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/ Services

Historic Masonry Restoration & Preservation

Historic masonry does not fail the way modern masonry fails, and it cannot be repaired the way modern masonry is repaired. A 1900s load-bearing brick wall was built with soft, lime-based mortar that was designed to be sacrificial, meaning the joint gives before the brick does. Repoint that wall with modern Portland mortar and you have inverted the system. The mortar is now harder than the brick around it, so when the building moves, and every building moves, the brick face spalls instead of the joint. We are called in to undo that repair more often than we are called in to make the original one.

TNT Tuckpointing & Building Restoration has been restoring Iowa's historic buildings since 1993. County courthouses, churches, downtown historic districts, campus buildings, and National Park Service properties. We match mortar to the original in strength, composition, and appearance. We repair stone rather than replacing it wherever repair is possible. And we investigate the cause of a failure before we scope the repair, because a historic building that keeps getting patched is a building nobody has actually diagnosed.

/ Credentials

Industry Affiliations

ICRI — International Concrete Repair Institute

The professional association setting technical standards for concrete and masonry repair. TNT's membership connects our work directly to the industry's best practices and evolving repair standards.

Preservation Iowa

Iowa's leading historic preservation organization. Membership reflects our deep commitment to the ~50% of our work that involves historically significant buildings — and our familiarity with the preservation standards those projects demand.

SWR Institute — Sealant, Waterproofing & Restoration Institute

The industry body for sealant, waterproofing, and building envelope professionals. Membership here reflects our technical depth in caulking, joint sealants, and water repellent systems — not just installation, but understanding the standards behind the materials.

TMS - The Masonry Society

The Masonry Society (TMS) is a professional community of engineers, architects, builders, educators, manufacturers, and students who share the goal of making masonry design and construction better, safer, and more innovative.

MBI - Master Builders of Iowa

Master Builders of Iowa is the recognized leader of the construction industry in the state of Iowa. Founded in 1912, MBI is one of 89 chapters of the Associated General Contractors of America,  the most influential and widely respected construction association in the country.

MCAA - Mason Contractors Association of America

The Mason Contractors Association of America (MCAA) is the national trade association representing mason contractors. The MCAA is committed to preserving and promoting the masonry industry by providing continuing education, advocating fair codes and standards, fostering a safe work environment, recruiting future manpower, and marketing the benefits of masonry materials.
TNT Tuckpointing & Building Restoration, LLC BBB Accredited Business

BBB - Better Business Bureau

The Better Business Bureau is the nationally recognized standard for business trustworthiness and ethical conduct. TNT Tuckpointing & Building Restoration LLC is BBB Accredited, reflecting our commitment to transparency, honest advertising, and standing behind our work. Accreditation is earned — not purchased — and requires meeting the BBB's standards for trust.

ICRI — International Concrete Repair Institute

The professional association setting technical standards for concrete and masonry repair. TNT's membership connects our work directly to the industry's best practices and evolving repair standards.

Preservation Iowa

Iowa's leading historic preservation organization. Membership reflects our deep commitment to the ~50% of our work that involves historically significant buildings — and our familiarity with the preservation standards those projects demand.

SWR Institute — Sealant, Waterproofing & Restoration Institute

The industry body for sealant, waterproofing, and building envelope professionals. Membership here reflects our technical depth in caulking, joint sealants, and water repellent systems — not just installation, but understanding the standards behind the materials.

TMS - The Masonry Society

The Masonry Society (TMS) is a professional community of engineers, architects, builders, educators, manufacturers, and students who share the goal of making masonry design and construction better, safer, and more innovative.

MBI - Master Builders of Iowa

Master Builders of Iowa is the recognized leader of the construction industry in the state of Iowa. Founded in 1912, MBI is one of 89 chapters of the Associated General Contractors of America,  the most influential and widely respected construction association in the country.

MCAA - Mason Contractors Association of America

The Mason Contractors Association of America (MCAA) is the national trade association representing mason contractors. The MCAA is committed to preserving and promoting the masonry industry by providing continuing education, advocating fair codes and standards, fostering a safe work environment, recruiting future manpower, and marketing the benefits of masonry materials.
TNT Tuckpointing & Building Restoration, LLC BBB Accredited Business

BBB - Better Business Bureau

The Better Business Bureau is the nationally recognized standard for business trustworthiness and ethical conduct. TNT Tuckpointing & Building Restoration LLC is BBB Accredited, reflecting our commitment to transparency, honest advertising, and standing behind our work. Accreditation is earned — not purchased — and requires meeting the BBB's standards for trust.

ICRI — International Concrete Repair Institute

The professional association setting technical standards for concrete and masonry repair. TNT's membership connects our work directly to the industry's best practices and evolving repair standards.

Preservation Iowa

Iowa's leading historic preservation organization. Membership reflects our deep commitment to the ~50% of our work that involves historically significant buildings — and our familiarity with the preservation standards those projects demand.

SWR Institute — Sealant, Waterproofing & Restoration Institute

The industry body for sealant, waterproofing, and building envelope professionals. Membership here reflects our technical depth in caulking, joint sealants, and water repellent systems — not just installation, but understanding the standards behind the materials.

TMS - The Masonry Society

The Masonry Society (TMS) is a professional community of engineers, architects, builders, educators, manufacturers, and students who share the goal of making masonry design and construction better, safer, and more innovative.

MBI - Master Builders of Iowa

Master Builders of Iowa is the recognized leader of the construction industry in the state of Iowa. Founded in 1912, MBI is one of 89 chapters of the Associated General Contractors of America,  the most influential and widely respected construction association in the country.

