Mitchell House Gets A Facelift . . .

Jascin N. Leonardo Finger • April 15, 2013

Or maybe we should call it a chemical peel since nothing was sagging.


With the tremendous support of grants, the Mitchell House’s southern façade is currently being re-shingled. The shingles we are all used to seeing – the dark almost black shingles of many decades – are no longer sufficient to protect the Mitchell House from weather. They have shrunk, curled, and left significant gaps between one another courtesy of sun, rain, and age. This can allow water to penetrate to the sheathing and thus cause rot and those dreaded leaks.

Nathan Killeen of Nathan Killen Old House Restoration is up to the task. Nathan has worked on the Mitchell House for many years with Sanford Kendall who is now retiring and passing the torch. Nathan is very “in-tune” with historic properties and only works on historic structures. He is incredibly knowledgeable. With carpenter Matt Anderson, they have been getting the job done carefully and respectfully – both of the historic house and the carpenters who came before them – mainly in 1790 when the House was built!


Nathan’s work has uncovered some things we knew about and some new things such as sheathing rot. He carefully cut out just the rotted areas and placed in old wood, trying to re-use what he could of the original sheathing – no plywood or pressure treated anything here and not full replacement! Removal of these two small sheathing areas also revealed what we knew already existed, sill rot. So, he carefully dug out the rot – LEAVING the existing sill – and sistered in a “new” piece of wood – nothing new or pressure treated – he used an old piece of lumber. This way the original sill stays and we have strengthened it with this piece that is now attached. That is the right way to do it. Nathan, Matt, and I also signed and dated the back of the new sister piece. Hopefully, it will last another 200 years or so.


We think based on nail holes, that this is only the third time the façade of Mitchell House has ever been re-shingled. The last time was in the 1950s or 1960s and they covered the sheathing with tar paper – something that did not exist in 1790. Tar paper may stop leaks but it also stops moisture from leaving the structure – it acts as a vapor barrier and the Mitchell House cannot breathe. Leaks get trapped and the tar paper and sheathing get wet and then you get – rot and a house full of moisture that cannot escape. So, tar paper is being removed and none is being put back in – just the sheathing and then shingles. What IS being replaced are the splines around the windows, front door, and corner boards. These pieces of cedar – one long piece – stop water from getting behind the framing of the windows and doors and getting to the sheathing. These were once on the House but for some reason when it was re-shingled, they thought tar paper was a better option and did not take into account the age of the House. It NEEDS its splines.


We have also found carpenters’ marks – roman numerals where pieces are to meet   up – sawyer’s marks from when the wood was cut, and even better – shavings from the carpenters when they built the house in 1790! These were stuck between the sheathing and the interior wall in the space or pocket that exists. I recently just found these at another house of about the same vintage that is being worked on in the neighborhood – very, very exciting!



And we owe a BIG thank you to Nathan – and Matt!


Take a look at a few photographs documenting the journey of the “chemical-peel.”


JNLF

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Heat and Humidity

By Jascin N. Leonardo Finger • July 20, 2026
Being Nantucket, we tend to stay cooler than the mainland in the summer though the humidity is often over the top. It often makes me think about people in the nineteenth century and earlier – heck, even well into the mid 1900s, and how they handled the weather. With climate change, we have warmed and our weather is more severe and volatile at times. Instead of a nice gentle rain, we get a deluge and the ground has trouble absorbing that sort of onslaught. But they did did still have heat and humidity – and think of a fire in the hearth all day and the bake oven – if it was a baking day. And now, think of the women standing in front of the firebox and bake oven, or even a cook stove later on. I am sure if the confines of their home, alone, les could be worn but for the most part, those women still had a lot of layers on. I am sure that a cloth dipped into or run under the mouth of the pump and wrung out gently – to keep as much as the cool, moisture as possible – was tied around a neck or stuffed down a dress front (or even in addition to the wet neckerchief).  At the Mitchell House, we get a little of the feeling for this. We have no HVAC in the House so we rely on doors being open – with screens to keep the bugs out – and the roofwalk opened (also with a screen) so that air circulates throughout the House. Air can move nicely through – the heat rises, the air moves up and out of the roofwalk hatch very much as it might have in Maria Mitchell’s day. While we do not have the added (somewhat) drying benefit of the heat of the fire in the kitchen, we do have all of the original horsehair plaster, so the House does remain somewhat cooler and drier overall. But some days, the relative humidity does get up into the 90s in the House – that’s when I say, “Get out your umbrellas!” JNLF

