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The awning's enemy is wind, not rain: an awning left out in a gust becomes a sail bolted to your house (insurers see the claims every summer), which is why the wind sensor on electric models is the one extra worth paying for: it retracts the thing while you're at work. Cassettes protect the rolled fabric from weather (semi = underside exposed: full = sealed box: the fabric lasts years longer). Fixings must hit brick/block, not render or insulation: cavity and external-wall-insulation walls need specialist brackets: the survey is not a formality.
What The Awning Cost Calculator Works Out
- Estimated cost: the width in metres multiplied by the per-metre fitted rate for the type, with a 28% saving for a DIY-fit kit. Budget manual open-roll units run about GBP 150 a metre, semi-cassette manuals GBP 250-320, full-cassette electrics GBP 380-460, and the sensor, heater and light tier GBP 500-plus, so a 4m patio awning lands anywhere from GBP 600 to GBP 2,200.
- Spec that matters: projection at your actual sun angle decides whether the table is shaded at 6pm; solution-dyed acrylic holds colour for a decade where polyester fades in 3-4 summers; and ordering electric now beats a GBP 250-400 motor retrofit later.
- The wall and wind reality: an extended awning is a sail on a lever arm putting hundreds of kilos through four brackets, so fixings must reach brick or block through any render, cavity or external insulation. The fitter who does not ask what the wall is made of is the wrong fitter.
- Projection (advanced): how far the awning comes out, typically 2.5m to 3.5m for domestic units. The shaded area card multiplies it by the width and shows the cost per square metre of shade, which is the fair way to compare a wide shallow awning with a narrow deep one.
- Electrical supply or outdoor socket (advanced): an electric awning needs a fused spur or weatherproof socket near the cassette, GBP 80-200 from an electrician if one is not already there, and more if the cable has to be chased through the wall.
- Wind sensor or remote add-on (advanced): a vibration or anemometer wind sensor costs GBP 100-200 as an add-on where it is not already in the package, and it is the one extra worth endorsing without reservation because it retracts the fabric while you are out.
- Fabric life and replacement cost (advanced): acrylic fabric lasts about 10 years in a cassette and less when left exposed; polyester 4-5. A fabric-only re-cover typically costs about a third of the awning's price and is the refresh path most owners do not know exists.
- Fabric replacements and cost over the period (advanced): how many re-covers fall inside the years you keep the awning (the original fabric counts as the first life), and the total of awning, extras and every re-cover over that period.
- Cost per summer (advanced): the whole-period cost divided by the years kept, which is what each season of shade actually costs against a parasol or a fixed pergola.