Sash windows are a highly desirable period feature that are few and far between, so maintaining and refurbishing them has become a top priority for traditional property owners.
One of the many procedures some homeowners are anxious to pursue is a new paint job, which requires preparation, essential equipment and a step-by-step guide to ensure sash windows remain in top condition after their new coat of paint is applied.
Here’s a comprehensive guide provided by Sash Window Experts to painting sash windows, so don’t be afraid… go and grab that paintbrush collection!
The Preparation Process
The first thing you need to do is make sure that any repair work, rot treatment (video tutorial on YouTube) and double glazing has been carried out to completion. Once you’ve checked this, it’s time to prepare your sash windows for painting.
Remove sash furnishings such as windows fasteners and handles and wash down any previous paintwork with soap before rinsing. Use sand paper to ensure each surface is free from grit and dirt. If a lead-based paint was used then you should use a damp cloth to prevent toxic dust from being released into the air.
A hot air paint stripper is useful if you have experience using one. Strip mouldings using a shaped shavehook while protecting the glass using a suitable shield. If you are burning off lead paint using a hot air remover, make sure you wear the appropriate face mask.
Any exposed or bare wood that are not already painted should be left this way as it’s how they are meant to be.
You’ll need a safe ladder if the sash windows are on higher floors, along with a protective dustsheet, a pint kettle and appropriately sized brushes.
A one inch brush is best suited for glazing bars, while a larger brush should be sued for other areas.
You might see pros using the largest brush they have all the time, which is only recommended if you have sufficient amounts of experience. Paint kettles make holding on to paint straightforward, while they can also hold plenty of paint at one time. You also won’t have the issue of getting grit or dirt in the paint tin.
In order to choose the right paint, you should find out which paints are compatible with others by asking a reliable supplier. Stirring paint well is also essential as the constituents separate out soon after purchase and storage. You shouldn’t paint in very hot or very cold weather, nor in the rain!
Painting Internally and Externally
For both internal and external painting, make sure the sash slides down a little with the inner sash raised slightly. This should leave a useful gap between the top and the bottom.
Start by painting the glazing bars and the inner sash surfaces, before painting the outer sash including the face of the meeting rail. Slide the outer sash up (not completely) and lower the inner sash by gripping it from the outside to avoid touching wet paint. Complete the outer sash painting process and leave the sashes in these positions so that they dry properly.
If you are worried about the colours being used and where they should finish, simply know that there aren’t hard and fast rules you need to stick to. The only issue would be when sharply contrasting colours are used, whereby your own judgement would need to come into account.
Video: How to Paint an Exterior Sash Window
Source: British Paints