Where to Buy DIY Replacement Windows Online

Upgrading your home’s windows can make a dramatic difference in energy efficiency, noise reduction, and even curb appeal. But replacing all the windows in your home can also come with a hefty price tag if you hire a professional installer. For homeowners with the skills and time, installing replacement windows yourself can save thousands of dollars in labor costs. DIY replacement windows have become increasingly popular in recent years thanks to big box stores and online retailers offering quality products directly to consumers.

This detailed guide will cover everything you need to know about buying DIY replacement windows for your home improvement project, including:

Choosing the Right DIY Replacement Windows

When you decide to tackle a window replacement project yourself, choosing the right windows is the critical first step. Here are the key factors to consider:

Types of Replacement Windows

Double Hung Windows – These traditional style windows have an upper and lower sash that slide up and down in the frame. Double hungs are popular in many homes but can be prone to air leaks if not properly sealed.
Casement Windows – Hinged on the side and cranking open outward, casements provide full ventilation when needed. These windows are energy efficient but can have a lower visible glass area.
Sliding Windows – As the name suggests, slides have sashes that glide horizontally to open. They offer good ventilation but are usually most suitable for areas like basements or bathrooms.
Awning Windows – Hinged at the top and tipping open outward, awnings allow rain to run off easily. Great above other windows or over doorways. Limited ventilation capabilities.
Fixed/Picture Windows – Picture windows are just fixed panes of glass designed to allow light in and views out without opening. Better energy efficiency than single hung or sliding.
Bay and Bow Windows – Multi-paned assemblies that project outward from the home for expanded views. Complex installation but can add space and appeal.
Garden Windows – Mini versions of a bay window with integrated bench seating and shelves. Made for kitchens, baths, and other rooms.
Specialty Shape Windows – From circles to triangles and everything in between, specialty shapes allow unique designs. Costly but on-trend for modern homes.

Window Materials

Vinyl – Affordable and low maintenance, vinyl is a top choice for replacement windows. Resists weathering and rotting with good insulation properties. Lacks aesthetic appeal for some homeowners.
Wood – Beautiful and classic, wood windows come in many styles. Must be properly treated and painted to prevent rotting or water damage. Higher upfront cost but great longevity.
Aluminum – Lightweight yet very durable, aluminum offers sleek lines and multiple color choices. Energy efficiency can be lower if not properly insulated.
Fiberglass – Glass-reinforced resin makes fiberglass windows strong and resistant to rotting, rusting, and warping. More expensive but superior performance.
Composite – Blends materials like vinyl, wood, and fiberglass to get desired qualities of each. Combination windows appeal to many homeowners.

Efficiency Ratings

U-factor – Rates how well the window prevents heat from escaping. The lower the U-factor, the better it insulates. Look for U-factors of 0.30 or below for cold climates.
Solar Heat Gain Coefficient (SHGC) – Measures solar radiation blocked. Lower SHGC is better in warm climates, while higher SHGC works for cold climates.
Visible Transmittance – Indicates how much light comes through the glass. Higher VT is desirable for more daylighting, lower for glare reduction.
Air Leakage Rating – Shows how much outside air infiltrates around the window. Look for the lowest air leakage rating possible.
Condensation Resistance – Key in humid climates, this indicates the window’s ability to resist condensation buildup. Higher numbers are best.
Energy Star – The EPA’s Energy Star label signifies meeting strict efficiency standards. While not required, Energy Star windows provide proven performance.

Additional Features

Low-E Glass – Specialized coatings on glass boost efficiency by limiting UV and infrared light while letting visible light through. Recommended for almost all climates.
Gas Fills – Argon or krypton gas stuffed between window panes insulates better than just air. Upgrade for maximized efficiency.
Impact Glass – For hurricane-prone coastal areas, impact glass prevents shattering in high winds and flying debris.
Grilles – Internal grilles between glass panes or external grilles recreate a divided light look popular on old homes. Grilles don’t affect performance.
Tinting – Reduces glare and adds privacy. Good choices are light tints that minimize outdoor views while allowing light transmission.
Noise Reduction – Using advanced glass technology, some windows can dampen outside noise if sound insulation is a priority.
Smart/Connected Features – Higher end options allow control and monitoring of windows via smartphone, voice activation, and more for convenience and security.

Once you determine the right types of replacement windows for your home, square footage, and climate, it’s essential to buy quality products that will live up to their performance claims. Going with lesser quality windows to save money almost always ends up being a false economy. Investing in top efficiency ratings, durable materials, and advanced features makes sense for long-lasting value and functionality.

