{"product_id":"insulfoam-1-eps-tapered-roof-insulation-4-ft-x-4-ft-panels-multiple-tapers","title":"InsulFoam 1# EPS Tapered Roof Insulation 4 ft. x 4 ft. Panels - Multiple Tapers","description":"\u003ch1\u003eInsulFoam 1# EPS Tapered Roof Insulation 4 ft. x 4 ft. Panels - Multiple Tapers\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eInsulfoam 1# EPS Tapered is 4 ft. x 4 ft. closed-cell expanded polystyrene roof insulation with a nominal 1.0 lb\/ft3 density, cut in a range of taper profiles to create positive slope on low-slope roofs. This line spans tapers from 0 in. up to 10 in. across A and C profiles. Choose the taper series and panel thickness that match your slope plan.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed-cell EPS:\u003c\/strong\u003e Superior closed-cell, lightweight expanded polystyrene insulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeets ASTM C578:\u003c\/strong\u003e Meets or exceeds ASTM C578, the standard for rigid cellular polystyrene thermal insulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable R-value:\u003c\/strong\u003e Provides long-term, stable R-value with no thermal drift over its service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-layer installs:\u003c\/strong\u003e Can be installed in a single layer for thicknesses up to 40 in., with no complicated filler panel systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.0 lb\/ft3 density:\u003c\/strong\u003e InsulFoam I has a nominal density of 1.0 lb\/ft3.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-effective slope:\u003c\/strong\u003e Significantly more cost-effective than extruded polystyrene, perlite, and isocyanurate tapered systems.\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\u003eInsulfoam\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 panel, 4 ft. x 4 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\u003eInsulfoam 1# EPS Tapered (InsulRoof Taper)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct category\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCommercial Roofing \/ Commercial Insulation \/ EPS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable colors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23 taper\/thickness variants in 4 ft. x 4 ft. panels, from (A1) 0 in.-0.5 in. through (C10) 9 in.-10 in., including (A2) 0.5-1 in., (A4) 1.5-2 in., (C2) 1-2 in., (C4) 3-4 in., (C6) 5-6 in., (C8) 7-8 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 ft. x 4 ft. panels; thickness ranges vary by taper (e.g., C6: 5 in. to 6 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExpanded polystyrene (EPS), closed-cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage per unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 sq. ft. per 4 ft. x 4 ft. panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDensity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNominal 1.0 lb\/ft3 (InsulFoam I)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMeets or exceeds ASTM C578\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax thickness single layer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 40 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePositive-slope roof insulation for new construction and re-roofing; addresses ponded water\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 4 ft. x 4 ft. panel covers 16 sq. ft. of roof area. Divide the roof area by 16 sq. ft. per panel, then lay out the taper pattern so the low edge drains toward the designated drainage points.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eWorks under approved low-slope roof membranes and assemblies; it is cut from the same EPS as Insulfoam's flat InsulFoam products, so flat boards can supplement the tapered field. Membrane, adhesives, and cover board are sold separately; confirm the taper layout with your roofing contractor.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What sizes are available?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The line includes 23 variants, all 4 ft. x 4 ft., spanning tapers from 0 in. to 0.5 in. (A1) up to 9 in. to 10 in. (C10), including both A-series quarter-inch steps and C-series 1-in. steps.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How much does one panel cover?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A 4 ft. x 4 ft. panel covers 16 sq. ft.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What density is this?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A nominal 1.0 lb\/ft3 (InsulFoam I).\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Can it be installed in one layer?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, InsulRoof Taper can be installed in a single layer for thicknesses up to 40 in. with no filler panel systems.