Imperial Windows & Doors provides professional window replacement and door replacement services for homeowners throughout Markham and surrounding York Region communities. We specialize in energy-efficient vinyl windows, fiberglass entry doors, steel doors, sliding patio doors, and custom exterior doors designed for the Canadian climate. Our experienced installation team helps homeowners improve insulation, comfort, curb appeal, security, and long-term energy efficiency with high-quality products and expert workmanship.
Markham homes range from historic properties and established brick houses to newer subdivisions, custom residences, townhouses and high-rise condominiums. Their windows and exterior doors should not all be measured, specified or installed in exactly the same way.
Imperial Windows & Doors provides professional window and door replacement in Markham. We help homeowners compare energy-efficient vinyl windows, steel and fiberglass entry doors, sliding patio doors, glass packages and installation methods based on the actual opening—not a one-size-fits-all promotion.
The right project may involve replacing one failed window, correcting a difficult entrance, improving comfort near large glass areas or coordinating a complete exterior update. It begins with an inspection, clear product selections and a written installation scope.
Request a free in-home estimate for your Markham window or door project.
Markham contains distinct communities built during very different periods. The age of a house does not determine the installation method by itself, but it can point to conditions that deserve closer inspection.
Markham’s historic areas include traditional buildings, later additions, infill homes and properties protected through heritage designation. Original openings may have wood frames, non-standard dimensions, older masonry or trim details that contribute to the building’s appearance.
On a protected property, changing the visible frame material, profile, colour, grille pattern or opening size may require heritage review. Product selections should therefore be confirmed with the City before custom windows or doors are ordered.
Even outside a designated property, older openings should be examined for deterioration, previous water entry and multiple layers of earlier renovation work. Covering a weak frame with new capping does not correct the underlying condition.
Many established Markham subdivisions contain brick detached houses and townhouses whose original windows are reaching different stages of wear. Homeowners may notice failed sealed units, increasingly difficult operation, damaged balances or cranks, deteriorated caulking and rooms that feel uncomfortable near the glass.
Several units may have been installed at the same time, but they do not always fail together. An opening-by-opening assessment helps determine whether to replace the complete house, complete the work in phases or repair selected components.
Newer communities frequently feature larger combinations of fixed and operating glass, architectural shapes, stone accents, walkout openings and coordinated front elevations. The project may focus on replacing builder-installed products, updating dark exterior colours, increasing comfort or choosing a different operating configuration.
Changing a style can affect frame sightlines, ventilation, cleaning access and the appearance of neighbouring windows. Large front elevations should be reviewed as a complete design so the frame widths, colours, grille patterns and glass tones remain balanced.
Larger or custom homes can include tall entrance systems, transoms, oversized fixed glass, bay or bow windows and specialty shapes. These products require careful measurements, appropriate reinforcement and a clearly documented finishing scope.
The biggest or most expensive glass package is not automatically the correct one. Orientation, room use, frame colour, solar exposure, ventilation and the surrounding wall assembly all matter.
Condominium windows and exterior doors may be common elements, corporation-controlled components or subject to an approved exterior specification. Owners should speak with the property manager before accepting a quotation.
The corporation may control colour, frame profile, glass appearance, contractor insurance, elevator reservations, loading access, working hours and protection of common areas. Municipal permit rules and condominium approval are separate matters; one does not replace the other.
Replacement may be appropriate when the complete window is deteriorated, unreliable or no longer suitable for the opening. Common warning signs include:
Rotten, soft, cracked or unstable frames
Water repeatedly entering around the opening
Sashes that no longer open, close or lock safely
Multiple hardware and weatherstripping failures
Fog or moisture trapped between sealed panes
Glass or sash movement inside the frame
Persistent drafts after reasonable maintenance and adjustment
Excessive frame distortion or an out-of-square opening
A configuration that no longer provides suitable ventilation or safe operation
Not every problem requires a complete window. A torn screen, isolated hardware failure, adjustable weatherstripping or one failed sealed glass unit may be repairable when the rest of the system remains sound.
