Warehouse Blowout Sale: Buy Now to Save 50%

Free Shipping on Qualifying Hardwood Decking & Siding Orders Over $5,000

Free Shipping on Synthetic Decking Orders over $5,000 when You Add Fasteners or Railing

Free Shipping on Flooring Orders over $5,000

1 2

TimberTech®

SKU: ATT-CC.MWhi.PC0404I

TimberTech® Classic Composite Island Post Cap

TimberTech® Classic Composite Island Post Cap

$20.62 USD

$20.62 USD

Call to Order: 1-877-232-3915

Shipping calculated at checkout.

Color White Black Matte White Matte Espresso Matte Black

Size 4″ x 4″ 5.5″ x 5.5″

Product variants

Quantity

Add the perfect finishing touch to your railing system with the TimberTech® Classic Composite Island Post Cap. Designed to complement TimberTech Classic Composite railing, this post cap features a clean, understated profile that enhances the overall look of your deck without overpowering it.

Constructed from durable composite materials, it offers long lasting resistance to moisture, fading, and everyday wear making it ideal for outdoor environments. The Island style design provides a smooth, slightly beveled top that sheds water effectively while maintaining a timeless appearance.

Easy to install and built to last, this post cap is the ideal way to protect your posts while completing your railing system with a polished, cohesive finish.

Shipping Information

Please call 1.877.232.3915, e-mail or message us online. We will call you to verify your order and to make payment arrangements. We also have several other trucking companies that work with us at a 72% discount which we pass onto you. Orders can be shipped direct to your home or jobsite. We can also hold orders at your local freight terminal for customer pickup. Small orders are shipped via UPS. We also ship to European and other foreign countries on container load basis. We ship anywhere in the world...please phone or email if you have shipping questions.
Check out our complete terms of sale for more info >

View full details

Free Shipping
Buy now to save on shipping! Receive FREE SHIPPING on select orders.
Free Shipping Terms
Bulk Buy Specials
Buy in bulk to save on your next order!
Bulk Buy Specials

Promotions, new products and sales. Directly to your inbox.