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Will the R-value drop over time?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, its thermal properties remain stable over the entire service life with no thermal drift.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is it suitable for re-roofing?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, it is designed for both new construction and re-roofing where positive slope is desired or ponded water is a concern.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eSelect the taper series based on the slope per foot you need: A-series tapers step in roughly half-inch increments while C-series step in full inches, all on 4 ft. panels. Lay out crickets and slopes so each panel run drains to scuppers or drains, and keep the thin edge at the drainage line. EPS panels are lightweight and easy to field-cut, but protect them from prolonged sun exposure before the membrane goes on.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eKeep EPS away from open flame and hot work; polystyrene insulation is combustible and should be covered by the roof assembly promptly.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder Insulfoam 1# EPS Tapered panels in your taper profile to build positive slope into your roof.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Insulfoam","offers":[{"title":"(C6) 5\" to 6\", 4' x 4' \/ PC","offer_id":53524004438383,"sku":"INSTIC6","price":38.5,"currency_code":"USD","in_stock":true},{"title":"(C7) 6\" to 7\", 4' x 4' \/ PC","offer_id":53524004471151,"sku":"INSTIC7","price":45.0,"currency_code":"USD","in_stock":true},{"title":"(C2) 1.25\" to 2.25\", 4' x 4' \/ EA","offer_id":53524004503919,"sku":"INSEPSC2","price":15.95,"currency_code":"USD","in_stock":true},{"title":"(C1) 0\" to 1\", 4' x 4' \/ BD","offer_id":53524004536687,"sku":"INSTC1","price":82.5,"currency_code":"USD","in_stock":true},{"title":"(A1) 0\" to 0.5\", 4' x 4' \/ PC","offer_id":53524004569455,"sku":"INSTIA1","price":3.85,"currency_code":"USD","in_stock":true},{"title":"(A2) 0.5\" to 1\", 4' x 4' \/ PC","offer_id":53524004602223,"sku":"INSTIA2","price":6.15,"currency_code":"USD","in_stock":true},{"title":"(A3) 1\" to 1.5\", 4' x 4' \/ PC","offer_id":53524004634991,"sku":"INSTIA3","price":9.95,"currency_code":"USD","in_stock":true},{"title":"(A4) 1.5\" to 2\", 4' x 4' \/ PC","offer_id":53524004667759,"sku":"INSTIA4","price":13.95,"currency_code":"USD","in_stock":true},{"title":"(A5) 2\" to 2.5\", 4' x 4' \/ SQ (price per square)","offer_id":53524004700527,"sku":"INSTIA5","price":3.26,"currency_code":"USD","in_stock":true},{"title":"(C2) 1\" to 2\", 4' x 4' \/ BD","offer_id":53524004733295,"sku":"INSTIC2","price":98.5,"currency_code":"USD","in_stock":true},{"title":"(C4) 3\" to 4\", 4' x 4' \/ SQ (price per square)","offer_id":53524004766063,"sku":"INSTIC4","price":4.88,"currency_code":"USD","in_stock":true},{"title":"(C5) 4\" to 5\", 4' x 4' \/ PC","offer_id":53524004798831,"sku":"INSTIC5","price":40.5,"currency_code":"USD","in_stock":true},{"title":"(C8) 7\" to 8\", 4' x 4' \/ PC","offer_id":53524004831599,"sku":"INSTIC8","price":59.0,"currency_code":"USD","in_stock":true},{"title":"(C9) 8\" to 9\", 4' x 4' \/ PC","offer_id":53524004864367,"sku":"INSTIC9","price":111.0,"currency_code":"USD","in_stock":true},{"title":"(C10) 9\" to 10\", 4' x 4' \/ SQ (price per square)","offer_id":53524004897135,"sku":"INSTIC10","price":21.12,"currency_code":"USD","in_stock":true},{"title":"(A6) 2.5\" to 3\", 4' x 4' \/ PC","offer_id":53524004929903,"sku":"INSTIA6","price":23.0,"currency_code":"USD","in_stock":true},{"title":"(A7) 3\" to 3.5\", 4' x 4' \/ PC","offer_id":53524004962671,"sku":"INSTIA7","price":26.75,"currency_code":"USD","in_stock":true},{"title":"(C1) 0.25\" to 1.25\", 4' x 4' \/ EA","offer_id":53524004995439,"sku":"INSEPSC1","price":9.5,"currency_code":"USD","in_stock":true},{"title":"(E2) 2.25\" to 4.25\", 4' x 4' \/ EA","offer_id":53524005028207,"sku":"INSEPSE2","price":32.25,"currency_code":"USD","in_stock":true},{"title":"(C3) 2\" to 3\", 4' x 4' \/ BD","offer_id":53524005060975,"sku":"INSTIC3","price":102.75,"currency_code":"USD","in_stock":true},{"title":"(A8) 3.5\" to 4\", 4' x 4' \/ PC","offer_id":53524005093743,"sku":"INSTIA8","price":25.82,"currency_code":"USD","in_stock":true},{"title":"(A9) 4\" to 4.5\", 4' x 4' \/ PC","offer_id":53524005126511,"sku":"INSTIA9","price":31.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/ProductImage_CarlisleConstructionMaterials_INSTIC6.jpg?v=1790270283","url":"https:\/\/superarbor.io\/products\/insulfoam-1-eps-tapered-roof-insulation-4-ft-x-4-ft-panels-multiple-tapers","provider":"Super Arbor","version":"1.0","type":"link"}