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We begin by assessing the condition of the sash window, identifying any areas of damage, decay or wear.
We evaluate the functionality of the sashes, frames, pulleys, cords and other components.
We also examine the existing draft-proofing methods and determine the best approach for upgrading them.

Repair and restoration 

Damaged or rotten wood components are repaired or replaced. This may involve patching, splicing in new sections of hard wood, replacing sills or sashes as needed.
Cracked or broken glass panes are replaced, and any damaged putty or glazing compounds are carefully removed and replaced with fresh material.

Routing the sashes

We carefully route new grooves into the sashes using specialized routing tools. These grooves will accommodate the draft-proofing materials.
The depth and width of the grooves are measured and adjusted to ensure a proper fit for the draft strips.

Replacing the beading

We remove the existing inner beading that holds the sash in place as well as the centre parting bead.
We replace it with a wooden equivalent that has a groove or channel machined into it to house the draft strip.
The new beading is cut to the appropriate length and shape to fit snugly against the sashes. 

Installing the draft strip

We select the suitable draft-proofing materials, normally brush strips, that will fit into the grooves in the sashes and beading.
The draft strips are inserted into the grooves, ensuring a tight seal when the window is closed.

Finishing touches

The restored window, including the newly routed sashes and replaced beading, is primed and painted or finished using appropriate exterior-grade paint or stain.
Hardware components, such as sash lifts, locks and handles are inspected, cleaned and possibly replaced or upgraded to ensure smooth operation and optimal security.


Final adjustments and testing

The restored window is tested for proper operation, including opening, closing and locking.
The draft-proofing materials and the new beading with draft strips are checked for effectiveness by testing for drafts and air leaks when the window is closed.

RJB can restore traditional sash windows and upgrade the draft proofing by machining the sashes and replacing the inner beading and centre parting bead with a wooden equivalent that has a draft strip machined into it. Here's a general description of how we approach this process.

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