{"id":15137,"date":"2026-10-28T14:11:06","date_gmt":"2026-10-28T14:11:06","guid":{"rendered":"https:\/\/alum-fab.com\/?p=15137"},"modified":"2026-10-28T14:16:46","modified_gmt":"2026-10-28T14:16:46","slug":"alumfab-material-fa13d602427b44409345f91b07645004","status":"publish","type":"post","link":"https:\/\/alum-fab.com\/de\/alumfab-material-fa13d602427b44409345f91b07645004\/","title":{"rendered":"Cutting UK Home Running Costs with High-Performance Window Upgrades"},"content":{"rendered":"<article>\n<div>\n<div>\n<figure><img decoding=\"async\" alt=\"Concept British home extension with charcoal aluminium frames and glazed patio doors.\" src=\"https:\/\/alum-fab.com\/wp-content\/uploads\/2026\/10\/alumfab-a0ffa7a560677dd27b1d-2.jpg\"><figcaption>AI-generated concept illustration. It does not depict an Alum-Fab project.<\/figcaption><\/figure>\n<p><strong>A practical \u201cbefore vs after\u201d cost simulation using <\/strong><strong>Uw<\/strong><strong> 1.8 \u2192 0.7\u20130.8 W\/m\u00b2K (plus what really moves the needle)<\/strong><\/p>\n<p>In the UK, \u201crunning costs\u201d is no longer a vague selling point\u2014it\u2019s a design constraint. Homeowners are comparing monthly direct-debit amounts, developers are defending EPC outcomes, and architects are being asked to deliver <strong>comfort and daylight<\/strong> without creating an overheating or maintenance headache. Against that backdrop, upgrading the building envelope\u2014especially windows and doors\u2014often delivers the most reliable, occupant-visible improvements.<\/p>\n<p>For UK homeowners and project teams specifying <strong>aluminium windows<\/strong> and <strong>aluminium doors<\/strong>, the useful question is how thermal performance translates into running costs. With transparent assumptions, this example shows how the Uw improvement you specified (from <strong>Uw<\/strong><strong> \u2248 1.8 W\/m\u00b2K<\/strong> down to <strong>Uw<\/strong><strong> \u2248 0.7\u20130.8 W\/m\u00b2K<\/strong>) translates into realistic annual savings for a \u201ctypical\u201d UK home, and why the <em>total<\/em> savings are usually a combination of <strong>better U-values + better airtightness + better installation interfaces<\/strong>.<\/p>\n<p>For context, the Ofgem Energy Price Cap for the example period (1 January to 31 March 2026) is set at \u00a31,758 per year for a typical dual-fuel household paying by Direct Debit. <br \/>Average cap unit rates over the same period are about <strong>5.93p\/kWh for gas<\/strong> and <strong>27.69p\/kWh for electricity<\/strong> (rates vary by region). <br \/>Ofgem\u2019s \u201ctypical household\u201d consumption values are <strong>2,700 kWh electricity<\/strong> and <strong>11,500 kWh gas per year<\/strong>. <\/p>\n<h3 id=\"section-1\"><strong>1) <\/strong><strong>Uw<\/strong><strong> in plain English: why 1.8 \u2192 0.75 is a big deal<\/strong><\/h3>\n<p>Uw is the <strong>whole-window<\/strong> thermal transmittance (frame + glazing + spacers), expressed in W\/m\u00b2K. Lower is better: it means less heat escaping through each square metre for every degree of temperature difference.<\/p>\n<ul>\n<li><strong>Uw<\/strong><strong> \u2248 1.8 W\/m\u00b2K<\/strong> is typical of older double-glazed units or legacy frames.<\/li>\n<li><strong>Uw<\/strong><strong> \u2248 0.7\u20130.8 W\/m\u00b2K<\/strong> is \u201chigh performance\u201d territory, often associated with triple glazing and well-designed thermally-broken frames.