{"id":244370,"date":"2026-08-31T21:49:03","date_gmt":"2026-09-01T02:49:03","guid":{"rendered":"https:\/\/changementdethermos.com\/?p=244370"},"modified":"2026-08-31T21:49:03","modified_gmt":"2026-09-01T02:49:03","slug":"preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos","status":"publish","type":"post","link":"https:\/\/changementdethermos.com\/en\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/","title":{"rendered":"Preparing your windows for a Quebec winter: the complete guide to replacing double-glazed windows"},"content":{"rendered":"
\n

<\/p>\n

\n
\ud83c\udf42 Winter Preparation Guide<\/div>\n

Preparing your windows for a Quebec winter: the complete guide to replacing double-glazed windows<\/h1>\n

Block heat loss before the cold weather arrives.<\/p>\n<\/div>\n

<\/p>\n

\n

Autumn is the ideal time to prepare your home for winter. Up to 25% of a home's heat escapes through the windows<\/strong>and a faulty thermos can single-handedly increase your heating bill by several hundred dollars.<\/p>\n<\/div>\n

In the Montreal and Laval region, winters put your windows to the test. The temperature difference between the heated interior at 21\u00b0C and the exterior, which drops below -25\u00b0C, creates enormous pressure on the sealed glazing of your windows.<\/p>\n

Here's everything you need to know to prepare your windows before the first major cold snaps \u2014 and why replacing your thermos is the most cost-effective solution.<\/p>\n

<\/p>\n

\n

\u26a1 Quick response<\/p>\n

Replacing a double-glazed window involves changing only the sealed pane of glass in your window.<\/strong>while preserving the existing frame. It's a quick intervention (often less than an hour per window), costs a fraction of the price of a complete window, and restores your home's energy efficiency before winter.<\/p>\n<\/div>\n

<\/p>\n

\n

\ud83d\udcca The impact of windows on your heating<\/p>\n

\n

25%<\/p>\n

Heat from a house escapes through the windows<\/p>\n<\/div>\n

\n

50%<\/p>\n

A significant portion of a Quebec household's energy budget goes towards heating.<\/p>\n<\/div>\n

\n

-25\u00b0C<\/p>\n

temperatures that your thermoses have to face each winter<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\n
\u2744\ufe0f Point #1<\/div>\n

Why do thermoses break down during the Quebec winter?<\/h2>\n

A thermos, also called sealed glazing<\/strong> Or sealed unit<\/strong>It consists of two (or three) glass panels separated by a space filled with argon gas. This gas, denser than air, considerably slows down heat transfer.<\/p>\n

In Quebec, this system is subjected to extreme stress. When it's -25\u00b0C outside and 21\u00b0C inside, the outer pane contracts while the inner pane expands. This movement is repeated season after season, eventually cracks the seal<\/strong> which keeps the argon gas in place.<\/p>\n

Once the seal is compromised, the argon gas escapes and moisture seeps in. Your window then loses most of its insulating capacity \u2014 and becomes a veritable thermal sieve.<\/p>\n

\n

\u26a0\ufe0f Average lifespan of a thermos:<\/p>\n

In the Quebec climate, sealed glazing has a typical lifespan of 15 to 20 years old<\/strong>If your windows are this old, it is very likely that several of the double-glazed units have already started to deteriorate, even without obvious visible signs.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\n
\ud83d\udcb8 Point #2<\/div>\n

How much does a faulty thermos cost on your heating bill?<\/h2>\n

Heating accounts for about half of a Quebec household's electricity consumption. When your windows let in heat, your heating system compensates by running longer and more frequently.<\/p>\n

\n

With defective thermos<\/p>\n

Heat that escapes continuously<\/p>\n

Electric baseboard heaters or heat pump running constantly. Feeling cold near the windows. Thermostat turned up to compensate.<\/p>\n

Maximum winter bill<\/p>\n<\/div>\n

\n

With new thermoses<\/p>\n

Heat trapped inside<\/p>\n

Heating system that reaches the set temperature and then shuts off. Uniform comfort throughout. Stable thermostat.<\/p>\n

Savings from the first month<\/p>\n<\/div>\n

Over a full heating season (generally from October to April in Quebec), the difference can represent several hundred dollars<\/strong> depending on the size of your house and the number of windows affected.<\/p>\n<\/div>\n

<\/p>\n

\n
\ud83d\udd27 Point #3<\/div>\n

Should the entire window be replaced, or just the insulated glass unit?<\/h2>\n

This is the most frequently asked question \u2014 and the answer often makes the difference between an expense of a few hundred dollars and a bill of several thousand.<\/p>\n

