Rot Repair and Security | SashWise

We can repair rot problems to sash boxes, window sills and sash frames. We also provide a wide range of window furniture and locks to ensure your sash windows are safe and secure. These services will form part of our main services which are detailed at the bottom of this page, not as a standalone repair


Rot Repair

Minor rot problems are resolved by cutting back any rotten timber until only good wood remains. A wood preserver is applied and then a specialist two-part epoxy resin is used to construct a hard-wearing repair.

For more extensive rot damage to sashes, boxes or window sills, new timber can be spliced into the box or sill to match the original design and provide an unobtrusive repair. If necessary, we can replace the whole window sill.

Should the sliding sash be beyond repair then we can produce and fit a replacement timber sash, matching any detail molding or profile to replicate the original window. All our timber is from sustainable sources and treated with a wood preserver.



The sash windows of many homes in West London are often secured by a single, central sash fastener. Both leading insurance firms and the Metropolitan police acknowledge that these fasteners on their own cannot be relied upon to provide adequate security against illegal entry. SashWise can supply and fit a range of tried and tested products to make your sash windows safe and secure, whilst remaining fully functional and not detracting from the authentic charm of your property.

Sash stops are strong and convenient to use. This key operated lock will secure sliding sashes in the closed or slightly open position to provide ventilation, whilst at the same time providing security from intruders and preventing small children from climbing or falling out of the window.

In addition to locks we can fit a range of high quality sash furniture that will complement your windows. As with all of our period fittings these can be supplied in a range of finishes to complement your existing window.

Our Other Services

Servicing and Draught-Proofing

If your sash window are jammed, or the cords are broken, this service will get them working smoothly again        

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Full Restoration

We will completely and sympathetically restore the windows, so they will look like new without losing any original features.

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New Hardwood Double Glazing

Here at SashWise we can make new double glazed hardwood timber sash windows to fit within your original box sash frame.

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New Hardwood Sash Boxes

We can supply and fit new hardwood sash boxes complete with double glazed sash windows that replicate the originals.

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