[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$flkhsu8xozvaf":3,"$f3qzwigjfrq0bc":188,"$f3rdyqvj4cihnx":197},[4,20,32,43,55,65,76,86,95,103,112,120,129,137,146,154,162,171,180],{"id":5,"kind":6,"locale":7,"slug":8,"path":9,"title":10,"excerpt":11,"seoTitle":12,"seoDescription":13,"category":14,"coverImage":15,"district":16,"lat":16,"lon":16,"publishedAt":17,"updatedAt":18,"readingMinutes":16,"name":16,"isHub":19},5,"guia","en","buying-guide","\u002Fbuying-guide","PVC window buying guide: what to compare","How to ask for a quote, what to check before you sign, which questions to ask and which warranties to request.","PVC window buying guide | JanelaCerta.pt","PVC window buying guide for Portugal: how to ask for a quote, a checklist before hiring, questions for the installer and warranties in writing.","outro","\u002Fimg\u002Fhomem-mesa-sol.jpg",null,1791279000000,1791328855000,true,{"id":21,"kind":6,"locale":7,"slug":22,"path":23,"title":24,"excerpt":25,"seoTitle":26,"seoDescription":27,"category":28,"coverImage":29,"district":16,"lat":16,"lon":16,"publishedAt":30,"updatedAt":18,"readingMinutes":31,"name":16,"isHub":19},4,"problems","\u002Fproblems","Window problems: condensation, cold, noise and leaks","Condensation (also between the panes), draughts, leaks, noise, mould: the most common window problems and what to do.","Window problems: condensation, cold, noise, water","Window problems: condensation (also between double panes), cold and wind, leaks, noise and mould. Where each comes from and what to do, in plain words.","problemas","\u002Fimg\u002Ftermometro-planta.jpg",1791278700000,6,{"id":33,"kind":6,"locale":7,"slug":34,"path":35,"title":36,"excerpt":37,"seoTitle":38,"seoDescription":39,"category":40,"coverImage":41,"district":16,"lat":16,"lon":16,"publishedAt":42,"updatedAt":18,"readingMinutes":16,"name":16,"isHub":19},3,"comparisons","\u002Fcomparisons","Window comparison: PVC, aluminium and glass types","PVC or aluminium? Double or triple glazing? Compare the most common choices in plain words.","Window comparison: PVC, aluminium, glass | JanelaCerta.pt","Window comparison: PVC vs aluminium and double vs triple glazing. What changes in cold, noise, upkeep and price, explained in plain words.","comparacoes","\u002Fimg\u002Fjanela-pvc-jardim.jpg",1791278400000,{"id":44,"kind":6,"locale":7,"slug":45,"path":46,"title":47,"excerpt":48,"seoTitle":49,"seoDescription":50,"category":51,"coverImage":52,"district":16,"lat":16,"lon":16,"publishedAt":53,"updatedAt":18,"readingMinutes":5,"name":16,"isHub":54},13,"questions-for-the-installer","\u002Fbuying-guide\u002Fquestions-for-the-installer","10 questions to ask a window installer","The 10 questions to ask the installer, each with the reason, to see whether the quote is serious.","10 questions to ask a window installer | JanelaCerta.pt","The 10 questions to ask a window installer before you decide: measuring, frame, glass, sealing, warranty and after-job support. With the reasons.","instalacao","\u002Fimg\u002Fgen\u002Finstalador-mede.jpg",1791278100000,false,{"id":56,"kind":6,"locale":7,"slug":57,"path":58,"title":59,"excerpt":60,"seoTitle":61,"seoDescription":62,"category":14,"coverImage":63,"district":16,"lat":16,"lon":16,"publishedAt":64,"updatedAt":18,"readingMinutes":5,"name":16,"isHub":54},12,"warranties-and-certificates","\u002Fbuying-guide\u002Fwarranties-and-certificates","Window warranties and certificates: what to ask for","What should be in writing about warranties and which papers to ask for when buying windows.","Window warranties and certificates | JanelaCerta.pt","Warranties