Questions and Answers

We regularly get inquiries about problems people have with their log home or cabin. We'll post some of those questions on our blog in order to reach more people with solutions to problems.

Rot in log homes – What can I do to prevent log rot in my home?

While log rot is a common problem in log homes, it does not have to be. Unfortunately, many log home owners are unaware of the log rot in their structure until the damage is already done.

rotten logs are not aways obvious

At first glance, these look like solid logs.

The reality is that by the time you can see the decay in the wood – it is many times too late to do anything but replace a given log. For this reason, it is important to spend a little time getting to know your log home or cabin.

By this I mean looking for places on the home that could potentially be getting wet. It is really very simple. If an area (for example: log end, sill log, or perlin end) is getting significantly wet during a rainstorm… it is on its way to rotting.

rot is not always obvious

Upon closer inspection, there is rot. Click on photo to see how deep the knife sinks.

I want people to understand that rot is like a tide moving in slowly not an earthquake. Rot happens over a period of at least a few years and most times a decade or more.

So… grab an umbrella next time the clouds well up and take a walk around your log home looking for areas of concern. Make note of them so you know which ones to pay attention to when you do your routine checks. Click here for more information on how to tell if a log is rotten.

Related links:

Lower logs getting wet near a deck?
Maybe I need gutters?
Log extending out to long?

Borate treatment on log buildings is important

Borate treatment being applied

Applying PeneTreat boron-based treatment

Question:  I am refinishing my log home this spring. I have stripped the logs down to bare wood again and I have heard about using borates on the bare wood before staining. Is this is a necessary part of the refinishing process?

Carpenter ants infesting log home

This is what you want to avoid, carpenter ants feeding on your decaying logs.

Answer:  Yes……. borates are a good assurance against rot. They have been around for years and should always be part of the process of finishing when the logs are raw. Borates work by penetrating into the surface of the wood and treating the log against insects but more importantly – against decay.  Borates actually raises the pH level of the moisture latent in the wood to the point that the rot organism and consequently, insects are both impeded.  By doing this treatment, the logs are better protected against future rot and decay.

Related links:

About the process we use: http://restorelogs.com/borate-treatment.htm

Why do logs rot?  http://www.restorelogs.com/blog/log-home-dry-rot-is-a-bit-of-a-misnomer

Log Home Maintenance: What to do about logs that continue to seep out sap or pitch

Log home maintenance has some unique aspects to it compared to maintenance on other types of houses. One unique problem that log homes present is when the sap or pitch from the logs seeps out to the point where it is visible and unsightly.

We received the following question from our blog regarding this common problem with log home maintenance.

Question: Pitch or sap is leaking out from my logs.  I want to know if there is anything that can be done to keep this from happening.

Answer: We have seen a number of log-sided and full log homes that have real problems with pitch seeping out of the logs. Most are homes built within the past 20 years and all are made of some species of pine, be it eastern, white or Norway pine.  Most of the time pitch does stop coming out after about five years.  Often in these cases, the logs need to be blasted to remove the pitch and then the logs need to be re-stained.

In extreme cases, pitch can continue to seep out for many years. It is my opinion that this is happening because the stain on the logs is acting as a blocker and once the stain begins to get older, it starts to fail and break down and this “blocking” effect goes away.  When this happens, the sap is allowed to flow again. Here is an article entitled: “Effective Management of Resin Exudation from Eastern White and Red Pine” done by the University of Maine. Just in case you want more information on this and what resin blockers might be able to do, click here for a PDF of this study.

For more information on other log home maintenance issues, check out some links to our website:

Cracks or checks in logs
Epoxy not recommended for filling cracks
Frequently asked questions

Log homes and wood boring insects

Here is a related question from our previous posting.

Question: I need to get wood-boring beetles and carpenter bees stopped. No serious structural damage yet but the insect problem needs to be addressed. I am the original owner of the home. It was built in 1985 out of southern yellow pine. It was a kit supplied by Real Log Homes out of North Carolina. It was last cob-blasted, borated and sealed in 2004. Borate applied at that time did not stop insects. Need help to get insect damage stopped and house resealed.

Notice the honey combing that the ants do as they "excavate the rot". Until you get rid of the rot, you can't control the population of boring insects.

Answer: What we know about carpenter bees and powder post beetles is that they feed on decaying wood. Therefore, they often are a sign that the logs are retaining moisture and that there is some rot. Borate treatment is not a guarantee against these insects. It isn’t a pesticide but more of a treatment for the logs to raise the PH level of the wood to the point where the rot organism is impeded, and subsequently the bugs are less able to attack it. Click here for more information about insects in log homes. (more…)

Holes in knots in logs

Question: There are holes just in the knots of our log home. Are these from a wood boring insect or are these commonplace in the knots with aging?

Telltale signs of wood boring insects.Answer: It’s hard to say for sure if the holes in your logs are from boring insects but it sounds like they are. Small (or big) holes in your logs are a sign that something is wrong. I would suggest that you tap around the logs near these holes and see if the they sound hollow. If they do, then I would suggest that you have your logs inspected for rot.

At the very least – I recommend injecting these holes with a mixture of borates. The one we recommend for homeowners is called Bora-Care and it is available at Do It Yourself Pest Control.  I hope this helps.

Other helpful links to our site:

We have a brief video showing the application of the borate treatment.

Covering up rotten logs – good or bad idea?

Question: I have a home where the floor beams rotted. I ground off as much of the rot as I could and then I treated them heavily with a borate solution. Next, I sprayed foam insulation over them to seal them off. Do I need to be concerned that they will continue to rot despite my efforts?

Answer: Rot is all about moisture. Sometimes when it comes to the practicalities of doing repairs like yours, one has to leave some rot.  The most important thing to its longevity is to keep that area as dry as possible.  So… it sounds like you are on the right track.  The only thing you might find is that some of the rotted areas could attract carpenter ants and/or powder post beetles.  The borate treatment you used might help this but if the wood boring insects get really annoying, then you need to have an exterminator come in and treat these areas as well.  Good luck.

Leaking around windows – what’s the solution?

We regularly get inquiries about problems people have with their log home or cabin. We’ll post some of those questions on our blog in order to reach more people with solutions to problems.

Window where it has been leaking

Often these leaks cause discoloration of the wood on the interior.

Question: I have a problem with leaking around one of my windows. I have caulked all around it to prevent leading but nothing I have done has solved the problem. What am I missing?

Answer: Sometimes chinking or caulking just around the window is not enough to keep moisture out.  The leak could be coming from above the window and getting behind the trim or into the space between the outer caulking and the inside of the logs.

One solution we have found is to take off the exterior trim and in these cases, we caulk directly against the window jambs. If the leaking seems to be coming in at the top of the window, it is likely that the leak is originating in the logs above the unit.

With extreme situations, all the trim needs to be removed and the entire wall chinked or caulked in combination with flashing above the header trim of the window. Click here for more information about chinking and caulking.