Texas Gravestone Conservation
Texas Gravestone Conservation

Services & Examples of Work

The services that I most frequently provide are cleaning, re-setting, and repairing broken stones.  I also duplicate socket-type bases made of limestone when the original is too damaged or fragile to hold the stone, and I will repair broken finials/urns.  Whether you own land on which there is an old cemetery in disrepair, or a deceased family member’s gravestone has shifted and is askew, I can provide my skills and services to conserve the stones in question.  I also photograph jobs for my own reference, and will email them to customers if they wish; this is especially good for clients who are not close to the cemetery.



Cleaning gravestones is probably the most frequent work done by untrained individuals.  Many people have asked me while I worked “What brand of bleach do you use?”  When I reply that household bleach, while known for whitening surfaces, is one of the more detrimental solutions that can be put on a gravestone, they are shocked.  Likewise, untested products such as "Wet & Forget" may show immediate results; however, the long-term effect on gravestones is not known.  The product that I use 95% of the time is called D/2 Biological Solution (see "Links" page).  It is relatively expensive at $45 or more per gallon, but its thorough testing, environmentally-safe composition, long history and use at some of the country’s most sacred sites has ensured its success.  Another cleaner that I have used in the remaining cases is Prosoco’s Enviro Klean Revive.  I will not pressure wash any stone.


Cleanings may involve scraping lichens from the stone’s surface using soft plastic scrapers or scraps of soft wood.  Various non-metallic brushes are used, and in the end, lots of fresh, clean water is used to rinse the biologicals and cleaning solution from the stone.  Most cleaning solution manufacturers do not recommend cleaning at temperatures below 50° F; I usually recommend cleaning to be done from March to November as the temperatures will be warm enough for the solutions to work effectively.


The photos below show a small stone before cleaning with D/2, after cleaning (and drying), and 8 months after cleaning.  While there is a change in the appearance of the stone just after cleaning, many biologicals take some time to be flushed from the stone and its surfaces.

Before Cleaning



After Cleaning



8 Months Afterward



This early marble stone in the Independence Cemetery was soiled with some tree products, as well as several forms of lichen.

The same stone after being reset and cleaned with D/2 and a medium stiff natural bristle brush. 



Resetting involves removing a stone from its current position to re-make its base level and the stone plumb.  In most cases, the base and the inscribed portion of the stone are separated.  An appropriate amount of soil or failed concrete under the base is removed and replaced with a more stable aggregate which is firmly tamped down.  The base is replaced and the aggregate is added to low areas or removed from proud areas until the base is level in both directions.  The top portion of the stone is then replaced, either being mortared in with Ecologic naturally hydraulic lime (NHL) mortar, affixed with small dabs of epoxy, or set upon wedge lead and/or monument setting compound.  For bases and stones too heavy to move by hand, a tripod is used along with a chain hoist and nylon slings or a Monumentall clamp.  I do not use any power machinery to reset stones.    I am frequently emailed about a stone that was broken by someone's attempt to straighten it or put it back on a base.  Besides the chance of damaging the stone, you might be injured.  Don't try it just to save money.


The following photos show a large marble obelisk, a marble tablet, and a  modern granite monument being reset.

Initial view of stone during survey of cemetery.



Tripod in place with obelisk removed.



All parts of monument disassembled in order to excavate sand and replace with stable aggregate.



The reset monument.



View of stone prior to conservation.



After removal of main portion and original bottom part which was under the stone.


Tripod used to lower top portion onto reset bottom; repair done with epoxy and clamps, and 1x2's in place for support.



Stone several months later, and after cleaning.



Resetting a Granite Die and Base

While granite has been widely sold since the 1920's and termed the "Rock of Ages", many older stones are found tilted, shifted, and even fallen.  Primarily, this occurs from either a poorly done concrete base under the stone, or compaction of the soil on one side of the stone.  Click on the photo to read the caption.

Broken Stones


Older stones (and especially those of marble) that are thin or that have intricate parts, are frequently found broken or damaged.  If the pieces can be found, they can be cleaned and dry fitted together.  At that time, missing pieces are noted and the judgement can be made on infilling the missing areas with mortar made of NHL and marble dust.  The broken pieces are epoxied together using Akemi Akepox 2030.  While not designed for super-strength bonds, this adhesive was designed for stone bonding and has not failed in any case that I have used it.

Drilling and pinning the stone together is also a method I may use.


The following photos show a medium-sized tablet stone that was reassembled and conserved.  Click on a photo to read the caption.

Infill Used When Pieces of the Stone are Missing


This was the condition of the stone when I first visited the cemetery.  After probing the soil for 30 feet around the base, no more pieces could be found.

Even after consolidating the pieces, the missing areas are obvious and would detract from the appearance.  (The "bonnet" or top portion was not yet epoxied into place in this photo).

304 stainless rods were epoxied into shallow holes that had been drilled into both top and bottom pieces; these would add strength to hold the "bonnet" in place, as well as give an anchor to the infill that would replicate the missing pieces.  limeworks.us Lithomex was used for the infill.

The stone, reset in its socket base at the cemetery.  While not a perfect match, the infill allows the stone to keep most of its original appearance and allows it to be reset upright.

Conservation of Two Marble Urns

The following photos show the "start to finish" process of repairing two marble urns that had either been damaged from the iron pin used to anchor one when it was made or to repair an old break.  Prosoco HCT and H100 consolidant was used before any epoxying was done.  Click on the photo to read the caption.

Thoughts for Spring

Metalwork (fences, grave enclosures, crosses) in cemeteries is often overlooked when stonework is being considered.  DON’T make the mistake some cemeteries have in allowing a sandblaster to ‘blast’ the object(s) and spray paint them.  The National Center for Preservation Technology and Training (NCPTT) in Nachitoches, LA is the federal government’s laboratory for formulating and testing methods and products for conservation.  Their study shows that conservation of metal objects needs to be as focused and stringent as that for gravestones.  Currently, I am studying metal conservation and should be able to provide that service, if needed, later this year.  Contact me if you have any questions regarding metal conservation.


If you'd like more information, contact me at

(979) 836-7715, herzogtamu89@gmail.com

or browse my website.

Print Print | Sitemap
© Texas Gravestone Conservation - 1&1 MyWebsite