Room-side condensation also does not prove the window has failed. Indoor humidity, outdoor temperature, curtains, blinds and airflow can all affect surface moisture. Fogging permanently trapped between panes is different and usually indicates a failed insulated glass seal. Our window condensation guide explains the distinction.
Imperial offers replacement windows for different room layouts, ventilation requirements and architectural styles.
Casement windows open outward and commonly use compression weatherstripping around the operating sash. They can provide strong ventilation and a relatively unobstructed view. Furniture, walkways and exterior obstructions should be considered before choosing the hinge direction.
Awning windows are hinged at the top and open outward from the bottom. They can suit wider openings, combinations and locations where ventilation is wanted higher on the wall.
Slider windows operate horizontally and can be practical where an outward-opening sash would interfere with a walkway or deck. Single- and double-hung windows operate vertically and may suit a more traditional elevation.
Fixed glass maximizes daylight where ventilation is unnecessary. It can be combined with casements or other operating sections to create balanced front-window configurations. The proportions should be confirmed before ordering because wide mullions or unnecessary operating sashes can reduce visible glass.
Bay, bow and shaped windows require more than product measurements. The quotation should address support, roof or head conditions, insulation, interior seat boards, exterior finishing and any concealed damage. Structural changes may require permits or engineering.
Pane count is only one specification. A meaningful comparison should consider the performance of the complete window, including:
Whole-window U-factor and Energy Rating where supplied
Low-emissivity coating type and placement
Solar heat-gain characteristics
Argon or other specified gas fill
Spacer design at the glass edge
Frame and sash construction
Number and size of operating sections
Weatherstripping and locking compression
Perimeter insulation and air sealing
Installation method and exterior water protection
Double-pane windows can provide good value in many openings. Triple-pane glass can improve interior glass temperatures and comfort during cold weather and may support certain noise-control goals. It also adds cost and weight. Review our double-pane versus triple-pane window comparison before applying one glass package to every room.
Orientation matters as well. A large west-facing window may require different solar-control priorities from a shaded north-facing bedroom. Discuss heat, glare, fading, daylight and winter comfort before choosing a Low-E package.
Some Markham homes are affected by Highway 404, Highway 407, Highway 7, arterial roads, rail activity, aircraft routes or nearby construction. A replacement window can reduce noise, but “soundproof” should never be treated as an absolute promise.
The result can depend on:
Different glass thicknesses within the sealed unit
Laminated glass
The width of the insulated air space
Fixed versus operating sashes
Weatherstripping and sash compression
Perimeter air leakage
Wall, roof, door and ventilation paths outside the window
Identify whether the concern is low-frequency traffic rumble, voices, aircraft or intermittent construction noise. Each source behaves differently. Read our guide to noise-reducing windows for a fuller explanation.
The installation method determines what is removed, what remains and how much of the original opening can be inspected.
A retrofit or insert installation places a complete new window inside a suitable retained perimeter frame. It may preserve existing interior trim and reduce disruption when the original frame is solid, dry, square and appropriately integrated with the wall.
Because the new frame fits inside the old frame, the visible glass area can become smaller. Ask to see the expected frame dimensions before ordering, particularly in narrower openings.
A full-frame installation removes the existing window and perimeter frame. It exposes more of the opening for inspection, insulation and new finishing. It may be preferable when the old frame is rotten, leaking, unstable, badly out of square or buried under previous retrofit layers.
Full-frame replacement may require new interior jambs and casing as well as exterior trim or aluminum capping. The quotation should explain whether painting, nail-hole filling, disposal and repairs are included.
Regardless of method, confirm:
Exactly which old components will be removed
Which frame or trim components will remain
How the new unit will be fastened and supported
How the perimeter will be insulated and air sealed
How water will be managed at the exterior
Which interior and exterior finishes are included
What happens if concealed rot or damage is discovered
A front door influences security, weather resistance, natural light and the appearance of the whole elevation. Imperial supplies and installs entry doors in configurations suited to existing openings and planned renovations.