<\/li>\n<\/ul>\n<p>Importantly: Part L guidance has pushed the market toward lower U-values over time, and summary guidance commonly references maximum U-values in the ~1.6 W\/m\u00b2K range for certain replacement window contexts\u2014your target 0.7\u20130.8 is materially better than that baseline expectation. <\/p>\n<p>So yes\u2014on paper, the improvement is dramatic. The key question is how much that translates into <strong>annual bills<\/strong>, which depends on:<\/p>\n<ul>\n<li>window area and proportion of the envelope<\/li>\n<li>UK climate (south vs north; coastal vs inland)<\/li>\n<li>heating system (gas boiler vs heat pump)<\/li>\n<li>internal setpoint and heating schedule<\/li>\n<li>airtightness (often the sleeper variable in real savings)<\/li>\n<\/ul>\n<h2 id=\"section-2\"><strong>2) The simple simulation method used by energy engineers: Degree Days<\/strong><\/h2>\n<p>A fast way to estimate annual heat loss is to use <strong>Heating Degree Days (HDD)<\/strong>. HDD aggregates how cold a location is across a year relative to a base temperature. A widely used UK \u201cstandard year\u201d HDD at a <strong>15.5\u00b0C base<\/strong> is around <strong>2,463<\/strong>. <\/p>\n<p>We\u2019ll use that 2,463 HDD figure to build a clean, reproducible example.<\/p>\n<h3 id=\"section-3\"><strong>Core calculation (annual transmission heat loss through windows)<\/strong><\/h3>\n<p>For a building element:<\/p>\n<ul>\n<li>Annual heat loss (kWh) \u2248 <strong>U \u00d7 A \u00d7 HDD \u00d7 24 \/ 1000<\/strong><\/li>\n<\/ul>\n<p>Where:<\/p>\n<ul>\n<li>U is W\/m\u00b2K<\/li>\n<li>A is area in m\u00b2<\/li>\n<li>HDD is K\u00b7day<\/li>\n<li>24 converts days to hours<\/li>\n<li>\/1000 converts Wh to kWh<\/li>\n<\/ul>\n<p>This is not a full dynamic simulation (it doesn\u2019t model solar gains, wind, or occupant behaviour hour-by-hour), but it\u2019s a very solid \u201cengineering sanity check\u201d that you can adapt quickly.<\/p>\n<figure><img decoding=\"async\" alt=\"Machining an aluminium profile in a production facility.\" src=\"https:\/\/alum-fab.com\/wp-content\/uploads\/2026\/10\/alumfab-f89668a431fe2fafff45-7.jpg\"><figcaption>Image from the existing Alum-Fab website. Machining an aluminium profile in a production facility.<\/figcaption><\/figure>\n<h2 id=\"section-4\"><strong>3) A \u201ctypical UK house\u201d window upgrade simulation (before vs after)<\/strong><\/h2>\n<h3 id=\"section-5\"><strong>3.1 Assumptions (transparent, easy to edit)<\/strong><\/h3>\n<p>Let\u2019s take a common scenario: a <strong>3-bed semi-detached<\/strong> or similar home.<\/p>\n<h3 id=\"section-6\"><strong>House + <\/strong><strong>glazing<\/strong><strong> <\/strong><strong>assumptions<\/strong><\/h3>\n<ul>\n<li>Treated window\/door glazed area: <strong>20 m\u00b2<\/strong> (windows + glazed doors combined)<\/li>\n<li>This is a representative mid-range figure; many homes will be lower or higher depending on age, extensions, and glazing style.<\/li>\n<\/ul>\n<h3 id=\"section-7\"><strong>Thermal<\/strong><strong> performance<\/strong><\/h3>\n<ul>\n<li>Before replacement: <strong>Uw<\/strong><strong> = 1.8 W\/m\u00b2K<\/strong><\/li>\n<li>After replacement: <strong>Uw<\/strong><strong> = 0.75 W\/m\u00b2K<\/strong> (midpoint of your 0.7\u20130.8 target)<\/li>\n<\/ul>\n<h3 id=\"section-8\"><strong>Weather<\/strong><\/h3>\n<ul>\n<li>UK standard HDD (15.5 base): <strong>2,463<\/strong> <\/li>\n<\/ul>\n<h3 id=\"section-9\"><strong>Heating system<\/strong><\/h3>\n<ul>\n<li>Case A: Gas boiler with seasonal efficiency <strong>90%<\/strong> (reasonable for a modern condensing boiler in good condition)<\/li>\n<li>Gas unit rate: <strong>5.93p\/kWh<\/strong> under the cap average <\/li>\n<\/ul>\n<h3 id=\"section-10\"><strong>3.2 Step-by-step: the heat loss reduction from <\/strong><strong>Uw<\/strong><strong> improvement alone<\/strong><\/h3>\n<p><strong>\u0394<\/strong><strong>U = 1.8 \u2212 0.75 = 1.05 W\/m\u00b2K<\/strong><\/p>\n<p>Annual useful heat saved (kWh):<\/p>\n<ul>\n<li>= <strong>\u0394U \u00d7 A \u00d7 HDD \u00d7 24 \/ 1000<\/strong><\/li>\n<li>= 1.05 \u00d7 20 \u00d7 2,463 \u00d7 24 \/ 1000<\/li>\n<li>\u2248 <strong>1,241 kWh\/<\/strong><strong>year<\/strong> of <em>useful<\/em> heat<\/li>\n<\/ul>\n<p>Convert to gas saved (because boiler is not 100% efficient):<\/p>\n<ul>\n<li>Gas saved \u2248 1,241 \/ 0.90 = <strong>1,379 kWh\/<\/strong><strong>year<\/strong><\/li>\n<\/ul>\n<p>Convert to annual cost saving (gas only):<\/p>\n<ul>\n<li>\u00a3 saved \u2248 1,379 kWh \u00d7 \u00a30.0593\/kWh<\/li>\n<li>\u2248 <strong>\u00a382\/<\/strong><strong>year<\/strong><\/li>\n<\/ul>\n<p><strong>Result (<\/strong><strong>Uw<\/strong><strong> effect only): ~\u00a380\/year<\/strong> for this representative case.<\/p>\n<p>That number often surprises people because the Uw upgrade is so large. Two reasons:<\/p>\n<ul>\n<li>Windows are only one component of total heat loss, and<\/li>\n<li>Real-world savings frequently come from <strong>airtightness + interface detailing<\/strong>, not U-value alone.<\/li>\n<\/ul>\n<p>So the next section is where the simulation becomes more realistic.<\/p>\n<h2 id=\"section-11\"><strong>4) The \u201chidden\u201d savings: airtightness and installation interfaces<\/strong><\/h2>\n<p>When homeowners replace old windows, they often gain:<\/p>\n<ul>\n<li>new gaskets and better sash compression<\/li>\n<li>tighter frames with less warp \/ less leakage<\/li>\n<li>improved perimeter sealing (if installed properly)<\/li>\n<\/ul>\n<p>In many UK houses with older windows, <strong>draughts<\/strong> are a major comfort complaint, and eliminating them can reduce heating demand beyond what Uw accounts for.<\/p>\n<h3 id=\"section-12\"><strong>A practical way to include airtightness in the simulation<\/strong><\/h3>\n<p>Ofgem\u2019s typical gas use is <strong>11,500 kWh\/year<\/strong>. <br \/>Not all of that is space heating\u2014some is hot water\/cooking\u2014but for a typical household, space heating is usually the dominant share.<\/p>\n<p>Let\u2019s make a conservative assumption:<\/p>\n<ul>\n<li>Space heating portion: <strong>~75% of gas<\/strong> = ~8,625 kWh\/year (assumption for modelling)<\/li>\n<li>Airtightness improvement from proper replacement: <strong>5\u201310%<\/strong> reduction in space heating demand (range)<\/li>\n<\/ul>\n<p>Then gas saved from airtightness:<\/p>\n<ul>\n<li>Low case: 8,625 \u00d7 5% = <strong>431 kWh <\/strong><strong>gas<\/strong> \u2192 ~\u00a326\/year<\/li>\n<li>High case: 8,625 \u00d7 10% = <strong>863 kWh <\/strong><strong>gas<\/strong> \u2192 ~\u00a351\/year<\/li>\n<\/ul>\n<p>Now add the Uw-based saving (~1,379 kWh gas \u2192 ~\u00a382\/year):<\/p>\n<ul>\n<li><strong>Total <\/strong><strong>saving<\/strong><strong> (<\/strong><strong>Uw<\/strong><strong> + <\/strong><strong>airtightness<\/strong><strong>)<\/strong>:<\/li>\n<li>Conservative: (1,379 + 431) kWh = 1,810 kWh \u2192 <strong>~\u00a3107\/<\/strong><strong>year<\/strong><\/li>\n<li>Stronger case: (1,379 + 863) kWh = 2,242 kWh \u2192 <strong>~\u00a3133\/<\/strong><strong>year<\/strong><\/li>\n<\/ul>\n<h3 id=\"section-13\"><strong>Updated \u201cbefore vs after\u201d (gas) using Ofgem typical consumption<\/strong><\/h3>\n<p>Using Ofgem\u2019s typical <strong>11,500 kWh gas\/year<\/strong> baseline: <\/p>\n<ul>\n<li>Before: 11,500 kWh<\/li>\n<li>After (conservative): 11,500 \u2212 1,810 \u2248 <strong>9,690 kWh<\/strong><\/li>\n<li>After (stronger): 11,500 \u2212 2,242 \u2248 <strong>9,260 kWh<\/strong><\/li>\n<\/ul>\n<p><strong>Cost impact at 5.93p\/kWh (unit rate only):<\/strong><\/p>\n<ul>\n<li>Conservative reduction \u2248 1,810 \u00d7 0.0593 = <strong>~\u00a3107\/<\/strong><strong>year<\/strong><\/li>\n<li>Stronger reduction \u2248 2,242 \u00d7 0.0593 = <strong>~\u00a3133\/<\/strong><strong>year<\/strong> <\/li>\n<\/ul>\n<p>This is still only the heating-energy part. It doesn\u2019t include:<\/p>\n<ul>\n<li>avoided maintenance<\/li>\n<li>reduced condensation \/ mould risk<\/li>\n<li>fewer callouts for stuck doors or failing seals<\/li>\n<li>improved comfort (often the real reason people proceed)<\/li>\n<\/ul>\n<h2 id=\"section-14\"><strong>5) Sensitivity checks: why your results may be higher or lower<\/strong><\/h2>\n<h3 id=\"section-15\"><strong>5.1 Window area (A) changes everything<\/strong><\/h3>\n<p>If the home has larger glazing (extensions, wide sliders, more glass), Uw savings scale directly with area:<\/p>\n<ul>\n<li>15 m\u00b2 glazing area \u2192 ~\u00a360\/year (Uw only)<\/li>\n<li>25 m\u00b2 glazing area \u2192 ~\u00a3100\/year (Uw only)<\/li>\n<li>30 m\u00b2 glazing area \u2192 ~\u00a3120\/year (Uw only)<\/li>\n<\/ul>\n<p>Add airtightness improvements and those totals commonly move into the <strong>\u00a3120\u2013\u00a3200\/year<\/strong> range for many households\u2014still not a \u201cmagic\u201d number, but meaningful over the service life of good windows.<\/p>\n<h3 id=\"section-16\"><strong>5.2 Weather: north vs south<\/strong><\/h3>\n<p>HDD varies across the UK and year-to-year. Using 2,463 HDD is a standardised basis. <br \/>Colder locations (or colder years) push savings up; milder locations push savings down.<\/p>\n<h3 id=\"section-17\"><strong>5.3 Heating system type<\/strong><\/h3>\n<p>If you\u2019re on an <strong>air-source heat pump<\/strong>, you\u2019re buying heat with electricity. Under the cap average, electricity is roughly <strong>27.69p\/kWh<\/strong>. <br \/>But a heat pump might deliver ~3 kWh of heat per 1 kWh electricity (COP ~3, varies).<\/p>\n<p>If the window upgrade saves ~1,241 kWh of useful heat\/year (from the Uw calculation):<\/p>\n<ul>\n<li>Electricity saved \u2248 1,241 \/ 3 = <strong>414 kWh <\/strong><strong>electricity<\/strong><strong>\/<\/strong><strong>year<\/strong><\/li>\n<li>Cost saved \u2248 414 \u00d7 \u00a30.2769 = <strong>~\u00a3115\/<\/strong><strong>year<\/strong><\/li>\n<\/ul>\n<p>So: for heat pumps, high-performance windows can protect running costs (because electricity is expensive per kWh), even though the \u201cfuel maths\u201d differs.<\/p>\n<h2 id=\"section-18\"><strong>6) Why aluminium windows and aluminium doors matter for running costs (not just aesthetics)<\/strong><\/h2>\n<p>This is the part many articles get wrong: they treat \u201caluminium\u201d as purely an architectural choice. In practice, modern <strong>thermally broken aluminium windows<\/strong> and <strong>thermally broken aluminium doors<\/strong> can be a very rational whole-life-cost decision in the UK because they combine:<\/p>\n<p><strong>6.1 Stable geometry = stable seals = stable performance<\/strong><\/p>\n<p>Energy performance is not only about laboratory Uw. It\u2019s about whether the system:<\/p>\n<ul>\n<li>keeps gasket compression consistent through seasons<\/li>\n<li>holds alignment in high-use openings (front doors, patio sliders)<\/li>\n<li>maintains drainage paths and weathering details under wind-driven rain<\/li>\n<\/ul>\n<p>Aluminium\u2019s dimensional stability helps reduce the \u201cperformance drift\u201d that can show up over time in poorly-supported or heavily-cycled openings.<\/p>\n<h3 id=\"section-19\"><strong>6.2 Large, heavy glazing done properly<\/strong><\/h3>\n<p>Homes with big sliders and larger panes often need:<\/p>\n<ul>\n<li>strong frames<\/li>\n<li>robust hardware<\/li>\n<li>precise fabrication tolerances<\/li>\n<\/ul>\n<p>That\u2019s where a capable <strong>aluminium window manufacturer<\/strong> \/ fabrication partner matters, because if fabrication and assembly quality are off by a few millimetres, you can end up with:<\/p>\n<ul>\n<li>roller issues<\/li>\n<li>uneven gasket compression<\/li>\n<li>leaks at thresholds<\/li>\n<li>lock misalignment (security + user frustration)<\/li>\n<\/ul>\n<h3 id=\"section-20\"><strong>6.3 Low maintenance and predictable appearance<\/strong><\/h3>\n<p>Running costs are not only energy. They also include time, repairs, and \u201csmall failures\u201d that become annual expenses.