\n

\u2705 Replacing the thermos is sufficient if:<\/p>\n

\u2022 The frame (PVC, aluminum or wood) is solid, straight and free from rot<\/p>\n

\u2022 The opening mechanisms are functioning normally<\/p>\n

\u2022 The problem is condensation, frost, or heat loss through the glazing.<\/p>\n

\u2022 The frame's weatherstripping is in good condition<\/p>\n<\/div>\n

\n

\u274c Full window required if:<\/p>\n

\u2022 The frame is rotten, deformed, or cracked<\/p>\n

\u2022 Air is seeping in between the wall and the frame (structural problem)<\/p>\n

\u2022 The mechanisms are broken and irreparable<\/p>\n

\u2022 You want to change the size or style of the opening<\/p>\n<\/div>\n

In the vast majority of cases we encounter in Montreal and Laval, only the glazing is the problem<\/strong>The frame still has 10 to 20 years of useful life ahead of it.<\/p>\n<\/div>\n

<\/p>\n

\n
\n
\ud83d\udccb Checklist<\/div>\n

Inspect your windows before winter<\/h2>\n<\/div>\n
\n

01<\/span> Pass your hand near each window: can you feel the cold passing through?<\/p>\n

02<\/span> Look for condensation or deposits<\/strong> between the two panes of glass.<\/p>\n

03<\/span> Check if certain parts are colder<\/strong> than the others.<\/p>\n

04<\/span> Test them draft excluder<\/strong> around the frame with a sheet of paper.<\/p>\n

05<\/span> Compare your Hydro bill<\/strong> from last winter to that of two years ago.<\/p>\n

06<\/span> Note the age of your windows: beyond 15 years<\/strong>An inspection is necessary.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\u2753 Frequently Asked Questions<\/h2>\n
\n

Can a thermos be replaced in winter?<\/p>\n

Yes. Replacing a double-glazed window is done primarily from the inside and usually takes less than an hour per window. The opening is brief, and the impact on your home's temperature is minimal. That said, having the work done in the fall prevents you from experiencing heat loss throughout the cold season.<\/p>\n<\/div>\n

\n

How long does a new thermos last?<\/p>\n

A quality sealed unit installed in the Quebec climate typically lasts between 15 and 20 years. At Changement de Thermos Inc., our double-glazed units are covered by a warranty of up to 10 years.<\/p>\n<\/div>\n

\n

What is argon gas and what is Low-E film?<\/p>\n

Argon gas, an inert gas denser than air, is injected between the panes of glass to slow down heat transfer. Low-E (low-emissivity) film is a microscopic coating applied to the glass that reflects heat: in winter, it reflects heat from your heating system back inside; in summer, it blocks the sun's heat.<\/p>\n<\/div>\n

\n

How much does it cost to replace a thermos unit compared to a complete window?<\/p>\n

Replacing a double-glazed unit is a fraction of the cost of a new window, since you only pay for the sealed glazing and its installation\u2014not for the frame, hardware, interior finishing, or additional labor. Because every situation is different, a free estimate will give you an accurate price.<\/p>\n<\/div>\n

\n

Is replacing a thermos messy?<\/p>\n

No. Unlike a complete window replacement\u2014which requires removing the moldings, tearing out the frame, and redoing the insulation\u2014replacing a double-glazed unit is limited to removing the glazing beads and the glass. No demolition, no construction dust, no paint or drywall touch-ups.<\/p>\n<\/div>\n

<\/p>\n

\n

\ud83c\udf42<\/p>\n

Autumn: the ideal time window<\/p>\n

Acting before the onset of severe cold allows you to enjoy a comfortable home from the first frost, avoid a full season of heat loss, and benefit from shorter installation times than in the midst of a winter emergency.<\/p>\n<\/div>\n

<\/p>\n

\n

\u2705 The benefits of a new thermos in winter<\/h2>\n
\n

\u2713<\/span>Reduced heating bill<\/strong> from the first month<\/p>\n

\u2713<\/span>End of cold zones<\/strong> near the windows<\/p>\n

\u2713<\/span>More than neither fog nor frost<\/strong> between the panes of glass<\/p>\n

\u2713<\/span>Heating system less in demand<\/strong><\/p>\n

\u2713<\/span>Benefits also in summer against the heat<\/strong><\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\n
\n

\ud83c\udfc6<\/p>\n

Over 20 years of experience<\/p>\n<\/div>\n

\n

\ud83d\udee1\ufe0f<\/p>\n

Warranty up to 10 years<\/p>\n<\/div>\n

\n

\u26a1<\/p>\n

Fast service in Montreal<\/p>\n<\/div>\n

\n

\ud83d\udcb0<\/p>\n

Free submission<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

\n
\ud83c\udf1f Free quote<\/div>\n

Prepare your windows before the cold weather arrives.<\/p>\n

Our experts inspect your thermoses and identify those that need to be replaced as a priority.
\nFast service in Montreal and Laval.<\/strong><\/p>\n

