https://guava-grasshopper-kj3r.squarespace.com/guides-resources daily 0.75 2026-09-09 https://guava-grasshopper-kj3r.squarespace.com/guides-resources/Blog Post Title One-3zaa9-zlxng-67tfc-433pz monthly 0.5 2026-09-09 https://images.squarespace-cdn.com/content/v1/69e754ef7c0a402691057d58/1f41804f-3c83-4958-9e4b-6b2b636fb4a5/1280x960.webp Guides & Resources - Rehabbed windows, will they last? Independent air-leakage testing was completed before rehabilitation, immediately after the work, and again approximately 10 years later. The rehabilitated windows continued to perform beyond the former A2 air-tightness requirement. Before repair: 4.02 m³/h/m = FAILED After rehab: 1.21 m³/h/m = BEYOND CODE 10 years later: 1.60 m³/h/m = STILL BEYOND CODE https://images.squarespace-cdn.com/content/v1/69e754ef7c0a402691057d58/23c37a44-d32a-4336-ac7d-d0f8535adc80/images-3.jpg Guides & Resources - Rehabbed windows, will they last? - Independent testing at ΔP = 75 Pa. Former A2 air-leakage criterion: < 1.65 m³/h/m. Data from the Trempe-Patenaude report. Before repair: 4.02 m³/h/m = FAILED After rehab: 1.27 m³/h/m = BEYOND CODE 10 years later: 1.38 m³/h/m = STILL BEYOND CODE https://images.squarespace-cdn.com/content/v1/69e754ef7c0a402691057d58/e341e189-e84d-4ad1-966e-8284653ebb9e/13906799_1.jpg Guides & Resources - Rehabbed windows, will they last? - 10 years later: all three buildings still exceeded the performance requirement. Before repair: 4.68 m³/h/m = FAILED After rehab: 1.43 m³/h/m = BEYOND CODE 10 years later: 1.54 m³/h/m = STILL BEYOND CODE https://guava-grasshopper-kj3r.squarespace.com/guides-resources/blog-post-title-two-t5my5-k4xmd-67jzh-rszzg monthly 0.5 2026-09-09 https://images.squarespace-cdn.com/content/v1/69e754ef7c0a402691057d58/6c333d2a-39fb-4b06-944d-1c03bb531683/Screenshot+2026-09-09+at+12.22.44%E2%80%AFPM.png Guides & Resources - The 5 worst reasons to replace windows That’s about a 100 year payback, ...if the sealed glass lasts that long - but it won’t. Notes: Paybacks are shorter in low-rise buildings(Installed cost low-rise windows normally lower than for high-rise windows) Paybacks are longer in gas heated buildings. 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Replace Later. Many window & door problems can be corrected without full replacement. Fenestra saves owners money by replacing hardware and weatherstripping, returning windows and doors back to (or beyond) original air & water tightness - Lower cost Typically, repair options are a small fraction of the cost of full replacement. - Less disruption Compared to full replacement, Fenestra's repairs are faster and less invasive. And your blinds will still fit. - Extend service life Fenestra customers can often delay full replacement several decades.