Therma-Tru Basic Composite Adjustable Sill Cap 3'0

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Your Price: $54.95

Retail Price:$55.00

Your Savings:$0.05(0%)

Part Number: RPISL30AKIT-

Availability: Ships Next Business Day

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Customer Reviews

Therma-Tru Basic Composite Adjustable Sill Cap 3'0

This sill cap is designed with durability and functionality in mind. Its all-composite substrate is moisture and insect-resistant, providing a solid and durable stepping surface that resists rot.

Additionally, the thick composite cap has a wood-grained texture, enhancing both the appearance and rot resistance to complement your home's interior.

It features zinc dichromate screws with removable caps for corrosion resistance and easy adjustment, ensuring a tight seal.

Specifications

Screws are 9" apart.

Total Width = 1-1/2"

Total Height = 1-1/8"

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Average Customer Ratings

4.8

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Sill Cap

Fit like a glove! However Therma-Tru should have the screws closer to the ends to prevent the end from coming up as my original one did.

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Reviewed by: Tim from NY on 10/29/2021

Adjustable door sill cap

This item matched directly the one I had on my door assembly.

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Reviewed by: James from Laguna Niguel on 4/5/2023

Great sill cap, just not the same

I’ve had a heck of a time finding a replacement sill cap. Our OEM broke and this is the only one in stock I could find with the same spacing between holes. Most are 10” and this one and mine are 9”. However, mine is only 3/4” thick and this one is 1 1/8” or so. It fits perfectly, after an 1/8” trim on both ends, and the door shuts, I’d rather firmly. So I’m happy we have a good sill, just wish I could find the same height, which Therma-Tru doesn’t carry and apparently no one else has the same height.

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Reviewed by: Josh Schlatter from Chapel Hill, TN on 3/1/2026

Homeowner

Great customer service!! We recieved the wrong item and they sent out a new one immediately

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Reviewed by: Amanda from PAINESVILLE on 10/5/2020

Mr.

The best customer service that I’ve ever experienced. I’d give Keegan at diy door store ten stars out of five. I’ve had three other vendors ship me the wrong part, and argue with me when I said it was wrong. Keegan immediately spotted the problem and shipped the correct part UPS next day. Thank you again for such stellar customer service. Rich D.

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Reviewed by: GogelGeek from Edison, NJ on 1/10/2021