- By Forte
- In Brick Work
Is Brick Sealing in Ottawa worth it?
If you live in the National Capital Region, you already know that our local weather does not hold back. From sub zero winter blasts and endless freeze thaw cycles to heavy spring rains, exterior building materials take a relentless beating. For homeowners with brick facades, one question frequently comes up as part of routine property maintenance: Is brick sealing in Ottawa actually worth the investment?
As professional Ottawa brick and stone masonry contractors, we get asked this question almost daily. Some homeowners view masonry sealing as an essential line of defense, while others worry it might trap moisture or alter the aesthetic appeal of their historic or modern brickwork.
To help you make an informed decision, let’s break down how brick sealing works, the realities of Ottawa’s climate, and when sealing should be paired with other vital services like brick repointing or chimney repair ottawa.
Understanding Ottawa’s Climate and Your Brickwork
Clay brick is inherently durable, but it is also porous. Think of a brick like a dense sponge: it can absorb moisture when exposed to driving rain or melting snow.
In a mild climate, minor moisture absorption might evaporate harmlessly. However, Ottawa winters present a unique challenge. When water gets trapped inside the pores of a brick or mortar joint and temperatures plunge below freezing, that water expands by roughly 9%. This expansion generates immense internal pressure, leading to:
Spalling: The face of the brick flakes, cracks, or pops off entirely.
Mortar Deterioration: Joints crumble and wash away, requiring professional masonry repairs or complete brickwork repair.
Efflorescence: Unsightly white salt deposits pushing through the surface as moisture evaporates.
When executed correctly, professional brick sealing ottawa acts as an invisible, breathable shield that stops liquid water from penetrating the brick face while allowing internal vapor to escape.
Is Brick Sealing in Ottawa worth it?
Brick sealing in Ottawa can be worth it but only after a professional inspection confirms that the brickwork is sound, clean, dry, and free of active water entry problems. A breathable, penetrating sealer may reduce water absorption on suitable masonry; however, it cannot repair cracked brick, failed mortar, poor drainage, leaking flashing, or a deteriorating chimney.
For Ottawa homeowners, the best answer is rarely “seal everything.” Our local freeze thaw conditions make moisture management especially important. If water is already getting behind or into the masonry, the wrong coating can reduce drying and contribute to more serious problems over time. Therefore, repairs and drainage corrections should come before brick sealing.
At Forte Masonry Contracting, we have spent more than 20 years helping Ottawa homeowners assess brick, stone, chimneys, mortar joints, foundations, and exterior finishes. As a family owned local masonry company, we focus on recommending the work the building actually needs not a one size fits all coating.
The short answer: when is brick sealing worth it?
Brick sealing is worth considering when your masonry is in good condition and needs additional protection from rain exposure, salts, staining, or repeated wetting. It is most appropriate when a qualified masonry professional confirms there are no open mortar joints, loose bricks, active leaks, trapped moisture, failing caulking, or structural concerns.
A suitable exterior product is generally a penetrating, vapour permeable water repellent, rather than a thick film forming coating. The goal is to reduce liquid water absorption while still allowing moisture vapour to move out of the wall. In cold climates, this distinction matters: masonry that cannot dry properly is more vulnerable when absorbed moisture freezes and expands.
However, sealing is not the right first step if you notice:
Cracked, flaking, or spalling brick
White powdery staining, known as efflorescence
Crumbling, recessed, or missing mortar joints
Loose bricks, bowed walls, or damaged stone
Water staining around a chimney, windows, doors, or parapet
Leaks, damp interior walls, or basement moisture
Damaged flashing, coping, eavestroughs, downspouts, or grading
In these situations, sealing over the symptom can hide the cause temporarily while moisture continues to affect the wall. Brick manufacturers specifically advise identifying and correcting the moisture source first; they caution that waterproofing sealers can inhibit masonry drying.
Why Ottawa brick needs careful moisture control
Ottawa masonry faces rain, snow, wind driven moisture, road salt, and repeated temperature swings. Brick and mortar are porous by design. Some moisture exposure is normal, but problems start when the wall is repeatedly saturated or cannot dry effectively.
During freeze thaw cycles, water inside pores can freeze and expand. Over time, that pressure can contribute to cracked faces, flaking surfaces, and spalling. Excess moisture is a major contributing factor, so the first task is always finding where that water is entering: damaged mortar, failed flashing, leaking chimney caps, deteriorated caulking, poor drainage, or another defect.
