Antique & traditional log cabins & homes:

This article explains the inspection and diagnosis of rot and leak damage on older log homes and other log structures.

This series of 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 antique log cabin in Molde, Norway.

Guide to Inspection & Damage on Old & Antique Log Home Diagnosis & Repair Guide

The antique log cabin shown in this photo was found along the Susquehanna River in Pennsylvania during a log cabin driving tour we took in 2007.

In photos and with comments below we point out some of the construction techniques and the resulting condition of these homes.

These small cabins varied considerably in condition; the second cabin in this row was collapsing, almost certainly because its owner did not maintain the roof, which was collapsing when we found these homes.

The principal causes of extensive rot damage we observed on this string of log cabins along the river included:

• Failure to keep the roof intact, letting water enter the structure and run down both sides of the log walls
• Logs at ground level not protected from soil contact
• Leaks around the chimneys, sending water down the logs behind and abutting the chimney

Rot at the ends or at lap joints of logs in an antique log homes is a principal point of damage on these structures, as evident in this photo (left) of an antique log structure in Molde, Norway.

Notice that it was the lower splice log that has suffered most in this construction detail.

Notice the careful detailing at the log ends in this photo of another antique log structure in Norway?

Those sloping covers and sloping sides of wood piers shed water to extend the life of these wood members.

Below we show what happens when the ends of logs are not properly protected from water uptake.

Here we show that a simple stone slab can break the insect and water path between the supporting structure of a log home and its wooden pier.

This construction detail was observed in many log homes in Norway.

The Green Cabin

This vertical log walled green cabin was built in the 1920s as a fishing getaway,

yet contained rudimentary plumbing that was not retained eighty years later when the building was renovated.

Above: the vertical and horizontal log walls are shown from the cabin's interior.

More details of the original structure are

at VERTICAL LOG WALL CABINS

When the cabin was repairedin 2006, wall by wall, and then the roof, the owners eliminated its crawl space by pouring a concrete slab, then converted from vertical to horizontal log slab siding (below).

The footprint of the original structure was retained. Later we found the remains of a larger front porch that had extended across the original cabin, extending out three meters - not present in these photos.

This remains in frequent use as a dry (no plumbing) guest cottage.

The Elk Lake Cedar Log Cabin

This cabin, located in northern Michigan, was constructed by a group of friends in the mid 1930s. In exchange for labor building the original workers were given adjoining plots of land.

The logs used to build this cabin were harvested right on the site and local stones carried to build a large center chimney with an enormous thermal mass.

The principal bedroom, located beind this fireplace, benefits from the heated stones - or did.

Jute or Hemp Log Chinking

Below: Original hemp log chinking is visible inside where we show as well a log corner detail: these logs were butted or possibly mortised into a squared vertical post.

...

Below:

Normal log splits or checking are found in nearly all logs. The absence of sagging in master log joists that span the full width of this cabin and that have been in place since 1935 testify that log checking is not a structural worry.

This Michigan cabin was still in use in 2020.

Madeline Island Wisconsin Log Cabin

Antique Log Walls Are Still Standing after Roof Long Gone

Once the roof has been lost most buidings do not stand very long, but this log structure, found near the northeast corner of Madline Island, Wisconsin.

Madeline Island, named for Madeleine Cadotte, daughter of Chief White Crane and wife of fur trader Michael Cadotte, is in Lake Superior, part of Ashland County, Wisconsin, and has been historically a spiritual center of the Lake Superior Chippewa.

The island was "discoveredf" by French explorers in 1659, and first settled by Europeans, French fur traders in 1693; Jacob Astor's American Fur Company established a location on the island in 1808 and by 1834 had settled at LaPointe.

These log building remains still spor three walls of the original structure. We think that's in part because of the particular logs used (possibly cedar) and because of the log joinery that produced strong joints at the building corners.

Nails visible in the photos are mostly modern round wire nails, but the structure is clearly considerably older. Clinched cut nails are just visible in the barn-type doors in our last photo below.

[Click to enlarge any image]

We found the logs of this old log building unusual: note the twisted grain.

