handled properly for a cold weather pour (some suppliers use special additives to prevent freezing damage during concrete curing) and if the site was prepared and protected properly during the critical early period of curing of the concrete (protect from rain, flooding, freezing), your new foundation is probably just fine.
However since things can and do go wrong in construction and in life, below we describe how to take a look at your new foundation to see if there are any early signs of trouble. Certainly if there were serious damage to a new foundation, it would be far less costly to repair it before, rather than after, framing and other subsequent steps in building construction.
While concrete continues to cure and harden for weeks or months after it has been poured, the new pour is most vulnerable to rain, frost, or water damage when the pour is very new - from the time right after the pour has been completed, for perhaps 24 to 48 hours. After that time, rain and water themselves are unlikely to damage the exposed concerete. Flaking and spalling are the two most common freezing or concrete mix (or finishing process) problems likely when a concrete poured wall or floor are brand new.
However both new or even older concrete in a poured building foundation slab or foundation walls might be damaged by water and frost from other mechanisms such as frost heaves caused by freezing wet soils which can push or even adhere-to and lift below-ground and on-ground structural components, and also settlement caused by soil subsidence due to compression (water causes compression of inadequately-compacted soil below a concrete footing or slab) or erosion (loss of soil washed out from below a concrete wall or floor).
Signs of trouble in a newly poured foundation wall, slab, or floor in cold, wet, or freezing weather
Types of foundation cracks and their cause are discussed in detail at FOUNDATION CRACK DICTIONARY - the direct web link to this foundation diagnosis article is http://InspectAPedia.com/structure/foundation.htm - this article that may help you recognize what's going on with your foundation.
In sum, if a month or two after a new concrete slab or wall has been poured, you don't see flaking, shrinkage cracks or movement-related cracking, then the new pour has not been damaged by freezing or wet condition. But remember that other defects: cracks, settlement, spalling, can occur later in the life of the building.
Continue reading at FROST HEAVE / EXPANSIVE SOIL CRACKS in SLABS
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