This is why professional brick sealing in Ottawa should be part of a maintenance plan not a shortcut around masonry repairs.
A typical Ottawa example
A homeowner notices white staining and brick flaking beneath a chimney. It may be tempting to apply a sealer immediately. Yet the better solution could be to repair the chimney crown, address deteriorated mortar joints, replace defective flashing, and rebuild damaged brickwork where needed. Once the masonry is stable, dry, and properly detailed, an appropriate breathable treatment may be considered for suitable exposed areas.
If your chimney shows cracking, loose brick, missing mortar, or water related damage, start with a professional chimney repair in Ottawa assessment rather than treating the exterior surface alone.
Benefits of sealing sound brickwork
When it is correctly specified and applied to appropriate masonry, brick sealing can offer practical benefits.
Reduced water absorption: A penetrating water repellent can limit how much rainwater enters a porous masonry surface.
Less freeze thaw exposure: Keeping excessive liquid water out of sound brick may help reduce the conditions that lead to moisture related surface damage.
Improved stain resistance: Some sealers make exterior masonry less susceptible to dirt, salts, and certain surface staining.
Easier maintenance: Water repellent surfaces can be easier to keep clean when they are already in good condition.
Protection for highly exposed locations: Chimney stacks, parapets, garden walls, masonry near splash zones, and wind driven rain exposures may need additional attention after the underlying details are corrected.
A breathable silane or siloxane based product is commonly used where water repellency is desired without creating a visible surface film. These products are designed to reduce liquid water penetration while allowing water vapour to escape.
Still, a sealer is only as useful as the masonry beneath it. It does not replace brick, restore failing mortar, rebuild a chimney, or correct water movement around the home.
When brick sealing is not worth it
Brick sealing is not worth it when it is being used as a substitute for repair. In fact, applying an unsuitable coating to already wet or damaged brickwork can make the condition harder to diagnose and may restrict drying.
Avoid treating sealing as the solution when you have:
Failing mortar joints
Mortar that is cracked, washed out, soft, or missing lets water enter at the joints. The correct solution is usually brick repointing, which involves removing deteriorated mortar to an appropriate depth and replacing it with compatible new mortar.
Repointing protects the wall assembly and preserves the brick. It also targets the actual point of failure instead of applying a surface treatment over it.
Damaged or spalling brick
Brick faces that are flaking, breaking apart, or crumbling need professional evaluation. The damaged units may require removal and replacement as part of masonry restoration and repairs.
Sealer cannot bond loose material back together or restore the original strength of a deteriorated brick.
Chimney leaks or chimney deterioration
Chimneys receive heavy weather exposure and are common sources of masonry water problems. Open joints, cracked crowns, damaged caps, failed flashing, and deteriorated bricks must be addressed directly.
For these issues, choose professional chimney masonry repair first. Once the chimney is properly repaired, further protective recommendations can be made based on its exposure and condition.
Foundation or parging problems
Parging is a protective and cosmetic cement based coating commonly applied to exposed foundation walls. If you see cracking, detachment, or crumbling parging, brick sealing is not the remedy. You may need an assessment for parging in Ottawa or broader masonry repair instead.
Likewise, active basement water problems require investigation of drainage, grading, cracks, and waterproofing details not a quick coating applied to exterior brick.
What type of brick sealer is best for Ottawa?
For sound exterior brick, the safest conversation usually starts with a breathable, penetrating water repellent. These products penetrate the surface rather than leaving a thick, glossy film on top.
A qualified mason will consider:
Brick type, age, porosity, and existing condition
Mortar type and mortar joint condition
Whether the wall has historic or softer masonry
Existing paint, coatings, stains, or efflorescence
Chimney, roofline, flashing, window, and sill details
Water runoff, grading, downspouts, and splashback
Whether moisture is entering from the exterior or from within the wall system
Product compatibility and a discreet test area before full application
Do not assume that “waterproof” means “best.” Many masonry experts warn that sound brick often does not need coating at all, while the wrong coating can trap moisture or impair
Comprehensive Protection: Beyond Just the Bricks
A successful exterior defense strategy involves looking at your entire masonry ecosystem. Bricks rarely fail in isolation; they are usually affected by adjacent elements on your home.
1. Chimney Maintenance
Your chimney is the most exposed structure on your property, taking the brunt of wind, rain, and ice from every direction. If your chimney is leaking or showing signs of structural leaning, a simple brick seal won’t save it. Comprehensive chimney masonry repair or a targeted chimney repair ottawa project must be completed to secure the crown, flashing, and flues before waterproofing the exterior stack.
