Expert Advice on How to Replace Windows in a Brick House

A cracked brick edge or draft slipping through a window frame is a warning sign! If you’re a homeowner trying to figure out how to replace windows in a brick house, this article is for you.

The process of window replacement in a brick house might look simpler on paper than it is in reality. Brick adds layers of risk, from damaging mortar to creating hidden leaks that spread over time.

In this guide, we’ll cover what makes brick openings different, the real choices between insert and full-frame replacement, and where DIY ends and professional installation should begin.

What Makes Brick Openings Different

Brick walls aren’t built the same as wood siding. Some homes have a brick “skin” (or veneer) with a small gap behind it that helps drain water and protect the wall from damage. Other homes are made of solid brick, which holds weight differently and is built to absorb moisture. Both setups make window replacement more sensitive. If details are skipped, water can get trapped, and the wall can erode over time.

Your attachment points change, your drainage plan changes, and your tolerances shrink. Shimming and squaring need a lighter touch so you do not stress the veneer. Plan on pan flashing at the sill, head flashing above, and integration with the wall’s WRB so water sheds out, not in. For background on flashing concepts, see the International Code Council.

Decide: Insert VS Full-Frame Replacement

Insert replacement lets you keep the existing frame. You preserve the interior trim, BUT you’ll also be stuck with any frame distortion and lose some of the visible glass. Sealing to old frames in masonry openings can be tricky, especially if past leaks or paint build-up left an uneven surface.

Full-frame replacement removes the old frame and exposes the sill and cavity. That lets you rebuild proper flashing, reset air sealing, and correct out-of-square conditions. If you are weighing how to replace windows in a brick house, start by checking for rot, staining, soft drywall at jambs, and drafts that point to hidden gaps.

Time and cost differ. Inserts are faster with fewer finishes to touch up. Full-frame takes longer and may require minor interior repair, yet it often solves the root problems rather than covering them.

Safety, Codes, and Permits in Maryland

Homes built before 1978 call for lead-safe practices. Most experienced window installation professionals know to follow the EPA’s Renovation, Repair, and Painting rules, and homeowners should also work lead-safe.

Permits vary by county. Some like-for-like swaps pass without a permit, others require one, so confirm with your local office before you schedule work. Understanding how to replace windows in a brick house in Maryland also means knowing how to obtain the appropriate permits. Most licensed contractors in Maryland will handle the paperwork and approvals for you.

Tools, Materials, and Prep Checklist

Bring materials that work well with masonry and water. Use pan and head flashing tapes compatible with brick, high-quality sealant, backer rod, and low-expansion foam for controlled air sealing.

Have non-marring pry bars, masonry bits, and stainless or coated fasteners rated for the application. Protect edges with temporary shields and work slowly to avoid veneer stress.

Before you begin, read the window manufacturer’s installation guide and review best practices from groups like FGIA. Professionals understand these instructions and follow them to the letter.

How to Replace Windows in a Brick House: Step-By-Step Overview

Expose and Assess the Opening

Remove the sashes and frame with care. Protect brick surfaces, then check the sill, cavity, and sheathing for staining or softness. Photograph what you find.

Create or Restore Drainage at the Sill

Form a sloped pan or use a compatible sill flashing. Lap to the exterior and plan weeps so water exits the wall.

Dry-Fit, Shim, and Fasten

Center the unit, check level, plumb, and square, then shim to hold shape. Fasten per the window maker’s masonry instructions and avoid over-tightening.

Flash in Sequence

Bottom, sides, then head so upper layers shed over lower layers. Tie into the WRB or existing felt wherever you can reach.

Air Seal and Insulate

Use backer rods to set joint depth. Apply low-expansion foam at the perimeter and keep drainage paths open to the exterior.

Exterior Finish and Sealant Joints

Match brickmould dimensions and sightlines to neighboring openings. Tool sealant to a smooth hourglass profile for durability.

Final Quality Test

Operate the sash, check reveals, and do a light spray test. Record labels and warranties for your files.

Energy Performance and Aesthetics that Fit Brick

You want comfort without losing your home’s aesthetic and character. Low-E glass, argon fills, and tight air sealing improve temperature stability and cut glare. Better energy performance also means a lower heating and AC bill. ENERGY STAR explains how ratings translate into serious savings.

Proper air sealing delivers gains that rival glass upgrades, especially if your old frame leaked.

Additionally, frame color, casing depth, and brickmould profiles should all fit with your home’s existing aesthetic.

When to Bring in a Window Installation Expert

STOP and call a specialist if:

• You see crumbling mortar
• You encounter a bowed or rusted lintel
• You catch chronic leaks
• You’re unsure what sits behind the veneer

If you’re taking on a multi-opening project, you’ll also benefit from professional staging, consistent flashing practices, and backed warranties.

From One of Our Clients:

“Hard to find a good and professional contractor. I found that and more with M&C Global Construction.” — Melissa

So, if you want predictable results, work with a contractor who knows brick construction inside and out.

Key Takeaways

• Brick changes the rules for attachment, drainage, and tolerance.
• Inserts reduce disruption, but full-frame often fixes hidden water and air issues.
• Flashing sequence is critical: pan first, then sides, then head.
• Speak with a window installation expert to evaluate your brick openings, scope, and budget.

Ask for a Brick-Safe Window Assessment and a Clear Plan You Can Trust

Replacing windows in brick is NOT just another home project. Fixing errors could be expensive and time-consuming. When flashing, sealing, and alignment are handled with care, you avoid the kind of problems that cost far more to correct later.

That’s why our team at M&C Global Construction takes time to inspect your openings, explain your options, and map out a plan that fits both your home and budget.

You’ll know what to expect at every stage, from preparation to final walkthrough, so the results last and your brickwork stays intact. Our straightforward approach can help you save money, time, and stress in the long run, without cutting corners on quality.

Get a Free Quote from M&C Global Construction Today

Contact us online today to request a quote or call us at (301) 575-7305.