Interior Window Sill
We have a great selection of interior window sills for you to choose from. Whether you're looking for something classic or contemporary, we have an option that will suit your style. Our sills are made from high quality materials and are designed to last. We also offer free shipping on all eligible orders, so you can be sure you are getting the best possible deal. So browse our selection today and find the perfect finishing touch for your windows.
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Interior Window Sill | Internal Window | Window Sills

Interior Window Sill

The window sill, also known as window ledge or window bottom, is an integral part of window design and functionality. It can be made from material such as wood or upvc and can be seen on the outside of most homes. Contrary to popular belief, it is not found inside the home; the interior window piece referred to sometimes as the “sill” is actually called a stool. Without internal window sills, any unwanted water or snow can easily make its way into your home, making them essential for keeping your home secure from moisture damage. Whether you're choosing window sills for cosmetic purposes or looking to maximize their protective capacity against the rain and snow, they give function just as much importance as form when it comes to window installations.

Oak Window Board

Our window solutions offer a truly stunning finish with our majestic oak window board. They are constructed from solid prime grade European Oak and will offer you a light honey tone, as well as display natural grain and figuring along with some small knots. You can choose between square or waney-edged front profiles, and they come unoiled so that you can add whatever finish you wish to achieve the desired look. Our window sills come in extraordinary lengths of up to 3m, depths of 500mm and thicknesses ranging between 25mm and 48mm. The wider window boards can be used for window seating, providing an exquisite feature for any design project. Additionally, we also machine skirting boards, architraves, door linings and floors as part of our window package range. While we cannot provide full window frames, we are able to supply planed-all-round timber for the construction of window casings and frames.

What is an inside window sill called?

Window sills are integral components of window structures, providing structural integrity and also aesthetics. Window sills are generally made of wood and are usually installed at the base of window frames, both on the outside and inside, although some homes with window units will feature an internal window sill only. This interior window sill usually plays a larger role in design aesthetics than function. From a distance window sills may look like simple shelf-like pieces, but they offer protection from water penetration that damages window frames and plaster walls. Additionally, window sills act as insulation between cool air from outside or hot air from inside the home. For homes with added window units, current technology allows for energy efficient window sills that improve insulation by up to 40%.

How do you make an internal window sill?

Securing window sills in your home is an important task, as window sills form one of the primary means of structural and aesthetic protection against potential damage to both window frames and window glass. To ensure that appropriate window sill material is used when purchasing window sills, it is essential to measure the width and depth of your existing window sill before removal. Additionally, be sure to note any specific characteristics such as patterns or recessed grooves that will require a specially designed internal window sill.

The width measurement should also include the amount you’d like your window sill to extend beyond the window itself, usually made up of a few inches of wood. By noting these measurements and details before shopping for window sills, you can rest assured knowing you have ordered a window sill that properly fits your home’s needs.

Installing window sills can be a daunting task, but if done properly they can add character to your window frames. Make sure you will need to start off with a new length of wood and a miter saw. The first step is to cut the window sill length with the saw set at the desired angle. Next, use a jigsaw to measure and cut the depth of the window sill. With patience and precision, you can have beautiful window sills to enhance your windows.

Dry fit the window sill to make sure it fits. Carefully shave off a little if needed. Lightly sand over any edges or rough ends.

If you’re looking to make some window sill design changes at home, applying two coats of paint with a Super Finish Max Paint Sprayer is an excellent way to accomplish it. Before you begin painting window sills, you need to place drop cloths beneath them in order to protect the surface underneath and avoid any potential messes. To ensure that your window sills turn out perfectly, place the wood sills on blocks of wood before applying the paint so nothing touches the sides.

Install window sills. Add construction glue to the sill first, place the window sill in position. If you’re adding an apron or window trim around the window, do that next.

Caulk around the window sill, sealing gaps and spaces.

What is Window Board and the best material used for it?

When window boards are necessary, they provide an elegant finish to window reveals. Window boards, or window cills, fill the gap at the bottom of window frames and are designed to fit snuggly against the window casing. These window boards are usually made of wood and offer extra protection from water damage. The window board is fitted on top of a moulding that covers any imperfections in the reveal, creating a seamless integration into the existing window design. Many window boards feature designs that match the window casing or can be customized to create a unique look for each window in your home.

Are UPVC window sills any good?

White Window Board and Sill products offer homeowners an exciting opportunity to easily and affordably spruce up the look of their home. Whether you have wood window sills that need replacing, or you’re looking for energetic ideas for UPVC internal window, these board and sill systems provide a budget-friendly solution. Thanks to their UV stability, they won't fade or discolour with time, while the non-toxic profile materials are reliable, robust and environmentally friendly — with benefits such as being fully recyclable.

How do you replace interior window sills?

When it's time to replace your wooden window sill, be sure to approach the job with care. Begin by opening the window and using a utility knife to slice through any layers of caulk, paint, or adhesive holding the old sill in place. Utilizing a putty knife or blade from an oscillating multitool can help loosen up the wood window sill if it isn’t ready to budge. Once you’ve separated the internal sill from its cover, go ahead and remove it from the room for good. Before you know it, you'll have made space for your brand new window sill.

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