Nantucket Maria Mitchell Association Nantucket Harbor Water-Quality Monitoring Buoy Joins Regional Coastal Observing Network

July 17, 2026
NANTUCKET, MA— The Maria Mitchell Association’s (MMA’s) Nantucket Harbor water-quality monitoring buoy is now part of the Northeastern Regional Association of Coastal Ocean Observing Systems, known as NERACOOS. NERACOOS is one of eleven regional associations that make up the U.S. Integrated Ocean Observing System, or IOOS, NOAA’s national ocean-observing network for gathering and sharing ocean, coastal, and Great Lakes data. This connection means that real-time data from Nantucket Harbor are no longer held only within a local monitoring program. They are now available through the NERACOOS Mariners Dashboard, where scientists, resource managers, educators, mariners, and the public can view Nantucket Harbor conditions alongside other coastal observing sites from Long Island Sound through the Gulf of Maine. The monitoring buoy carries a suite of sensors that track changing conditions such as temperature, oxygen, acidity, nutrients, and underwater light. These measurements show what eelgrass, bay scallops, and other marine organisms are actually experiencing over time. “This is an important step because Nantucket Harbor is now part of a larger coastal observing system,” said Dr. Betsy Sherman, the Maria Mitchell Association’s Senior Marine Science Advisor. “Our data can be compared with data from other sites, used in regional analyses, and placed in a broader environmental context. We are not just looking at Nantucket Harbor in isolation.” The Nantucket Harbor buoy project has been supported by the Great Harbor Yacht Club Foundation, whose early investment helped make continuous water-quality monitoring in Nantucket Harbor possible. Additional support has been provided by the Remain Nantucket Fund at the Community Foundation for Nantucket, the Osceola Foundation, the Sociable Weaver Foundation, and through collaboration with the Town of Nantucket Harbormaster. The timing is especially relevant for coastal communities because NERACOOS is also leading the newly funded NSF Seafood Engine in New England, a regional effort focused on strengthening fisheries, aquaculture, seafood technology, and coastal economies. For an island community facing changes in water quality, habitat, fisheries, and climate, joining this regional network strengthens the scientific foundation for understanding and protecting Nantucket Harbor. The Maria Mitchell Association was founded in 1902 to preserve the legacy of Nantucket native astronomer, naturalist, librarian, and educator, Maria Mitchell. After she discovered a comet in 1847, Mitchell’s international fame led to many achievements and awards, including an appointment as the first professor of astronomy at Vassar College. Maria Mitchell believed in “learning by doing” and today that philosophy is reflected in the MMA’s mission statement, programs, research projects, and other activities. The Maria Mitchell Association operates two observatories, a natural science museum, an aquarium, a research center, and preserves the historic birthplace of Maria Mitchell. A wide variety of science and history-related programming is offered throughout the year for people of all ages.  ####

Walk Accompli!

By Jascin N. Leonardo Finger • July 13, 2026
Finished. Finis. Completed. Done. Accomplished. The Mitchell House roofwalk is now done. Back to looking a bit more normal up on the ridgeline. But as I may have noted in the other post about the roofwalk, the one that was removed due to its condition and how it sat on the roof’s ridge was far from the original – or even a nineteenth century one. I am including an image from about 1908 or so in order for you to see the Mitchell House without a walk – even then. Now, an interesting fact is that I am able to date the undated photo because in the west image – where you see the open year – you can actually see the shadow of the Maria Mitchell Vestal Street Observatory – at the backside of the 1825 Kitchen. And given that shadow you also know its late afternoon since that side of the House, as noted, faces West. Another interesting feature is the long downspout – more like a side spout – that takes water from the front gutter, along the upper West façade of the House and across a window and then over the 1825 Kitchen roof where it terminated in a cistern – still in existence under the ground today. JNLF
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