On Sat, 09 Oct 2004 12:10:25 -0400, Danny
wrote:
| Hi,
| I have a tree in the yard that's very large and close to the house. It's
| still living and a viable tree. I have many very large trees close to
| the house that could fall on the house if left long enough or if they
| were to be ravaged by disease.
|
| The one in question has a hollow section near the ground that has some
| insect damage and a resulting hole in the trunk, but right now it's
| growing great and I'd like to fix the damage if possible to stop any
| further damage from happening. I'd like to do this so that I either
| don't have to look at taking the tree down in some years or having it
| fall on the house due to disease.
|
| I saw a product sold at the various home stores. It was some kind of
| pruning sealer. On the back it tells that if you want to seal a cavity
| in the tree to do something such as fill it with xx amount of portland
| cement (I may be wrong on specifics cause I don't have the product in
| front of me, but maybe some of you know what I'm referring to) and put
| it in the damaged portion of the tree (pack it).
|
| Does anyone think that this is a good idea? Has anyone done this sort
| of thing before. I know that the proper thing to do would be to call a
| professional, but I have so many jobs at hand to do that anywhere I can
| save a buck or two will ultimately help me with some big projects that
| I'm going to have to do/have done.
|
| What about the insects/insect damage in the tree. Do you just seal that
| over, or do you do something to it before you pack the cavity with that
| stuff.
|
| If I can just save the tree a few more years to buy time as compared to
| if I'd done nothing, I'd be happy. by then, I'd have more of the stuff
| done that's a higher priority.
|
| Thanks for your help,
|
| Danny
Why Fill a Hollow Tree?
Filling of hollow trees, a process called "cavity filling," was
practiced by arborists for many years. Thanks to modern research, it
has been discovered that cavity filling is not needed to support
orimprove the health of hollow trees. Tree experts have found that
cavity filling with cement can actually damage a hollow tree.
According to Bob Rouse, Staff Arborist at the National Arborist
Association, "the column of cement created in the tree by a cavity
fill doesn’t move, just like a column on a building, but the tree is
always moving. It sways with the wind constantly. The rubbing created
by the swaying tree and the solid column of cement further damages the
tree."
Decay organisms, such as rot fungi, that created the hollow in the
first place are able to take advantage of the new injuries created by
the rubbing and invade the healthy tissue of the tree. Rouse adds, "If
that wasn’t bad enough, the cement holds moisture, creating a
favorable environment in the filled cavity for the decay organisms!"
Tree experts explain that it is much the same as when carpenters place
a vapor barrier between a house’s foundation and the wooden sills. If
they put thesills directly on the concrete foundation, the wood will
rot rapidly. If you place cement in a tree cavity, it will speed the
wood decay!
If cavity filling is desired for aesthetic reasons, there are some new
synthetic foams that can be sprayed into the cavity by professional
arborists. These materials will bend with the swaying tree, but Rouse
warns, "There is really no reason to fill a cavity; it doesn’t improve
the tree’s health and doesn’t offer any added support. If structural
support of a tree is required, a professional arborist will recommend
cables, braces, or tree guys, not cavity filling."
Tree experts recommend:
* not filling cavities with cement;
* supporting, if required, with cables, braces, or tree guys;
* if you must fill a cavity, have a professional arborist install a
synthetic foam fill.
-- National Arborist Association
|