{"id":7055057911850,"title":"TimberTech® Classic Composite Island Post Cap","handle":"timbertech-classic-composite-island-post-cap","description":"\u003cp\u003eAdd the perfect finishing touch to your railing system with the TimberTech® Classic Composite Island Post Cap. Designed to complement TimberTech Classic Composite railing, this post cap features a clean, understated profile that enhances the overall look of your deck without overpowering it.\u003c\/p\u003e\n\u003cp\u003eConstructed from durable composite materials, it offers long lasting resistance to moisture, fading, and everyday wear making it ideal for outdoor environments. The Island style design provides a smooth, slightly beveled top that sheds water effectively while maintaining a timeless appearance.\u003c\/p\u003e\n\u003cp\u003eEasy to install and built to last, this post cap is the ideal way to protect your posts while completing your railing system with a polished, cohesive finish.\u003c\/p\u003e","published_at":"2024-01-19T16:00:36-05:00","created_at":"2024-01-18T09:53:31-05:00","vendor":"TimberTech®","type":"Railing","tags":["Accessories","Composite","Composite Railing","Exterior","Installation Location_Exterior","Post Caps","Railing","Synthetic Railing","TimberTech®","TimberTech® Classic Composite Rail"],"price":1987,"price_min":1987,"price_max":3543,"available":true,"price_varies":true,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":40930954477610,"title":"White \/ 4″ x 4″","option1":"White","option2":"4″ x 4″","option3":null,"sku":"ATT-CC.Whit.PC0404I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064067276842,"product_id":7055057911850,"position":2,"created_at":"2024-01-19T09:10:20-05:00","updated_at":"2025-07-18T10:49:54-04:00","alt":null,"width":1143,"height":571,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194","variant_ids":[40930954477610,40930954510378,40930954608682,40930954641450]},"available":false,"name":"TimberTech® Classic Composite Island Post Cap - White \/ 4″ x 4″","public_title":"White \/ 4″ x 4″","options":["White","4″ x 4″"],"price":1987,"weight":304,"compare_at_price":null,"inventory_management":"shopify","barcode":"683531032001","featured_media":{"alt":null,"id":23517648158762,"position":2,"preview_image":{"aspect_ratio":2.002,"height":571,"width":1143,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954510378,"title":"White \/ 5.5″ x 5.5″","option1":"White","option2":"5.5″ x 5.5″","option3":null,"sku":"ATT-CC.Whit.PC05.505.5I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064067276842,"product_id":7055057911850,"position":2,"created_at":"2024-01-19T09:10:20-05:00","updated_at":"2025-07-18T10:49:54-04:00","alt":null,"width":1143,"height":571,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194","variant_ids":[40930954477610,40930954510378,40930954608682,40930954641450]},"available":false,"name":"TimberTech® Classic Composite Island Post Cap - White \/ 5.5″ x 5.5″","public_title":"White \/ 5.5″ x 5.5″","options":["White","5.5″ x 5.5″"],"price":2949,"weight":830,"compare_at_price":null,"inventory_management":"shopify","barcode":"683531020657","featured_media":{"alt":null,"id":23517648158762,"position":2,"preview_image":{"aspect_ratio":2.002,"height":571,"width":1143,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954543146,"title":"Black \/ 4″ x 4″","option1":"Black","option2":"4″ x 4″","option3":null,"sku":"ATT-CC.Blac.PC0404I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064083988522,"product_id":7055057911850,"position":3,"created_at":"2024-01-19T09:16:03-05:00","updated_at":"2025-07-18T10:49:54-04:00","alt":null,"width":4836,"height":2700,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-4x4.jpg?v=1752850194","variant_ids":[40930954543146,40930954739754]},"available":false,"name":"TimberTech® Classic Composite Island Post Cap - Black \/ 4″ x 4″","public_title":"Black \/ 4″ x 4″","options":["Black","4″ x 4″"],"price":2179,"weight":304,"compare_at_price":null,"inventory_management":"shopify","barcode":"683531032018","featured_media":{"alt":null,"id":23517664935978,"position":3,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-4x4.jpg?v=1752850194"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954575914,"title":"Black \/ 5.5″ x 5.5″","option1":"Black","option2":"5.5″ x 5.5″","option3":null,"sku":"ATT-CC.Blac.PC05.505.5I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064084381738,"product_id":7055057911850,"position":4,"created_at":"2024-01-19T09:16:15-05:00","updated_at":"2025-07-18T10:49:55-04:00","alt":null,"width":4836,"height":2700,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-5.5x5.5.jpg?v=1752850195","variant_ids":[40930954575914,40930954772522]},"available":false,"name":"TimberTech® Classic