Sill profiles

Exterior window sills

Exterior sill profiles use a lightweight EPS core and a coated finish designed for exterior use. Compare the listed projection with the wall and window drawing; your designer or installer confirms returns, drainage and adjoining trim.

Choose a sill profile against your opening dimensions and wall detail. Compare molding projection and share your drawing before ordering.

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Project fit

Who this page is for

01

Planning window details

Compare sill proportions with the opening and adjacent trim.

02

Measuring for installation

Record opening widths and the intended end and return details.

03

Reviewing drawings

Check the listed dimensions against the project specification.

Profiles to compare

Browse exterior window sills

Product specifications show the listed dimensions, finish information, price, and availability for each option.

Make a confident choice

How do I match a sill to the opening?

  1. 01

    Measure the opening

    Record each opening width and the relationship to adjoining window trim.

  2. 02

    Check projection

    Compare the moulding projection on the product page with your project drawing.

  3. 03

    Review installation details

    Confirm water management and finishing details with your project system and installer.

From measurements to pieces

Estimate a starting quantity

This estimate uses one selected profile. Check its piece length and your cut list before ordering.

Estimate with Exterior Sill Molding 3 1/2" x 4 1/2", a profile with a listed 96″ piece length. Confirm your cut list before ordering.

Estimate how many pieces you need

Corners, profile matching and layout can change what you need, so we'll double-check on your quote.

Plan your selection

Buying guides

Buying guideChoosing exterior window trim and matching sillsRead guide Buying guideWhat will my molding project cost?Read guide

Before you request pricing

Common questions

How do I choose a sill projection?

Compare the product dimensions with your wall and opening drawings. Your installer or designer can confirm the detail for the project system.

Can I estimate several openings together?

Add the required linear lengths, then use the piece calculator for a selected profile. Confirm cuts and waste before ordering.

Next step

Bring your project details together

Share the selected profile, measurements, quantities, finish notes, and destination. We will review the request and confirm the next steps.

Get project pricingRead molding guides