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STRUCTURAL INSPECTIONS & DEFECTS
ARCHITECTURE & BUILDING COMPONENT ID
CHIMNEY INSPECTION DIAGNOSIS REPAIR
COLUMNS & POSTS, DEFECTS
CONNECTORS, FASTENERS, TIES
DECK & PORCH CONSTRUCTION
DEFINITIONS of Mobile Home, Doublewide, Modular, Panelized
DEFINITIONS of ENGINEERED WOOD OSB LVL etc
DISASTER BUILDING INSPECTION & REPAIR
EARTHQUAKE DAMAGED FOUNDATIONS
FIRE DAMAGE vs MOLD DAMAGE
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FOOTING & FOUNDATION DRAINS
FOUNDATION CRACKS & DAMAGE GUIDE
FRAMING DAMAGE, INSPECTION, REPAIR
GRADING, DRAINAGE & SITE WORK
HOUSE PARTS, DEFINITIONS
INSECT INFESTATION / DAMAGE
KIT HOMES, Aladdin, Sears, Wards, Others
LOG HOME GUIDE
MOBILE HOMES, DOUBLEWIDES, TRAILERS
MODULAR HOME CONSTRUCTION
MOISTURE CONTROL in BUILDINGS
PORCH CONSTRUCTION & SCREENING
PRE-CUT & KIT HOMES
RETAINING WALL DESIGNS, TYPES, DAMAGE
ROT, FUNGUS, INSECT DAMAGE
SINKHOLES, WARNING SIGNS
STAIRS, RAILINGS, LANDINGS, RAMPS
STRAW BALE CONSTRUCTION
STRESS SKIN INSULATED PANELS
STRUCTURAL WOOD ASSESSMENT
TIMBER FRAMING, ROT
TRUSSES, Floor & Roof
WATER ENTRY in BUILDINGS
WOOD STRUCTURE ASSESSMENT
This article explains the inspection and diagnosis of rot and leak damage on older log homes and other log structures that used vertical logs to form the building walls.
This series of log cabin articles provides information on the inspection and diagnosis of damage to new and older log homes and includes description of log home insulation values and alternatives, and also a description of the characteristics of slab-sided log homes. Our page top photo shows an older vertical-log walled log home along the Susquehanna river in Pennsylvania.
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At left is a vertical-log cabin in northern Minnesota. Photographed in 2006, this log cabin was built in the late 1920's or early 1930's as a fishing camp.
Thanks to the wisdom of the owners who at least kept a decent roof on the cabin, the log building endured for many decades. But it was in rough condition by the turn of the century, needing floor structure, roof, wall, and window repairs.
The vertical placement of most of the logs on this building permitted the original builders to use local cedar logs cut on this rocky point of land extending into a great lake even though the logs varied widely in diameter.
There was no problem of mating logs of different sizes at the building corners when this approach was used, yet the building corners and structure remained intact, even absent the structural tie of overlapping log ends.
The original log structure was not chinked nor well-sealed but inside the builders nailed furring strips between vertical logs, in some instances using oakum or newspaper as a chinking material behind the furring.
Checking, Cracks, Leaks & Rot Concerns at a Vertical Log Walled Home
Checks in vertical logs do not pose the same risks as in horizontal logs in a building wall, because the checks or cracks naturally drain. This condition puts the logs at less risk for rot or frost damage. But the damage risks are not zero.
For example in the vertical log wall cabin shown here, the builder, or someon else later, poured concrete around the ends of the vertical logs (photo, below left). Unfortunately this detail, illustrated below, trapped water around the base of every log in the wall. Eventually, even though these were rot-resistant cedar logs, they decayed, as you can see at below right.
In comments and photographs below we illustrate the types of damage and log home failures that occurred in this structure.
The principal causes of rot and carpenter ant damage we found at this Minnesota log cabin were
If you see fungus like this growing on a wood structure you can safely assume that significant rot damage is present and that the conditions that caused this damage are old and protracted.
The green cabin underwent an extensive renovation and reconstruction after 2000 and it remains in frequent use as a dry (no plumbing) guest cottage.
Our photo (left) shows the original 1930's home-made sink that included plumbing that drew water from and emptied back into the lake - a system that was removed completely when the cabin was repaired and renovated.
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Frequently Asked Questions (FAQs) about vertical log cabins - walls constructed placing logs vertically
Questions & answers or comments about the design, construction, & repair of vertical log wall cabins & homes.
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