and certificates for PVC windows: what to get in writing, which documents to see (CE marking, technical sheets) and where to check the rules.","\u002Fimg\u002Fpeitoril-pvc.jpg",1791277800000,{"id":66,"kind":6,"locale":7,"slug":67,"path":68,"title":69,"excerpt":70,"seoTitle":71,"seoDescription":72,"category":73,"coverImage":74,"district":16,"lat":16,"lon":16,"publishedAt":75,"updatedAt":18,"readingMinutes":5,"name":16,"isHub":54},11,"how-to-ask-for-a-quote","\u002Fbuying-guide\u002Fhow-to-ask-for-a-quote","How to ask for a PVC window quote: what to send","What to send and what to ask for, so you get clear quotes that you can compare.","How to ask for a PVC window quote | JanelaCerta.pt","How to ask for a PVC window quote: which sizes and photos to send, what to ask the quote to include and which questions to ask so you can compare.","preco","\u002Fimg\u002Fsala-vazia.jpg",1791277500000,{"id":77,"kind":6,"locale":7,"slug":78,"path":79,"title":80,"excerpt":81,"seoTitle":82,"seoDescription":83,"category":51,"coverImage":84,"district":16,"lat":16,"lon":16,"publishedAt":85,"updatedAt":18,"readingMinutes":5,"name":16,"isHub":54},10,"checklist-before-hiring-an-installer","\u002Fbuying-guide\u002Fchecklist-before-hiring","Checklist before hiring a PVC window company","A simple list to check before you sign: company, product, installation, price and warranty.","Checklist before hiring a window company | JanelaCerta.pt","Checklist before hiring a PVC window company: what to check in the quote, the installation, the price and the warranty. Simple and in writing.","\u002Fimg\u002Fobra-instalacao.jpg",1791277200000,{"id":87,"kind":6,"locale":7,"slug":88,"path":89,"title":90,"excerpt":91,"seoTitle":90,"seoDescription":92,"category":93,"coverImage":29,"district":16,"lat":16,"lon":16,"publishedAt":94,"updatedAt":18,"readingMinutes":31,"name":16,"isHub":54},21,"energy-efficiency-windows","\u002Fenergy-efficiency","Window energy efficiency: how to cut heat loss","How a window loses and keeps heat: glass, frame, seals, installation and ventilation. Uw, Ug and Uf in plain words.","How a window loses and keeps heat: glass, frame, seals, installation and ventilation. Uw, Ug and Uf explained in plain words, with no made-up numbers.","eficiencia",1791018000000,{"id":96,"kind":6,"locale":7,"slug":97,"path":98,"title":99,"excerpt":100,"seoTitle":99,"seoDescription":101,"category":73,"coverImage":63,"district":16,"lat":16,"lon":16,"publishedAt":94,"updatedAt":18,"readingMinutes":102,"name":16,"isHub":54},20,"pvc-windows-price","\u002Fpvc-windows-price","PVC window prices: table per m² and per window","Indicative reference values per window and per m², what pushes the price up and how to compare quotes.","PVC window prices per window and per m²: table of reference values (Oct 2026), glass, extras, installation and how to compare quotes without surprises.",7,{"id":104,"kind":6,"locale":7,"slug":105,"path":106,"title":107,"excerpt":108,"seoTitle":109,"seoDescription":110,"category":14,"coverImage":111,"district":16,"lat":16,"lon":16,"publishedAt":94,"updatedAt":18,"readingMinutes":31,"name":16,"isHub":54},19,"window-opening-types","\u002Fpvc-windows\u002Fopening-types","Window opening types: opening, sliding, basculante or tilt-and-turn","Opening or sliding windows? Basculante or tilt-and-turn? See what each type does well and which to choose for each room.","Window opening types: opening, sliding, tilt-and-turn","Window opening types: opening or sliding, basculante or tilt-and-turn. Comparison tables and which one to choose for each room of your