Composite Island Post Cap - Black \/ 5.5″ x 5.5″","public_title":"Black \/ 5.5″ x 5.5″","options":["Black","5.5″ x 5.5″"],"price":3543,"weight":830,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":null,"id":23517665329194,"position":4,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-5.5x5.5.jpg?v=1752850195"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954608682,"title":"Matte White \/ 4″ x 4″","option1":"Matte White","option2":"4″ x 4″","option3":null,"sku":"ATT-CC.MWhi.PC0404I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064067276842,"product_id":7055057911850,"position":2,"created_at":"2024-01-19T09:10:20-05:00","updated_at":"2025-07-18T10:49:54-04:00","alt":null,"width":1143,"height":571,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194","variant_ids":[40930954477610,40930954510378,40930954608682,40930954641450]},"available":true,"name":"TimberTech® Classic Composite Island Post Cap - Matte White \/ 4″ x 4″","public_title":"Matte White \/ 4″ x 4″","options":["Matte White","4″ x 4″"],"price":2062,"weight":304,"compare_at_price":null,"inventory_management":null,"barcode":"683531044752","featured_media":{"alt":null,"id":23517648158762,"position":2,"preview_image":{"aspect_ratio":2.002,"height":571,"width":1143,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954641450,"title":"Matte White \/ 5.5″ x 5.5″","option1":"Matte White","option2":"5.5″ x 5.5″","option3":null,"sku":"ATT-CC.MWhi.PC05.505.5I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064067276842,"product_id":7055057911850,"position":2,"created_at":"2024-01-19T09:10:20-05:00","updated_at":"2025-07-18T10:49:54-04:00","alt":null,"width":1143,"height":571,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194","variant_ids":[40930954477610,40930954510378,40930954608682,40930954641450]},"available":true,"name":"TimberTech® Classic Composite Island Post Cap - Matte White \/ 5.5″ x 5.5″","public_title":"Matte White \/ 5.5″ x 5.5″","options":["Matte White","5.5″ x 5.5″"],"price":2949,"weight":830,"compare_at_price":null,"inventory_management":null,"barcode":"683531044813","featured_media":{"alt":null,"id":23517648158762,"position":2,"preview_image":{"aspect_ratio":2.002,"height":571,"width":1143,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954674218,"title":"Matte Espresso \/ 4″ x 4″","option1":"Matte Espresso","option2":"4″ x 4″","option3":null,"sku":"ATT-CC.MEsp.PC0404I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064086642730,"product_id":7055057911850,"position":5,"created_at":"2024-01-19T09:16:52-05:00","updated_at":"2025-07-18T10:49:55-04:00","alt":null,"width":4836,"height":2700,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-4x4.jpg?v=1752850195","variant_ids":[40930954674218]},"available":true,"name":"TimberTech® Classic Composite Island Post Cap - Matte Espresso \/ 4″ x 4″","public_title":"Matte Espresso \/ 4″ x 4″","options":["Matte Espresso","4″ x 4″"],"price":2356,"weight":304,"compare_at_price":null,"inventory_management":null,"barcode":"683531044769","featured_media":{"alt":null,"id":23517667590186,"position":5,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-4x4.jpg?v=1752850195"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954706986,"title":"Matte Espresso \/ 5.5″ x 5.5″","option1":"Matte Espresso","option2":"5.5″ x 5.5″","option3":null,"sku":"ATT-CC.MEsp.PC05.505.5I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064087199786,"product_id":7055057911850,"position":6,"created_at":"2024-01-19T09:17:00-05:00","updated_at":"2025-07-18T10:49:55-04:00","alt":null,"width":4836,"height":2700,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-5.5x5.5.jpg?v=1752850195","variant_ids":[40930954706986]},"available":true,"name":"TimberTech® Classic Composite Island Post Cap - Matte Espresso \/ 5.5″ x 5.5″","public_title":"Matte Espresso \/ 5.5″ x 5.5″","options":["Matte Espresso","5.5″ x 5.5″"],"price":3543,"weight":830,"compare_at_price":null,"inventory_management":null,"barcode":null,"featured_media":{"alt":null,"id":23517668147242,"position":6,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-5.5x5.5.jpg?v=1752850195"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954739754,"title":"Matte Black \/ 4″ x 4″","option1":"Matte Black","option2":"4″ x 4″","option3":null,"sku":"ATT-CC.MBla.PC0404I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064083988522,"product_id":7055057911850,"position":3,"created_at":"2024-01-19T09:16:03-05:00","updated_at":"2025-07-18T10:49:54-04:00","alt":null,"width":4836,"height":2700,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-4x4.jpg?v=1752850194","variant_ids":[40930954543146,40930954739754]},"available":true,"name":"TimberTech® Classic