Where to Shop Online for DIY Replacement Windows

In the past, shopping for windows meant going to local home improvement stores and getting whatever brand or style they carried in stock. Today’s online window suppliers give homeowners many more choices without ever leaving home. Here are the best online sources for buying DIY replacement windows:

Online Retailers Specializing in Windows

Pella – A top brand for professionally installed windows, Pella now sells directly to DIYers through their online store with free shipping. Known for high-quality craftsmanship and innovative features. Wide selection of wood, vinyl, and aluminum replacement windows.
Milgard – Focusing on vinyl and fiberglass windows, Milgard is a highly regarded national brand with excellent warranties. Order exactly what you need directly from their site. Local experts provide support.
Marvin – For those seeking exceptional wood windows, Marvin builds heirloom-quality products made to last. Strength and prestige define this luxury window maker. Modern and traditional styles. Customizable options.
Anderson – From innovative wood composite windows to sleek contemporary styles, Anderson performs beautifully. Known for excellent quality and energy efficiency. DIY-friendly designs.
Harvey – Popular maker of vinyl replacement windows, Harvey has factory direct sales online. Affordable prices with solid performance and warranties. Many purchasing choices.
Sunrise Windows – For good value vinyl and composite windows, Sunrise has online cart sales that make upgrading easy. Custom design your own windows with streamlined ordering.
Ply Gem – Offering vinyl, wood, and aluminum replacement windows under brands like Great Lakes, Ply Gem is a large manufacturer with competitive pricing.
Window Nation – As a factory direct company selling online only, Window Nation focuses on value and owner-friendly installation. Features, styles, and savings appeal to DIYers.
ProVia – Known for exceptional fiberglass and steel windows, ProVia positions itself as the premium choice for the discerning renovator. Designs emulate old-world wood windows updated with the latest materials.
Hurd – For those wanting American-made windows, Hurd provides quality wood windows built in the USA. Traditional styles crafted from Douglas Fir and Pine popularize this brand.

Big Box Stores

Home Depot – Of course the home improvement superstore carries DIY replacement windows from brands like Jeld-Wen and Ply Gem. Order online for in-store pickup or delivery. Installation services available.
Lowe’s – Lowe’s also stocks major vinyl, wood, composite, and aluminum window brands. Shop online and get free in-store assembly plus delivery options. Can order exact sizes needed.
Menards – This Midwest home improvement chain sells value-priced windows in many styles online. Pick up at your local Menards or opt for direct delivery. Known for low prices.
ACE Hardware – For neighborhood hardware store shopping online, ACE allows buying windows and pickup at your nearby store. Limited selection but good for basic vinyl replacement windows.
Walmart – Even Walmart sells windows online today including brands like Larson and Excel. Low prices appeal to DIYers on a budget. Opt for free delivery or in-store pickup. Limited style selection.
Amazon – Along with practically everything else, Amazon stocks some vinyl and composite window brands to choose from. Pay close attention to warranties and specifications. Reviews can be helpful.

The online shopping experience allows comparing numerous window brands and models side-by-side. Take advantage of this to understand the pros and cons, prices, efficiency ratings, visual appeal, and warranties of different products. Buying directly from the manufacturer typically includes custom sizing at no added cost. For additional assistance, many major brands have special DIY sections on their sites along with virtual advisors and chat support.

How to Measure for DIY Replacement Windows

Once you’ve picked out the perfect new windows for your home, getting the measurements right is crucial for a smooth installation. Avoid potential delays or problems down the line by carefully following these steps:

Prepare Window Openings

Remove any curtains, blinds, or window treatments to access the entire window area.
Clear any items blocking the windows and move all furnishings back several feet.
Take down existing storm windows or old window screens.
Remove molding and trim around the window carefully if possible to expose the rough opening area.

Measure Window Width

Measure across the top, middle, and bottom of the window opening. Write down all three widths.
Use the narrowest width for the new window size to allow room to shim the window into the opening.

Measure Window Height

Measure the height on the left, right, and center sides from top to bottom.
Use the shortest height measurement for the window height.

Measure Window Depth

Measure the window frame thickness top to bottom in several spots.
New window depth should be comparable to get a good fit.

Check for Square

Compare diagonal measurements from corner to corner.
If measurements are different, the opening is not square. Make a note to shim accordingly during installation.
Consider ordering an adjustable sash window if severely out of square.

Include Type, Rough Opening Size, and Additional Details

Note window type (double hung, casement, etc) and any special product info for each window.
Provide the exact rough opening width and height. Most manufacturers add 1/4 to 1/2-inch for fitting into openings.
Specify interior or exterior painted, grill type, glass tints, hardware finish, and any other options.

Following the manufacturer’s recommendations for measurement and ordering ensures your new windows will work for your existing window openings. Avoid the hassle of returns and exchanges by double checking all of your numbers. Most companies provide forms to fill out with each window’s specifications to streamline the ordering process.