home.","\u002Fimg\u002Fpuxador-estore.jpg",{"id":113,"kind":6,"locale":7,"slug":114,"path":115,"title":116,"excerpt":117,"seoTitle":116,"seoDescription":118,"category":93,"coverImage":119,"district":16,"lat":16,"lon":16,"publishedAt":94,"updatedAt":18,"readingMinutes":5,"name":16,"isHub":54},18,"pvc-window-thermal-insulation","\u002Fpvc-windows\u002Fthermal-insulation","Thermal insulation of PVC windows: how to choose","How heat passes through a window and what helps stop it: glass, frame, seals, Uw value and installation.","How thermal insulation works in PVC windows: double glazing, Low-E, Uw value, seals and installation. 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See how installation should be done, common mistakes and how to check.","PVC window installation: common mistakes and checks","How PVC windows should be installed: fixing, sealing, common mistakes and how to check the job was done well. Explained in plain, practical words.",{"id":138,"kind":6,"locale":7,"slug":139,"path":140,"title":141,"excerpt":142,"seoTitle":143,"seoDescription":144,"category":14,"coverImage":145,"district":16,"lat":16,"lon":16,"publishedAt":94,"updatedAt":18,"readingMinutes":31,"name":16,"isHub":54},15,"pvc-profile-classes","\u002Fpvc-windows\u002Fprofile-classes","PVC profile classes: class A, B or C, what it means","Class A is a PVC profile with outer walls of 2.8 mm or more. See what changes between A, B and C and how to confirm it on a quote.","PVC profile classes: what class A, B or C means","Class A PVC: outer walls of 2.8 mm or more (EN 12608). See how it differs from class B and C, and how to confirm the class on a window quote.","\u002Fimg\u002Fperfis-corte.jpg",{"id":147,"kind":6,"locale":7,"slug":148,"path":149,"title":150,"excerpt":151,"seoTitle":152,"seoDescription":153,"category":14,"coverImage":41,"district":16,"lat":16,"lon":16,"publishedAt":94,"updatedAt":18,"readingMinutes":33,"name":16,"isHub":19},14,"pvc-windows","\u002Fpvc-windows","PVC windows: a simple guide to choosing","What PVC windows are, who they suit and where to start. Five short guides to decide well.","PVC windows in Portugal: a simple guide to choosing","A simple guide to PVC windows in Portugal: what they are, who they suit and what to read first on frame, glass, installation, noise, cold and price.",{"id":155,"kind":6,"locale":7,"slug":156,"path":16,"title":157,"excerpt":158,"seoTitle":159,"seoDescription":160,"category":51,"coverImage":52,"district":16,"lat":16,"lon":16,"publishedAt":161,"updatedAt":18,"readingMinutes":5,"name":16,"isHub":54},9,"how-to-measure-windows","How to measure your windows to ask for a quote","You only need a tape measure and five minutes per window. Step by step, in plain words.","How to measure windows to ask for a quote | JanelaCerta.pt","How to measure the window opening to ask for a quote: step by step with a tape measure, what to note and why the installer confirms on site.",1790933400000,{"id":163,"kind":6,"locale":7,"slug":164,"path":165,"title":166,"excerpt":167,"seoTitle":168,"seoDescription":169,"category":28,"coverImage":29,"district":16,"lat":16,"lon":16,"publishedAt":170,"updatedAt":18,"readingMinutes":31,"name":16,"isHub":54},8,"water-on-windows-condensation","\u002Fproblems\u002Fwindow-condensation","Window condensation: on the glass, between the panes and what to do","Water on the inside of the glass is too much humidity meeting cold glass. See where it comes from, what condensation between double panes is and what to do today.","Window condensation: inside, outside, between panes","Window condensation and condensation between double panes: why it appears, the difference between inside and outside, when it is normal and how to fix it.",1790932800000,{"id":102,"kind":6,"locale":7,"slug":172,"path":173,"title":174,"excerpt":175,"seoTitle":176,"seoDescription":177,"category":40,"coverImage":178,"district":16,"lat":16,"lon":16,"publishedAt":179,"updatedAt":18,"readingMinutes":31,"name":16,"isHub":54},"double-or-triple-glazing","\u002Fcomparisons\u002Fdouble-vs-triple-glazing","Double or triple glazing: price, thickness and when it pays off","Triple insulates more, but it weighs and costs more. See what 4\u002F16\u002F4 means, the reference price and which home each one suits.","Double or triple glazing: price, thickness, when it pays","Is triple glazing worth it? Reference price, what 4\u002F16\u002F4 means, double windows or double glazing, Low-E cost and when triple pays off in Portugal.","\u002Fimg\u002Fgen\u002Fvidro-duplo-detalhe.jpg",1790932200000,{"id":31,"kind":6,"locale":7,"slug":181,"path":182,"title":183,"excerpt":184,"seoTitle":185,"seoDescription":186,"category":40,"coverImage":41,"district":16,"lat":16,"lon":16,"publishedAt":187,"updatedAt":18,"readingMinutes":5,"name":16,"isHub":54},"pvc-or-aluminium","\u002Fcomparisons\u002Fpvc-vs-aluminium","PVC vs aluminium: which to choose for your windows?","PVC and aluminium both work. See what changes in cold, upkeep and looks, and how to decide.","PVC vs aluminium windows: which to choose? | JanelaCerta.pt","PVC vs aluminium windows: what changes in cold, noise, cleaning, large openings and near the sea. In plain words, with no invented prices at all.",1790931600000,[189],{"id":190,"kind":191,"locale":7,"slug":192,"path":193,"title":194,"excerpt":195,"seoTitle":196,"seoDescription":195,"category":16,"coverImage":16,"district":16,"lat":16,"lon":16,"publishedAt":94,"updatedAt":18,"readingMinutes":16,"name":16,"isHub":54},24,"pagina","about","\u002Fabout","About JanelaCerta.pt","An independent website that explains windows in plain words. We do not make or install windows.","About the project | JanelaCerta.pt",[198,212],{"id":199,"kind":200,"locale":7,"slug":201,"path":16,"title":202,"excerpt":203,"seoTitle":204,"seoDescription":205,"category":16,"coverImage":206,"district":207,"lat":208,"lon":209,"publishedAt":210,"updatedAt":18,"readingMinutes":16,"name":211,"isHub":54},1,"cidade","pvc-window-installation-peniche","PVC window installation in Peniche","What the Peniche climate asks of your windows: wind, salt, damp and summer sun. Measure the opening and ask for a call back.","PVC window installation in Peniche | JanelaCerta.pt","PVC window installation in Peniche: measure the opening, leave your mobile number and we call you back. Installers in your area send quotes. Free, no commitment.","\u002Fimg\u002Fgen\u002Frua-peniche.jpg","Leiria","39.35","-9.37",1790845200000,"Peniche",{"id":213,"kind":200,"locale":7,"slug":214,"path":16,"title":215,"excerpt":216,"seoTitle":217,"seoDescription":218,"category":16,"coverImage":219,"district":220,"lat":221,"lon":222,"publishedAt":223,"updatedAt":18,"readingMinutes":16,"name":220,"isHub":54},2,"pvc-window-installation-setubal","PVC window installation in Setúbal","What the Setúbal climate asks of your windows: estuary wind, salt, damp, summer heat and old buildings. Ask for a call back.","PVC window installation in Setúbal | JanelaCerta.pt","PVC window installation in Setúbal: measure the opening, leave your mobile number and we call you back. Installers in your area send quotes. Free, no commitment.","\u002Fimg\u002Fgen\u002Fjanela-manha-vista.jpg","Setúbal","38.52","-8.88",1790845500000]