<\/p>\n<p>A well-specified aluminium system with durable finishes typically lowers:<\/p>\n<ul>\n<li>repainting cycles<\/li>\n<li>corrosion touch-ups<\/li>\n<li>warped sash adjustments<\/li>\n<li>premature seal failures<\/li>\n<\/ul>\n<h2 id=\"section-21\"><strong>7) Where \u201caluminium facade systems\u201d enter the running-cost conversation<\/strong><\/h2>\n<p>For refurbishment projects or mixed-use buildings, energy upgrades increasingly go beyond \u201creplace the windows\u201d and into:<\/p>\n<ul>\n<li>fa\u00e7ade over-cladding<\/li>\n<li>rainscreen upgrades<\/li>\n<li>curtain wall improvements<\/li>\n<li>thermal-bridge mitigation at interfaces<\/li>\n<\/ul>\n<p>That\u2019s the territory of <strong>aluminium facade systems \/ aluminium facades \/ aluminium fa\u00e7ade systems<\/strong>\u2014not just skyscrapers, but also mid-rise residential blocks and high-end renovations where owners want:<\/p>\n<ul>\n<li>improved thermal continuity<\/li>\n<li>better moisture management<\/li>\n<li>easier maintenance access<\/li>\n<li>a clean architectural refresh with controlled detailing<\/li>\n<\/ul>\n<p>From a delivery perspective, this is where off-site fabrication, QA, and repeatable assembly become major cost-control tools.<\/p>\n<p>Alum-Fab\u2019s model is positioned specifically around <a href=\"https:\/\/alum-fab.com\/de\/about-us-3\/\">fabrication support for fa\u00e7ade companies<\/a> across windows &amp; doors, stick curtain wall, unitised curtain wall, and rainscreen, with production set up for these divisions. <br \/>For UK projects, this puts predictable production, tolerance management and documentation at the centre of the procurement brief.<\/p>\n<h2 id=\"section-22\"><strong>8)<\/strong><strong> Guidan<\/strong><strong>ce<\/strong><strong>: how to specify for real savings (not brochure savings)<\/strong><\/h2>\n<p>If you want the 0.7\u20130.8 Uw target to translate into actual reduced bills and comfort, these are the levers that matter:<\/p>\n<h3 id=\"section-23\"><strong>8.1 Specify beyond <\/strong><strong>Uw<\/strong><\/h3>\n<p>Ask for:<\/p>\n<ul>\n<li>whole-window Uw (not \u201ccentre pane\u201d only)<\/li>\n<li>warm-edge spacers<\/li>\n<li>suitable solar control where overheating risk exists<\/li>\n<li>airtightness strategy at frame and perimeter<\/li>\n<li>robust threshold details for aluminium doors (especially sliders)<\/li>\n<\/ul>\n<h3 id=\"section-24\"><strong>8.2 Installation is part of the product<\/strong><\/h3>\n<p>Common failure mode in \u201cenergy efficient windows UK\u201d retrofits:<\/p>\n<ul>\n<li>great windows, poor perimeter detailing<\/li>\n<\/ul>\n<p>Look for installers who can explain:<\/p>\n<ul>\n<li>internal air-seal continuity<\/li>\n<li>external weather-seal continuity<\/li>\n<li>how they handle uneven reveals and tolerance gaps<\/li>\n<li>how they avoid thermal bridging at cills\/heads<\/li>\n<\/ul>\n<h3 id=\"section-25\"><strong>8.3 Measure your own house quickly (so your \u201csimulation\u201d becomes yours)<\/strong><\/h3>\n<p>To personalise the calculation, you only need:<\/p>\n<ul>\n<li>Approximate window + glazed door area (m\u00b2)<\/li>\n<li>Your current estimated Uw (or age\/type proxy)<\/li>\n<li>Proposed Uw (0.7\u20130.8)<\/li>\n<li>Local tariff (p\/kWh)<\/li>\n<li>Heating system efficiency\/COP<\/li>\n<\/ul>\n<p>Then use:<\/p>\n<ul>\n<li>Heat