Composite Island Post Cap - Matte Black \/ 4″ x 4″","public_title":"Matte Black \/ 4″ x 4″","options":["Matte Black","4″ x 4″"],"price":2356,"weight":304,"compare_at_price":null,"inventory_management":null,"barcode":"683531047388","featured_media":{"alt":null,"id":23517664935978,"position":3,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-4x4.jpg?v=1752850194"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":40930954772522,"title":"Matte Black \/ 5.5″ x 5.5″","option1":"Matte Black","option2":"5.5″ x 5.5″","option3":null,"sku":"ATT-CC.MBla.PC05.505.5I","requires_shipping":true,"taxable":true,"featured_image":{"id":31064084381738,"product_id":7055057911850,"position":4,"created_at":"2024-01-19T09:16:15-05:00","updated_at":"2025-07-18T10:49:55-04:00","alt":null,"width":4836,"height":2700,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-5.5x5.5.jpg?v=1752850195","variant_ids":[40930954575914,40930954772522]},"available":true,"name":"TimberTech® Classic Composite Island Post Cap - Matte Black \/ 5.5″ x 5.5″","public_title":"Matte Black \/ 5.5″ x 5.5″","options":["Matte Black","5.5″ x 5.5″"],"price":3543,"weight":830,"compare_at_price":null,"inventory_management":null,"barcode":"683531047418","featured_media":{"alt":null,"id":23517665329194,"position":4,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-5.5x5.5.jpg?v=1752850195"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-beauty.jpg?v=1752850194","\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194","\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-4x4.jpg?v=1752850194","\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-5.5x5.5.jpg?v=1752850195","\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-4x4.jpg?v=1752850195","\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-5.5x5.5.jpg?v=1752850195"],"featured_image":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-beauty.jpg?v=1752850194","options":["Color","Size"],"media":[{"alt":null,"id":23517646159914,"position":1,"preview_image":{"aspect_ratio":0.667,"height":864,"width":576,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-beauty.jpg?v=1752850194"},"aspect_ratio":0.667,"height":864,"media_type":"image","src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-beauty.jpg?v=1752850194","width":576},{"alt":null,"id":23517648158762,"position":2,"preview_image":{"aspect_ratio":2.002,"height":571,"width":1143,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194"},"aspect_ratio":2.002,"height":571,"media_type":"image","src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-white-5.5x5.5.jpg?v=1752850194","width":1143},{"alt":null,"id":23517664935978,"position":3,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-4x4.jpg?v=1752850194"},"aspect_ratio":1.791,"height":2700,"media_type":"image","src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-4x4.jpg?v=1752850194","width":4836},{"alt":null,"id":23517665329194,"position":4,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-5.5x5.5.jpg?v=1752850195"},"aspect_ratio":1.791,"height":2700,"media_type":"image","src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-black-5.5x5.5.jpg?v=1752850195","width":4836},{"alt":null,"id":23517667590186,"position":5,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-4x4.jpg?v=1752850195"},"aspect_ratio":1.791,"height":2700,"media_type":"image","src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-4x4.jpg?v=1752850195","width":4836},{"alt":null,"id":23517668147242,"position":6,"preview_image":{"aspect_ratio":1.791,"height":2700,"width":4836,"src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-5.5x5.5.jpg?v=1752850195"},"aspect_ratio":1.791,"height":2700,"media_type":"image","src":"\/\/buy.advantagelumber.com\/cdn\/shop\/files\/island-matte-espresso-5.5x5.5.jpg?v=1752850195","width":4836}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eAdd the perfect finishing touch to your railing system with the TimberTech® Classic Composite Island Post Cap. Designed to complement TimberTech Classic Composite railing, this post cap features a clean, understated profile that enhances the overall look of your deck without overpowering it.\u003c\/p\u003e\n\u003cp\u003eConstructed from durable composite materials, it offers long lasting resistance to moisture, fading, and everyday wear making it ideal for outdoor environments. The Island style design provides a smooth, slightly beveled top that sheds water effectively while maintaining a timeless appearance.\u003c\/p\u003e\n\u003cp\u003eEasy to install and built to last, this post cap is the ideal way to protect your posts while completing your railing system with a polished, cohesive finish.\u003c\/p\u003e"}