Above: he log chinking appears to have been further covered with furring strips that themselves were nailed on a cant so as to help water drain off of the wall.

This interesting log structure demonstrates a skilled hand at those dovetailed corner joints between log courses.

Below: the double doors suggest this building, at some point of its life, may have been used as a barn.

Above and below: notice that the builders were not intimidated by having to use logs that were twisted or tapered.

Other log structures on Madeline Island are still in use, including some vacation rental properties in La Pointe, and the Madeline Island museum.

In the photo below of a building at the Madeline Island Museum notice the dovetailed joints and flattened surfaces of the logs.

Photo above: Wikipedia, 2020/11/16

Madeline Island Log Structure Sources:

• Madeline Island Chamber of Commerce, 2020/11/16, original source:https://www.madelineisland.com/madeline-island/island-history/
  
  Excerpt: The island is named after Madeleine Cadotte, daughter of Chief White Crane and wife of fur trader Michael Cadotte. The Ojibwe (Chippewa) and other native peoples made their home here for hundreds of years before European contact.
  
• "Madeline Island Logging Camp", Wisconsin Historical Society, 2020/11/16 including Image ID: 48940, log cabins photographed ca 1910.
• "Madeline Island Museum", Wikipedia 2020/11/16 origina source: https://en.wikipedia.org/wiki/Madeline_Island_Museum

Pines Michigan Wedge-Cut Log Cabin

Located along Route 28 east of Munsing in northern Michigan's upper peninsula, this Pines Michigan log cabin had collapsed when we inspected it in early November 2023.

Still the cabin remains contribute several helpful details about log cabin construction methods including just how the builders cut and joined the logs, how log gap chinking was installed, and what efforts were made to protect the exposed log ends from rot.

Details of what we found are

at DIAMOND WEDGE CUT LOG CABIN

 

Antique & Historic Log Home Preservation & Repair

• Bomberger, Bruce D., The PRESERVATION & REPAIR of HISTORIC LOG BUILDINGS [PDF], Preservation Brief No. 26, U.S. National Park Service, Technical Preservation Services, U.S. Department of the Interior, retrieved 2018/06/17, original source: https://www.nps.gov/tPS/how-to-preserve/briefs/26-log-buildings.htm
  Excerpt:
  The intent of this Brief is to present a concise history and description of the diversity of American log buildings and to provide basic guidance regarding their preservation and maintenance.
  
  A log building is defined as a building whose structural walls are composed of horizontally laid or vertically positioned logs.
  
  While this Brief will focus upon horizontally-laid, comer-notched log construction, and, in particular, houses as a building type, the basic approach to preservation presented here, as well as many of the physical treatments, can be applied to virtually any kind of log structure.
  
  Found in this article series: Guide to Diagnosing & Repairing Leaks & Other Problems on antique or historic log homes. Guide to Identifying, Diagnosing & Repairing Older & Antique Log Homes. Log caulk, spline, gasket, and coating product guide for antique or restored log homes.
  
  Log checking, cracking, shrinkage, & leaks in antique log homes, historic log cabins, or other old log-framed and sided structures. Window & Door Installation Details for repair or renovation of antique Log Homes can prevent later leaks & Damage.
• Grimmer, Anne E., Jo Ellen Hensley, Liz Petrella, Audrey T. Tepper, ILLUSTRATED GUIDELINES on SUSTAINABILITY for REHABIITATING HISTORIC BUILDINGS [PDF] (2011) U.S. Department of the Interior, National Park Service, Standards for Rehabilitation, retrieved 2022/09/2, original source: https://portal.ct.gov/-/media/DECD/Historic-Preservation/03_Technical_Assistance_Research/guidelines-sustainability.pdf
• Goodall, Harrison, LOG CROWN REPAIR & SELECTIVE REPLACMENT USING EPOXY & FIBERGLASS REINFORCING REBARS [PDF] (1989) Preservation Tech Notes Exterior Woodwork No. 3., U.S. National Park Service, Department of Int
• Sheetz, Ron & Charles Fisher, PROTECTING WOODWORK AGAINST DECAY USING BORATE PRESERVATIVES [PDF] (1993) Exterior Woodwork No. 4, National Park Service, U.S. Department of Interior, Denver Service Center, Design & Construction, 12795 West Alameda Parkway, P.O. Box 25287, Denver, CO 80225-0287 USA, retrieved 2018/11/16, original source: https://www.nps.gov/tps/how-to-preserve/tech-notes/Tech-Notes-Exterior04.pdf
• US NPS, HISTORIC VIGA RESTORATION USING SCREW-ON VIGAS [PDF] DSC TECHNICAL BULLETIN 04- 05, National Park Service, U.S. Department of Interior, retrieved 2018/11/16, original source: www.nps.gov/dscw/upload/TechBulletin0405-HistoricVigaRestorationScrewOnVigas_AF_010418.pdf
• Additional older traditional log cabins and fishing camps are illustrated and discussed
  