saved (kWh) \u2248 (U_old \u2212 U_new) \u00d7 A \u00d7 HDD \u00d7 24 \/ 1000 <\/li>\n<li>Cost saved \u2248 fuel saved \u00d7 unit rate <\/li>\n<\/ul>\n<p>For many homes, a realistic result is:<\/p>\n<ul>\n<li><strong>Uw<\/strong><strong> effect:<\/strong> tens to low hundreds per year depending on glazing area and region<\/li>\n<li><strong>Airtightness + better interfaces:<\/strong> often adds a meaningful extra slice<\/li>\n<\/ul>\n<h2 id=\"section-26\"><strong>9) Bottom line: what \u201cbefore vs after\u201d looks like for a typical UK home<\/strong><\/h2>\n<p>Using your Uw assumption and the example period\u2019s cap-level unit rates:<\/p>\n<ul>\n<li>If a typical home is around <strong>11,500 kWh gas\/year<\/strong> (Ofgem typical), a high-performance window\/door replacement can plausibly reduce gas use by <strong>~1,800\u20132,200 kWh\/year<\/strong> when you include airtightness gains, not just Uw. <\/li>\n<li>That equates to roughly <strong>\u00a3100\u2013\u00a3135\/year<\/strong> at 5.93p\/kWh gas (unit rate only). <\/li>\n<li>For larger glazing areas, colder regions, or homes currently suffering from significant draughts, the range can move higher.<\/li>\n<li>For heat pumps, the energy saving converts differently\u2014but can still land around <strong>~\u00a3100\/year<\/strong> in the worked example because electricity is expensive per kWh. <\/li>\n<\/ul>\n<p>And that\u2019s only the \u201cbill\u201d side. In real decision-making, many homeowners value:<\/p>\n<ul>\n<li>fewer draughts<\/li>\n<li>warmer inner glass temperatures (comfort)<\/li>\n<li>reduced condensation risk<\/li>\n<li>easier operation and fewer repairs\u2014especially on large aluminium doors and sliders<\/li>\n<\/ul>\n<p>For a developer or fa\u00e7ade contractor, the next step is to turn the assumptions into an agreed window and door schedule. Alum-Fab\u2019s <a href=\"https:\/\/alum-fab.com\/de\/offer\/\">aluminium window fabrication and assembly services<\/a> can support that production package; <a href=\"https:\/\/alum-fab.com\/de\/contact\/\">sharing the drawings and performance requirements<\/a> helps identify where fabrication and installation responsibilities sit. The savings calculated above remain an illustration, not a guaranteed outcome of a particular product or supplier.<\/p>\n<\/div>\n<\/div>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>AI-generated concept illustration. It does not depict an Alum-Fab project. A practical \u201cbefore vs after\u201d cost simulation using Uw 1.8<\/p>","protected":false},"author":120,"featured_media":15135,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[110,98,109,111,104],"class_list":["post-15137","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-aluminium-doors","tag-aluminium-facades","tag-aluminium-windows","tag-curtain-walling","tag-energy-efficiency"],"_links":{"self":[{"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/posts\/15137"}],"collection":[{"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/users\/120"}],"replies":[{"embeddable":true,"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/comments?post=15137"}],"version-history":[{"count":1,"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/posts\/15137\/revisions"}],"predecessor-version":[{"id":15138,"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/posts\/15137\/revisions\/15138"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/media\/15135"}],"wp:attachment":[{"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/media?parent=15137"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/categories?post=15137"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alum-fab.com\/de\/wp-json\/wp\/v2\/tags?post=15137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}