{"product_id":"clear-secondary-glazing-sheet","title":"Clear Secondary Glazing Sheet","description":"\u003ch2 dir=\"ltr\"\u003e3mm Clear Secondary Glazing Sheet Cut To Size\u003c\/h2\u003e\n\u003ch3 dir=\"ltr\"\u003eWhat Is a Secondary Glazing Sheet?\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eA secondary glazing sheet is a second pane fitted inside an existing window, sealing a layer of air between it and the original glass. That trapped air is what does the work: it cuts heat loss through the window, reduces external noise, and stops warm indoor air meeting cold glass, which is what causes condensation. Unlike full double glazing, it doesn't touch the original frame or window, so there's no replacement, no builders and typically no planning permission required, even on listed buildings.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eClear acrylic is the standard material for this because it's optically clear, far lighter than glass, and simple to cut to size at home if a panel ever needs trimming down. It won't yellow or become brittle with UV exposure over time.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eThis 3mm Sheet\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eAt 3mm, this sits in the middle of our secondary glazing range, and is our all-round choice for most household windows, balancing rigidity, insulation and price. It's cut to your exact size, ±1mm tolerance, and arrives with protective film on both faces to keep it scratch-free until you're ready to fit it.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003eWhich Fixing System Suits This Sheet?\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eAt 3mm, this sheet works with most of our fixing systems:\u003c\/p\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetGlaze\u003c\/strong\u003e — suits 2, 3 or 4mm sheet, the standard, most cost-effective choice for vertical windows\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetGlaze Pro\u003c\/strong\u003e — the framed version of MagnetGlaze, also suits 2, 3 or 4mm sheet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetGlaze Extreme\u003c\/strong\u003e — heavy duty magnetic tape, worth choosing over standard MagnetGlaze on a larger or draughtier window\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasyGlaze\u003c\/strong\u003e — not suitable at 3mm, this system is designed specifically for 2mm sheet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClipGlaze\u003c\/strong\u003e — suits 2mm through to 6mm, and is the only system here that works on glass, opening windows and doors, or external fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperGlaze\u003c\/strong\u003e — suits 3mm and 4mm sheet, our rigid, screw-fixed option for larger panes and uPVC or metal frames\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilmGlaze\u003c\/strong\u003e — not applicable, this system uses film instead of a glazing sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003eIf you're not sure which is right for your window, our \u003ca href=\"\/acrylic-secondary-glazing\"\u003eSecondary Glazing Fixing Systems\u003c\/a\u003e page walks through each option by scenario.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cbr\u003eMaterial: CLEAR ACRYLIC | Colour: Clear | Thickness: 3mm\u003c\/p\u003e","brand":"Forge Finishes","offers":[{"title":"2mm","offer_id":67878257328327,"sku":"0X002CTS-1","price":35.84,"currency_code":"GBP","in_stock":true},{"title":"3mm","offer_id":67878257361095,"sku":"0X003CTS-1","price":48.16,"currency_code":"GBP","in_stock":true},{"title":"4mm","offer_id":67878257393863,"sku":"0X004CTS-1","price":63.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0797\/2752\/6087\/files\/3mm_clear_acrylic_1.webp?v=1791677416","url":"https:\/\/www.forge-finishes.com\/products\/clear-secondary-glazing-sheet","provider":"Forge-Finishes","version":"1.0","type":"link"}