2. Foundation and Below Grade Protection
Moisture doesn’t just attack from the sky; it also wicks up from the ground. If your home’s foundation is suffering from crumbling or flaking concrete near the base, water can travel upward into your lower brick courses. Applying durable cement parging or concrete parging seals the foundation line, stopping moisture at the source. For homeowners dealing with damaged parging coats, our specialized parging ottawa services restore both structural integrity and clean curb appeal.
Our brick sealing process
Forte Masonry Contracting approaches brick sealing as part of responsible masonry maintenance. Before recommending a product, we assess whether the building needs repair, restoration, repointing, chimney work, parging, or a carefully selected water repellent treatment.
1. Inspect the masonry and water paths
We examine the brick, mortar joints, chimney components, window and door interfaces, exposed edges, drainage details, and visible signs of moisture movement.
2. Identify the cause of deterioration
If there is efflorescence, cracking, flaking brick, or water staining, we determine whether the cause is failed mortar, a chimney issue, a flashing problem, poor runoff, or another condition. Efflorescence on older masonry is a warning sign to investigate moisture sources before cleaning or sealing.
3. Complete needed masonry repairs
Before sealing, we address the work that protects the structure: brickwork repair, mortar joint restoration, chimney repair, stone repair, or cement parging where appropriate.
Explore our complete range of Ottawa masonry services for brick, block, stone, cladding, foundations, repointing, parging, chimneys, resurfacing, slabs, and window sills.
4. Clean and prepare suitable surfaces
Masonry must be clean, stable, and dry enough for the selected product and application conditions. Any cleaning approach should be compatible with the brick and mortar; aggressive methods can damage older masonry.
5. Apply the right treatment only where it makes sense
If sealing is appropriate, the chosen product and application method should match the surface, exposure, and manufacturer requirements. A small test area can confirm that the appearance remains acceptable before wider application.
How often should brick be sealed?
There is no universal schedule for brick sealing. Longevity depends on the masonry’s condition, exposure, product selection, preparation, installation quality, and local weather.
Rather than sealing on a calendar, inspect your masonry periodically and arrange an assessment when you see new cracking, mortar loss, surface flaking, staining, or recurring water issues. In many cases, maintaining mortar joints, drainage, flashing, caulking, and chimney details offers more value than automatically resealing a wall.
Brick sealing FAQs
Does brick sealing stop leaks?
Not necessarily. Sealer may reduce water absorption through an otherwise sound surface, but it will not fix an open mortar joint, failed flashing, cracked chimney crown, missing brick, leaking roof detail, or drainage issue. Water entry problems need diagnosis and repair first.
Can sealing damaged brick make things worse?
It can. A film forming or poorly chosen sealer can restrict drying and leave moisture trapped within the masonry system. In Ottawa’s freeze thaw conditions, trapped moisture can increase the risk of damage.
Should I seal a brick chimney?
A chimney should first be inspected for failed mortar, cracked crowns, loose bricks, defective flashing, and damaged caps. Sealing may be considered only after necessary chimney repair Ottawa work is completed and the masonry is suitable for a breathable treatment.
Is brick repointing better than sealing?
They serve different purposes. Brick repointing repairs deteriorated mortar joints; sealing reduces water absorption on an otherwise sound surface. If mortar is failing, brick repointing is the priority.
Can I seal parging or concrete?
Concrete and cement parging require product specific evaluation because surface condition, cracking, adhesion, moisture, and exposure all matter. If your foundation finish is cracked or failing, begin with a professional concrete parging assessment rather than applying a coating over loose material.
Get an honest brick sealing assessment in Ottawa
If you are considering brick sealing in Ottawa, Forte Masonry Contracting can help you determine whether it is a worthwhile investment or whether masonry repairs should come first. We provide practical guidance for homeowners throughout Ottawa and surrounding communities, with work that includes brickwork repair, masonry restoration, chimney masonry repair, brick repointing, cement parging, and stone masonry.
Request a quote from Forte Masonry Contracting for an inspection and clear recommendation. If sealing is appropriate, we will explain why. If your home needs repair first, we will help you address the actual cause of the problem so your masonry can perform well for years to come. Whether you need comprehensive masonry repairs, meticulous masonry fireplace updates, or professional guidance on protecting your exterior, our team has you covered.