Steel entry doors offer durable exterior skins, insulated cores and a broad range of panel and glass designs. They can suit traditional or contemporary homes depending on colour, glass, hardware and surrounding trim.
Fiberglass entry doors are available in smooth painted finishes and woodgrain appearances. They can provide the look of stained wood with lower maintenance than many natural-wood systems.
Depending on the existing opening, options may include:
A single door
A door with one or two sidelights
Double doors
A door with a transom
Clear, textured, decorative or privacy glass
Conventional or multi-point locking hardware where available
Coordinated interior and exterior colours
The complete system includes more than the slab. Compare the frame, threshold, weatherstripping, hinges, lock preparation, glass, sill and exterior finishing. A door can be attractive and still perform poorly if the frame is installed out of square or the threshold is not supported and sealed correctly.
Our entry-door replacement guide explains the decisions to make before ordering.
A large patio opening can affect comfort, security and traffic flow between the house and yard. A sliding patio door may need replacement when sealed glass fails, rollers or locks remain unreliable, the frame is deteriorated or drafts continue after reasonable service.
Compare:
Frame construction and reinforcement
Double- or triple-pane glass options
Low-E coating and solar exposure
Operating-panel direction
Lock, handle and optional foot-lock placement
Screen construction
Threshold height and drainage
Interior flooring clearance
Exterior deck, patio and step conditions
A new deck or patio surface installed too close to the sill can complicate drainage. The opening should be inspected before manufacturing so the installation and finishing scope accounts for actual site conditions.
One coordinated project can simplify colour selection, measurements, scheduling and exterior design. It may also reduce repeated disruption when several openings are already near replacement.
Completing everything at once is not always necessary. Active leaks, security concerns, rotten frames and unsafe operation should take priority. Other windows can be phased later when their condition and the budget allow.
Read our guide to replacing windows and doors together before assuming one schedule is best for every home.
Custom products can become difficult or impossible to change after manufacturing. Confirm municipal, heritage and condominium requirements before approving the final order.
The City of Markham’s building-permit process lists replacing windows or doors without changing the size of the rough opening among work that does not require a building permit.
This does not remove other responsibilities. The work must still comply with applicable requirements, and heritage or condominium approval may apply.
Changing a rough opening can affect lintels, headers, framing and load paths. Contact Markham Building Standards before ordering if the project changes the window or door dimensions, creates a new opening or alters structure. Drawings or engineering may be required.
Do not order a larger window based only on an exterior measurement and plan to cut the wall later. Establish the structural and permit scope first.
Markham identifies four Heritage Conservation Districts: Thornhill, Markham Village, Buttonville and Unionville. Individually designated properties may also be protected under the Ontario Heritage Act.
The City’s heritage-permit guidance specifically includes removal and replacement of windows or doors among alterations that can require review.
Heritage staff may consider material, frame proportions, divided-light patterns, trim, colour, opening dimensions and the character of the property. Confirm requirements for the exact address and proposal; do not rely on a contractor’s guess or a neighbouring renovation.
Changing a basement or bedroom window can affect emergency-escape requirements. Markham’s current secondary-suite guide explains that qualifying egress windows must be openable from inside without tools and meet minimum unobstructed-opening criteria.
Requirements depend on the building and proposed use. If the project involves a bedroom, secondary suite, window well or new opening, confirm the current Building Code and permit requirements before manufacturing.
Condominium corporations may control windows, balcony doors and exterior appearance. Ask the property manager:
Whether the component is an owner responsibility or common element
Whether a specific manufacturer, colour or profile is required
Whether the corporation must approve drawings or product data
Which insurance and contractor documents are needed
How elevators, loading areas and corridors must be reserved and protected
Which days and hours work is permitted
Obtain written authorization before placing a non-refundable custom order.
A defined process helps prevent misunderstandings between the initial estimate and final installation.