\n

\ud83d\udcde Call us<\/p>\n

450-634-9525<\/a><\/p>\n<\/div>\n

Free submission \u2192<\/a><\/p>\n<\/div>\n

<\/p>\n

\n

Thermos Inc. Change<\/p>\n

Over 20 years of experience<\/p>\n

Warranty up to 10 years<\/p>\n

Fast service in Montreal and Laval<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

\ud83c\udf42 Guide Pr\u00e9paration Hiver Pr\u00e9parer ses fen\u00eatres pour l’hiver qu\u00e9b\u00e9cois : le guide complet du remplacement de thermos Bloquez les pertes de chaleur avant les grands froids L’automne est la p\u00e9riode id\u00e9ale pour pr\u00e9parer votre maison \u00e0 l’hiver. Jusqu’\u00e0 25% de la chaleur d’une maison s’\u00e9chappe par les fen\u00eatres, et un thermos d\u00e9fectueux peut \u00e0 […]<\/p>","protected":false},"author":4,"featured_media":244329,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-244370","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conseils-blogue"],"yoast_head":"\nPr\u00e9parer ses fen\u00eatres pour l'hiver qu\u00e9b\u00e9cois : le guide complet du remplacement de thermos - Changement de thermos inc.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/changementdethermos.com\/en\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pr\u00e9parer ses fen\u00eatres pour l'hiver qu\u00e9b\u00e9cois : le guide complet du remplacement de thermos - Changement de thermos inc.\" \/>\n<meta property=\"og:description\" content=\"\ud83c\udf42 Guide Pr\u00e9paration Hiver Pr\u00e9parer ses fen\u00eatres pour l’hiver qu\u00e9b\u00e9cois : le guide complet du remplacement de thermos Bloquez les pertes de chaleur avant les grands froids L’automne est la p\u00e9riode id\u00e9ale pour pr\u00e9parer votre maison \u00e0 l’hiver. Jusqu’\u00e0 25% de la chaleur d’une maison s’\u00e9chappe par les fen\u00eatres, et un thermos d\u00e9fectueux peut \u00e0 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/changementdethermos.com\/en\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/\" \/>\n<meta property=\"og:site_name\" content=\"Changement de thermos inc.\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-01T02:49:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/changementdethermos.com\/wp-content\/uploads\/2026\/01\/unnamed2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"559\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Rayel Expert\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rayel Expert\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/changementdethermos.com\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/changementdethermos.com\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/\"},\"author\":{\"name\":\"Rayel Expert\",\"@id\":\"https:\/\/changementdethermos.com\/#\/schema\/person\/a4f97a4274f57811b5d3ad766f18cccb\"},\"headline\":\"Pr\u00e9parer ses fen\u00eatres pour l’hiver qu\u00e9b\u00e9cois : le guide complet du remplacement de thermos\",\"datePublished\":\"2026-09-01T02:49:03+00:00\",\"dateModified\":\"2026-09-01T02:49:03+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/changementdethermos.com\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/\"},\"wordCount\":1334,\"publisher\":{\"@id\":\"https:\/\/changementdethermos.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/changementdethermos.com\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/changementdethermos.com\/wp-content\/uploads\/2026\/01\/unnamed2.jpg\",\"articleSection\":[\"Conseils pour les vitres thermos\"],\"inLanguage\":\"en-CA\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/changementdethermos.com\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/\",\"url\":\"https:\/\/changementdethermos.com\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/\",\"name\":\"Pr\u00e9parer ses fen\u00eatres pour l'hiver qu\u00e9b\u00e9cois : le guide complet du remplacement de thermos - 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Jusqu’\u00e0 25% de la chaleur d’une maison s’\u00e9chappe par les fen\u00eatres, et un thermos d\u00e9fectueux peut \u00e0 […]","og_url":"https:\/\/changementdethermos.com\/en\/2026\/08\/31\/preparer-ses-fenetres-pour-lhiver-quebecois-le-guide-complet-du-remplacement-de-thermos\/","og_site_name":"Changement de thermos inc.","article_published_time":"2026-09-01T02:49:03+00:00","og_image":[{"width":1024,"height":559,"url":"https:\/\/changementdethermos.com\/wp-content\/uploads\/2026\/01\/unnamed2.jpg","type":"image\/jpeg"}],"author":"Rayel Expert","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Rayel Expert","Est. reading time":"7 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