{"product_id":"mastic-corner-starter-insert-white-1-4-in-x-20-ft","title":"Mastic Corner Starter \u0026 Insert, White, 1\/4 in. x 20 ft.","description":"\u003ch1\u003eMastic Corner Starter \u0026amp; Insert, White, 1\/4 in. x 20 ft.\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eThe Mastic Corner Starter \u0026amp; Insert in White is a 1\/4 in. x 20 ft. siding accessory that provides a starting and receiving edge for corner trim installations. Sold as a single piece. It pairs with Mastic vinyl siding and corner trim components on exterior wall projects.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner application:\u003c\/strong\u003e Serves as a starter and insert for siding corner installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 ft. length:\u003c\/strong\u003e Long 20 ft. piece minimizes joints on typical wall corners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4 in. profile:\u003c\/strong\u003e Slim 1\/4 in. profile suits lineal corner assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhite finish:\u003c\/strong\u003e White finish coordinates with common siding and trim colors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle piece:\u003c\/strong\u003e Sold per piece for easy job-sized ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eSpecifications Table:\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSell unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 piece, 1\/4 in. x 20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMastic Lineals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable colors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4 in. x 20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4 in. x 20 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCorner starter and insert for siding corner trim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch2\u003eCoverage \u0026amp; How Much You Need:\u003c\/h2\u003e\u003cp\u003eEach 20 ft. piece covers one standard wall corner run up to 20 linear feet; order one piece per corner, or two for taller two-story runs, allowing for cuts.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eIntended for use with Mastic siding and corner trim assemblies; pairing with corresponding Mastic lineal corner components, sold separately, is recommended.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What is included?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One White 1\/4 in. x 20 ft. corner starter and insert piece.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How many pieces per corner?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One 20 ft. piece covers most single-story corner runs; taller walls may require a second piece with a joint.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How is it installed?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Fasten it plumb at the corner, then install the mating trim or insert over it per the siding installation instructions.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is it available in other colors?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This page lists the White color only.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is this a trim piece or a full corner post?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is a starter and insert component for corner assemblies, not a full corner post.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eCheck the corner for plumb before fastening the starter and insert, since any bow in the corner shows up along the entire trim line. Keep fasteners centered in slots where present so the assembly can move with temperature swings. Order enough single-piece lengths to avoid joints at visible corners when the wall height allows.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eUse appropriate ladders and fall protection when working at elevation, and follow the manufacturer's installation instructions.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder the Mastic Corner Starter \u0026amp; Insert in White, 1\/4 in. x 20 ft., for clean, plumb siding corners.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Mastic","offers":[{"title":"Default Title","offer_id":53523962495343,"sku":"ALCQRWH","price":49.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/ALCQRWH_0.png?v=1790269911","url":"https:\/\/superarbor.io\/products\/mastic-corner-starter-insert-white-1-4-in-x-20-ft","provider":"Super Arbor","version":"1.0","type":"link"}