INDIANA LIMESTONE · SILLS · ONTARIO MADE
Limestone Window Sills.
Slip Sill or Lug Sill Profiles.
Limestone sills for every opening in the GTA.
Indiana Limestone window sills are among the most specified architectural elements in residential and commercial masonry across Ontario — a subtle but essential detail that elevates the appearance of any brick or stone facade. At Tulip Precast in Brampton, we fabricate both slip sills and lug sills in five standard profiles, plus custom sizes and heritage profiles for non-standard applications.
Whether you need a simple slip sill flush with the masonry opening, or a full lug sill system that extends into the masonry for maximum architectural presence, every sill we produce is fabricated with custom shop drawings and produced in Indiana Limestone — the same material used on some of Canada's most celebrated buildings.
Sills
Sills are among the most essential architectural elements — adding understated style to any project. Slip sills are designed to align seamlessly with the width of the masonry opening. Lug sills extend beyond the window, allowing for the installation of a full surround and a more pronounced architectural presence. Custom sills are also available.
Slip sills sit flush within the masonry opening. Lug sills project beyond the window frame — use a lug sill when installing a full surround system for the most architecturally complete result.
Available Profiles
Frequently Asked Questions
What is the difference between a slip sill and a lug sill?
A slip sill sits flush within the masonry opening — the same width as the window frame. A lug sill projects beyond the window frame and extends into the masonry on both sides, allowing for a full surround system and more pronounced architectural presence. Tulip Precast fabricates both types in Indiana Limestone in a range of profiles.
What limestone sill profiles does Tulip Precast offer?
Tulip Precast fabricates Indiana Limestone sills in five standard profiles: Classic Slip Sill, Classic Bull Nose Sill, Conventional Sill, Double Slope Sill, and Conventional Sill with Lip. Custom profiles are also available for heritage matching and contemporary designs.
Can limestone sills be combined with surrounds?
Yes. A lug sill combined with jambs and a head surround creates a complete architectural window system — the most refined option available. Tulip Precast fabricates all components as a matched set with custom shop drawings.
Do limestone sills perform well in Ontario's climate?
Yes. Indiana Limestone performs reliably through hundreds of freeze-thaw cycles without cracking or spalling and has been used on some of Canada's most prominent buildings for over a century. Tulip Precast sills are fabricated from the same high-quality Indiana Limestone used in institutional and commercial buildings across the GTA.
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