Beading Calculator, Epoxy Calculator and Sash Weight Calculator: Free Tools

You've decided to restore your sash windows. You probably want to draught seal them with new beading, there's a good chance there's some rot that needs repairing, and there's a fair chance, if the glass has been changed over the years, that the weights need replacing as well. You've found our website, and you can see that we have everything you need: Ecobead draught seal beading, Evermend two-part epoxy wood filler, and sash window add-on weights. But now comes the head-scratching part: trying to figure out exactly how much of everything you actually need.

For beading, of course, we have our handy kits. But sometimes these aren't quite right. The dimensions might not match your windows, or you might have multiple windows where buying a kit isn't necessarily the most cost-effective option. Sometimes you may only be looking at replacing the stop bead, sometimes you may only be replacing the parting bead, and this is exactly where a beading calculator comes in.

Then there's the rot damage. You're looking at your window, you can see the soft, decayed timber that needs repairing, and you're looking at our Evermend epoxy cartridges online. But how does that translate into how much you actually need? Is one cartridge enough, or will you need three? This is exactly what our epoxy wood filler calculator now answers for you.

And if your sash windows use the traditional weight and pulley system, there's a third question waiting for you. If your glass has been upgraded, or your window feels heavy, wrong, won't stay open, or slams shut, you need to know exactly how much your sash weighs so it can be correctly counterbalanced with the right size lead weight. Guessing the weight means a window that's still hard to operate or won't hold its position. This is where our sash weight calculator comes in.

Why We Built These Calculators

Over the years we've had many calls and enquiries from customers and trade professionals asking the same handful of questions:

• "How much stop bead and parting bead do I actually need for my sash windows?"
• "How many cartridges or pots of Evermend epoxy will this repair take?"
• "How much does my sash actually weigh, and how many add-on weights do I need?"

The way this has always worked for us is that a customer would call in with their window measurements, and we'd be on the other end of the line sketching it out on a bit of paper, working through the dimensions by hand, and figuring out how to translate that into an order with as little wastage as possible. Everything we used to work out by hand on a notepad is now done instantly, right there on the website, and the working is shown so you can see exactly how each number was reached.

The Beading Calculator: Get Your Stop Bead and Parting Bead Measurements Right, Every Time

Our Beading Calculator takes the sizing logic from our popular guide, How to Calculate How Much Beading Is Required, and turns it into an interactive tool. Simply enter the dimensions of your sash window opening, and the calculator instantly works out:

• The total length of stop bead required
• The total length of parting bead required
• How many lengths of Ecobead pre-assembled draught seal beading you'll need to order to cover the job, with minimal offcuts and wastage

Whether you're a restoration tradesperson quoting multiple windows across a job, or a homeowner tackling a single sash window draught-proofing project, the Beading Calculator removes the manual measuring errors that lead to under-ordering, and the frustrating wait for a top-up delivery, or over-ordering, and paying for timber you'll never use. It works for full sets, or for stop bead and parting bead ordered separately, so you're never forced to buy more than the job actually calls for.

The Evermend Epoxy Calculator: Know Exactly How Many Cartridges or Pots You Need

Timber rot repair is a different kind of measuring problem, since you're working with volume. That's why we built the Evermend Epoxy Calculator, designed specifically around our Evermend two-part epoxy wood repair systems.

Here's how it works:

1. Measure your repair cavity: length, width, and depth of the rotten or damaged timber section once you've cut back to solid wood.
2. The calculator works out the volume of epoxy filler required in millilitres, automatically factoring in a sensible waste margin so you're not caught short mid-repair.
3. It converts that volume into exactly how many Evermend cartridges or pots you need to add to your cart, whether you're using the fast 1-hour cure or the more workable 4-hour cure.

No more rough guesses, no more rounding up "just in case" and ending up with unused epoxy sitting around. Just an accurate order, based on your actual repair, whether that's a small section of rotten sill, a simple splice, or several windows' worth of timber decay.

The Sash Weight Calculator: Get Your Counterweights Right, Every Time

Many double hung sash windows in Australia rely on a weight and pulley system, with cast iron or lead weights hidden in pockets on each side of the frame, to counterbalance the sash and let it glide open and closed with little effort. When the system fails, and a window feels heavy or won't stay open, or is slamming shut, you need to know exactly how much your sash weighs so it can be correctly rebalanced.

When a window has been reglazed, upgrading to thicker safety glass, laminated glass, or double glazing can add significant weight that the original counterweights were never sized for. It can be confusing knowing how many add-on weights you need to add on either side.

Our new Sash Weight Calculator does this for you. You still need to weigh your window, as this, in our experience, is the only accurate way to get this right, but once you've done this you simply enter the weight of the top and bottom sash, and what weight you already have there, and our calculator will give you:

• The correct counterweight required, for both top and bottom sashes
• A running total across multiple sashes, ideal if you're rebalancing several windows in the one job

Built for Both Trade and DIY

Whether you're a professional timber window restorer working through multiple jobs a week, or a homeowner repairing a single rotten sill or rebalancing one window, all three calculators are designed to be quick to use and easy to understand, with no technical knowledge or trade experience required. Just measure, enter your numbers, and order with confidence, wherever you are in Australia.

We're Still Just a Phone Call Away

These calculators are a tool for those who want the answer instantly, at any hour, without waiting for us to pick up. But if you'd rather not use them, that's completely fine. Pick up the phone, give us a call, tell us your measurements, and we'll work it out for you, exactly like we always have done. The calculators are there to make things easier, not to replace the personal service we've built our name on.

Order With Confidence

We hope these calculators save you time, save you money, and take the stress out of ordering for your next sash window restoration or timber repair project.

Give them a try, and if you run into anything unexpected or have suggestions for how we can make them even better, our team is always just a phone call or email away.