MCAA - Mason Contractors Association of America

The Mason Contractors Association of America (MCAA) is the national trade association representing mason contractors. The MCAA is committed to preserving and promoting the masonry industry by providing continuing education, advocating fair codes and standards, fostering a safe work environment, recruiting future manpower, and marketing the benefits of masonry materials.
TNT Tuckpointing & Building Restoration, LLC BBB Accredited Business

BBB - Better Business Bureau

The Better Business Bureau is the nationally recognized standard for business trustworthiness and ethical conduct. TNT Tuckpointing & Building Restoration LLC is BBB Accredited, reflecting our commitment to transparency, honest advertising, and standing behind our work. Accreditation is earned — not purchased — and requires meeting the BBB's standards for trust.
/ Why

Historic Masonry Needs a Specialist

Mortar has to match, and matching is not about color

Every historic wall has a mortar that was mixed for the masonry units around it. Softer brick got softer mortar. That relationship is what lets the wall handle thermal movement, settlement, and moisture without cracking the units themselves. When a repair uses a harder modern mix, the wall loses its sacrificial layer and the damage moves into the brick or stone, where it is far more expensive to fix.

Matching means matching compressive strength, permeability, and composition, not just tinting a modern mix to the right shade. On significant buildings that can mean mortar analysis before a joint is touched. The visible color match is the easy part and the least important part.

Stone fails differently than brick, and it fails slowly

Limestone, the material under most of Iowa's civic architecture, does not spall the way brick does. It sugars at the surface, delaminates along bedding planes, and cracks where water has been sitting in a joint or a failed sealant line for years. The correct repair depends on which of those is happening. Consolidation, Dutchman repairs where a sound piece is let into the damaged area, or fabricated replacement in matching stone when a unit is past saving.

Replacing a stone that could have been repaired is the expensive mistake. Patching a stone that needed replacement is the one that comes back. See our stone rebuilding and stone patching and replacement work.

Cleaning a historic building can destroy it

Aggressive pressure washing and the wrong chemicals will strip the fired surface off historic brick, open the pores, and leave a wall that absorbs water faster than it did before it was cleaned. The building looks better for one season and deteriorates faster for the next fifty.

Historic cleaning means the gentlest effective method, tested on an inconspicuous area first, with the chemistry matched to both the soiling and the substrate. See our approach to building cleaning.

/ Investigation

We Find the Cause Before We Scope the Repair

Masonry does not fail without a reason. Water is getting in somewhere, a lintel or shelf angle is rusting and expanding, a previous repair is incompatible, a roof or flashing detail is failing, or the structure is moving. Repair the symptom without finding the cause and the building owner pays for the same repair twice.

A masonry investigation documents the actual condition of the building and identifies the mechanism behind the failure. That may involve close-up inspection at height, selective probe openings, mortar analysis, moisture assessment, and photographic documentation. What comes out of it is a scope tied to what is genuinely wrong, along with a budget the owner can plan against and take to a board or a council.

For historic and civic buildings this is not optional. It is the difference between a restoration and a series of expensive guesses. It is also how a maintenance conversation becomes a funded capital project, because a documented investigation is what a facilities director or a county board can actually approve.

Red brick wall with visible repair area where bricks are discolored and mortar lines disrupted.
/ portfolio

Historic Buildings We Have Restored

See the full portfolio for historic restoration projects across Iowa and the upper Midwest.

What our customers say

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Reviews from Google

/ REVIEWS

4.9 Star On Google

Rated by the building owners and facility managers we serve.

FAQs

We collaborate directly with SHPOs, preservation consultants, and architects throughout the project, providing documentation, mock-ups, and test panels as required. About half of our work is historic preservation, so these working relationships are well established.

It depends on the material and the building. Some modern products perform well and are appropriate, while others can cause damage to historic masonry. We select repair materials based on compatibility with the original construction, not simply what is newest on the market.

Timelines depend on the building's size, condition, and the scope of work. Our active field season runs from mid-February through the end of November, and larger historic projects are often phased across multiple seasons to align with budgets and preservation review timelines.

Structural integrity and historic character are not mutually exclusive. We use repair methods and materials that meet structural requirements while respecting the building's original fabric, ensuring the work satisfies both engineering standards and preservation guidelines.

These are among the most common building types we restore. Churches and government buildings make up a large share of our historic preservation work, with courthouses typically our largest projects by dollar value.

Iowa, Wisconsin, Minnesota, and Illinois each offer state-level historic preservation tax credits, and many communities have local grant programs for historic buildings. Federal historic tax credits are also available for income-producing properties. We can help you understand what documentation your project will need.

We repair, replicate, and restore ornamental terra cotta, carved stone, corbelled brickwork, and other decorative elements using techniques and materials appropriate to the building's period. Where original elements are too deteriorated to save, we fabricate accurate replacements.

Yes. We have extensive experience restoring National Register-listed buildings including churches, courthouses, and civic landmarks. We understand the review processes and documentation requirements these projects demand.

Every project receives a closeout package with photography, warranty, and product data sheets. On historic projects, we provide additional documentation as needed to support tax credit applications, grant requirements, and State Historic Preservation Office reviews.

In many cases, yes. Federal and state historic tax credit programs can offset a significant portion of qualified rehabilitation costs on eligible buildings. We provide the project documentation these programs require, though building owners should consult a tax professional for eligibility specifics.

We analyze the existing mortar composition, color, texture, and joint profile, then develop custom mortar mixes to match. For brick, we source salvage material or work with suppliers who produce historically accurate replacements to maintain the building's original character.

Yes. Our historic restoration work follows the Secretary of the Interior's Standards for the Treatment of Historic Properties. Roughly half of our total project volume is historic preservation, so these standards guide our daily work, not just occasional projects.

/ Start a Project

Contact Us

Our skilled team is here to bring your building to life. Contact us today to discuss your project!