We inspect the requested openings, discuss drafts, water, condensation, noise, operation and design goals, and note exterior materials, access and visible deterioration.
You compare window styles, glass packages, frame colours, grille patterns, door materials, decorative glass and hardware. Recommendations should reflect each room and elevation rather than a generic package.
The quotation identifies the agreed products, installation method and included finishing. Unclear phrases such as “standard installation” should be defined before the contract is approved.
Final dimensions are taken for manufacturing. Every operating direction, colour, glass selection, grille and door configuration should be reviewed before the order is submitted.
The crew protects the work areas, removes the old products according to the contract, prepares each opening and installs the new units level, plumb and square. Perimeter insulation, sealing and specified trim are completed before normal installation debris is removed.
Open, close and lock each operating product. Inspect glass, screens, hardware, trim, sealant and exterior finishing. Ask about cleaning, maintenance, warranty registration and service requests.
Learn more about professional window and door installation and the complete window replacement process.
An accurate installed price requires measurements and a defined scope. Advertised per-window amounts may omit glass upgrades, colours, removal, full-frame work, trim, disposal or repairs.
Window-pricing factors include:
Width, height and shape
Casement, awning, slider, hung or fixed configuration
Number of operating sashes
Double- or triple-pane glass
Low-E, laminated, obscure or decorative glass
Interior and exterior frame colours
Grilles and hardware
Retrofit or full-frame installation
Jamb extensions, casing and exterior capping
Bay, bow, specialty or structural work
Floor level and access
Concealed deterioration
Door-pricing factors include:
Steel or fiberglass construction
Single, double, sidelight or transom configuration
Standard or custom dimensions
Decorative or privacy glass
Paint or woodgrain finish
Locking and hardware options
Interior and exterior trim
Masonry or structural changes
Disposal and repair work
Compare quotations line by line rather than using the total alone. Our window replacement cost guide explains the major variables without pretending that one price fits every opening.
A strong proposal should make it possible to understand what you are buying. Ask each company:
Which manufacturer and product series are included?
What whole-window performance information is available?
Which glass, coating, gas fill, spacer and colour are specified?
Which windows operate and in what direction?
Is the installation retrofit or full-frame?
What parts of the existing opening will remain?
How will the perimeter be fastened, insulated and sealed?
Which interior and exterior finishes are included?
Are removal and disposal included?
How will concealed rot or water damage be priced and approved?
What product and labour warranties apply?
Who handles service after installation?
Can the company show completed work and verified customer feedback?
Avoid relying on verbal promises, an unexplained “today only” discount or a quotation that lists only the number of openings. Custom windows and doors should have written specifications.
Review Imperial’s warranty information, customer testimonials and project gallery while comparing companies.
Imperial approaches replacement as a complete product-and-installation decision. We help homeowners understand the available options and document the selected scope before custom products are ordered.
Our service includes:
In-home assessment and measurements
Energy-efficient vinyl window options
Steel and fiberglass entry-door systems
Sliding patio doors
Double- and triple-pane glass options
Retrofit and full-frame installation recommendations
Interior and exterior finishing as defined in the quotation
Final operating inspection and warranty information
Residential service throughout Markham and surrounding GTA communities
We do not assume that every home needs triple-pane glass, every old frame must be removed or every condensation concern requires a complete replacement. Recommendations should follow the condition of the opening and the homeowner’s goals.
Imperial provides residential consultations throughout Markham, including:
Unionville
Markham Village
Cornell
Berczy Village
Wismer
Greensborough
Box Grove
Mount Joy
Raymerville
Milliken Mills
Armadale
Thornhill
German Mills
Bayview Fairways
Buttonville
Cachet
Angus Glen
Cathedraltown
Commerce Valley
Markham Centre
If your neighbourhood is not listed, send us the address and project details to confirm service availability.
Imperial also serves nearby York Region communities. Learn about our window and door replacement in Vaughan and window and door replacement in Richmond Hill.