How to Install DIY Replacement Windows

When your new energy efficient windows arrive, it’s go time! Follow these steps to remove the old windows and get your shiny new replacements installed like a pro:

Prep the Work Area

Protect floors and furnishings with drop cloths and plastic sheeting around the work space.
Have all tools ready and easily accessible – tape measure, shims, level, utility knife, pry bar, drill, screwdriver.
Clear obstacle-free access to the exterior and sufficient room for old window disposal.

Remove Old Window Sashes and Trim

Score paint or varnish seal between window frame and wall with a utility knife. Remove any nails, screws, or clips.
Pry frame bottom away from sill until freed. Support frame weight as you remove.
Remove both sashes then remove any remaining frame pieces. Finally pry off interior window stop molding.
On outside, remove exterior trim pieces like brick molding using pry bar. Set pieces aside to reuse or replace later.

Prep New Window for Installation

Unpack new window and confirm proper product and accurate sizes.
Assemble window frame components if required following manufacturer’s instructions.
Pre-drill any holes for screws per recommendations to prevent cracking or splitting.
Caulk perimeter of window frame and any joins for optimal weather sealing.

Insert New Window into Opening

Set window into rough opening atop backer rod in the sill. Center within opening.
Level and plumb the window frame on all sides.
Shim any gaps between the frame and opening using tapered cedar shims if needed for secure fitting.
Drill pilot holes and nail or screw window frame into wall studs per manufacturer specs.
Check window operation and caulk exterior perimeter for weatherproofing.

Complete Exterior Trim and Finish Inside

On exterior, install new brick molding or reuse old after cutting to fit if still in good shape.
Seal gaps with high quality caulk and install cap flashing above window.
Inside, reinstall interior stop molding or new custom window jamb extensions for a flawless look.
Insulate between window and wall with minimally expanding spray foam. Caulk for airtight seal.
Hang new blinds or curtains, then enjoy the fresh feel and view from your upgraded window!

Some key tips to remember when tackling window installation for the first time – work slowly and carefully, follow all manufacturer instructions, don’t scrimp on caulk or flashing, and ask for help lifting large windows into place. Taking your time results in secure new windows that function smoothly for years of practical use and visual beauty.

FAQs About DIY Replacement Window Shopping

DIY window replacement comes with many questions for homeowners doing the project on their own for the first time. Here are helpful answers to some frequently asked questions:

Where is the cheapest place to buy replacement windows for DIY installation?

Cheapest doesn’t always mean best value. Focus first on quality and the features you need rather than absolute lowest price. With that said, big box stores like Home Depot and Lowe’s along with online retailers like Window Nation and Excel typically offer the lowest prices on vinyl and composite windows.

Should I buy replacement windows online or in store?

Thanks to online shopping, today you can research brands thoroughly ahead of time and order windows tailored to your exact specifications without leaving home. This makes online purchasing ideal. Some even offer virtual measurement services. You can still opt for in-store pickup if you prefer.

How much do replacement windows cost?

For basic vinyl double hung windows, expect to pay around $200 to $400 per window. More complex products like wood casements or bay windows run from $500 to over $1,500 depending on features. Location, size, accessories, brand, and type determine cost.

What thickness replacement windows are best?

Look for window frame thickness between 3 1/4 inches to 3 1/2 inches. This provides good insulation, durability, and structure for secure installation. occurring to eliminate condensation with warmer exterior temperatures.

Should I buy replacement windows with built-in insulation?

Today’s window technology makes built-in insulation largely unnecessary. Instead, focus on multi-chamber vinyl or composite frames, energy efficient glazing, and high-performance gas fills for better insulation. Add supplemental insulation around the window opening during installation if needed.

What questions should I ask before buying replacement windows?

What is the total cost including all options, taxes, and shipping?
Will installation voids the warranty?
Can I see product samples and documentation of efficiency ratings?
What is your return policy and timeline?
Do you offer installation services or support if I need help?
Can windows be delivered on my schedule?

Doing online research before purchasing is always wise. Don’t hesitate to contact customer service to get all of your questions answered before you buy. Plan ahead to ensure your DIY window installation goes smoothly from start to finish.

Conclusion

Upgrading the windows in your home is one of the best investments you can make when it comes to improving appearance, comfort, energy savings, and resale value. But you don’t have to break the bank to gain those benefits. Following this guide to buy quality yet affordable DIY replacement windows online, taking accurate measurements, and properly installing your new windows helps ensure your project is a success.

The hardest part is choosing among the many styles, brands, and sources for replacement windows available today. Take the time to carefully evaluate what will work best for your home. Invest in the most energy efficiency and features you can afford. And don’t be afraid to take on the installation yourself – with proper planning and care it can be a manageable and rewarding DIY project. Just do your homework, get the right tools and materials, and enjoy your new views and your cost savings when the job is done.