  at VERTICAL LOG WALLS on CABINS & HOMES
  and
  at CRACKS CHECKS SPLITS in BEAMS, LOGS & POSTS

 

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Reader Q&A - also see RECOMMENDED ARTICLES & FAQs

On 2019-02-23 - by (mod) -

I agree that what you describe sounds risky,

Perhaps you could show us some photos of the cabin exterior and a sketch of the wall cross section

On 2019-02-22 by Charles

Hi!
I own a log house built in the 1700s. It's a cape cod style house and is covered with board and batten siding. That was done by a previous owner. They had framed on the outside and then insulated on the exterior with fiberglass.
My concern is about humidity.

Since the logs are exposed inside will there be much danger in the winter of moisture moving out through those logs and into the insulation thereby causing rot?
I'm sure there must be many cases of this around but I've not personally run into it before.
Any thoughts?
thanks!

Question: what are the random peg holes in some of my logs

(Mar 9, 2014) kay said:
I have restored a 2 story antique log home , built approx. 1800's my question is this: I don't know what the round peg holes are for in some of the logs. they are random inside and outside , some are close to the bottom log and then few are at top of some logs. This is a mystery I'd like to have solved. Thank you

Reply:

Kay,

Use the CONTACT link to send me some sharp photos of the wall showing the situation and closeups of the holes showing pattern, diameter, and maybe you could tell me depth. If they were drilled and dependign on location they may have been to hold pegs for hanging items. If they were at joints they may have been treenails used to secure log connections or log to beam connections.

...

Continue reading at CRACKS CHECKS SPLITS in BEAMS, LOGS & POSTS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see these

Recommended Articles

• AGE of a BUILDING, HOW to DETERMINE - home
• CRACKS CHECKS SPLITS in BEAMS, LOGS & POSTS
• GLUES ADHESIVES, EXTERIOR CONSTRUCTION
• LOG HOME GUIDE - home
  • AIR LEAK DETECTION TOOLS
  • ANTIQUE & OLD LOG CABINS
  • CRACKS CHECKS SPLITS in BEAMS, LOGS & POSTS
  • DIAMOND WEDGE CUT LOG CABIN
  • ENERGY EFFICIENCY of LOG HOMES
  • INSULATION R-VALUE, SOLID LOG WALL
  • KIT HOMES, Aladdin, Sears, Wards, Others
  • LEAK DIAGNOSIS & CURE in LOG HOMES
  • LOG HOME CONSTRUCTION
  • LOG HOME WALL INSULATION VALUES
  • R-VALUES & THERMAL MASS in LOG HOMES
  • ROT, TIMBER ASSESSMENT
  • SEALANTS CAULKS COATINGS for LOG HOMES
  • SHRINKAGE & HEIGHT CHANGES, LOG WALL
  • SLAB SIDING LOG HOMES
  • SPLINE & GASKET DESIGNS for LOG HOMES
  • SPLINE GAPS & GASKET OMISSIONS
  • THERMAL MASS in BUILDINGS
  • VERTICAL LOG WALL CABINS for other antique log cabins
• WOOD BEAM LOG VIGA CRACK REPAIR METHODS

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ANTIQUE & OLD LOG CABINS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

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Citations & References

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