Start planning before a minor issue becomes an emergency. Manufacturing and scheduling vary according to product, colour, glass, customization and season.
Photograph leaks, condensation or wind-related problems when they occur because they may not be visible during a dry, mild consultation. Make a room-by-room list of operational, comfort, privacy and noise priorities.
Before ordering, review the best time to replace windows and check current Ontario window and door rebate information. Incentive programs and eligibility rules can change, so confirm current requirements instead of relying on an older advertisement.
Imperial Windows & Doors proudly provides professional window and door replacement services for homeowners across Markham and surrounding York Region communities. Browse some of our recent replacement window, entry door, and sliding patio door projects completed for modern and traditional homes. Our energy-efficient vinyl windows and exterior doors are designed to improve insulation, curb appeal, security, and long-term performance for residential properties throughout Markham.
The best windows and doors for a Markham home are the products that suit its openings, architecture, performance goals and budget—and are installed according to a complete written scope.
Imperial Windows & Doors can assess your existing units, explain suitable products and installation methods, and provide a quotation for the selected work.
Contact Imperial Windows & Doors to request a free in-home window or door estimate in Markham.
The City of Markham lists replacement windows and doors that do not change the rough-opening size among work that does not require a building permit. Changing an opening, altering structure, creating an egress window or completing work on a protected property may involve additional requirements. Confirm the exact scope with the City before ordering.
They may. Markham has Heritage Conservation Districts in Thornhill, Markham Village, Buttonville and Unionville, as well as individually designated properties. The City’s heritage-permit guidance includes window and door replacement. Obtain address-specific direction before choosing materials, colours, profiles or grille patterns.
Cost depends on dimensions, style, operating sections, glass, colours, installation method, finishing, access and opening condition. An in-home assessment and itemized quotation are more reliable than a generic per-window price.
Triple-pane glass can improve interior surface temperatures and comfort and may support certain noise goals. A well-specified double-pane window may provide better value elsewhere. Compare whole-window performance, room orientation, project goals and price rather than assuming one option is always best.
They can reduce noise when the glass, sash design, seals and installation address the actual source. Laminated glass, different pane thicknesses and fixed sections may help in some situations. Results also depend on walls, doors and other air-leakage paths, so complete soundproofing should not be promised.
Retrofit may be appropriate when the retained frame is dry, solid, square and suitable for reuse. Full-frame replacement provides greater access when the frame is damaged, leaking, unstable or unsuitable. The right method depends on the individual opening and should be stated in writing.
Moisture trapped between panes usually indicates a failed sealed glass unit. Glass replacement may be possible when the sash, frame, hardware and installation remain sound. Complete replacement may be more practical when several parts are deteriorated or the window no longer performs reliably.
Often, yes. Exterior windows and doors may be common elements or subject to corporation standards. Ask the property manager about ownership, approved products, colours, insurance, access and working-hour requirements before signing a custom order.
Potentially, but enlarging an opening can involve structure, a window well, drainage, permits and Building Code requirements. Confirm the required unobstructed opening and complete construction scope before ordering the window.
Timing depends on the number and size of units, retrofit versus full-frame work, access, finishing and concealed conditions. A single straightforward opening may be completed quickly, while a whole-home or structural project can require multiple days. The schedule should be estimated after measurements and scope review.
Yes, on suitable days. Installers should limit how long each opening remains exposed and use products approved for the temperature and conditions. Severe cold, freezing rain, snow, wind or unsafe access may require postponement.
They can be coordinated for consistent colours, glass and scheduling, but they do not have to be replaced together. Prioritize active water entry, security issues, rotten frames and products that cannot be operated safely.
Arrange an in-home assessment and compare a written scope. The quote should identify the products, glass, colours, configurations, installation method, finishing, disposal, repair allowances and warranties—not simply a price and number of openings.
Imperial Windows & Doors provides professionally installed replacement windows, entry doors and patio doors for homeowners across Toronto and the GTA.