Seamless can be an installer’s strongest upsell, says Steve Collett, sales director at Dekko Window Systems.

Look closely at the corners of a newly fitted window and you will learn a great deal about the product. For years homeowners accepted the grooved weld line as part of the deal with PVC-U. But that acceptance is fading fast.

Fully seamless finishes have moved from niche to mainstream in a remarkably short space of time. Homeowners who once compared windows on price and U-values alone now study the frame up close and notice the finish first. They want the clean character of timber without the upkeep, and a fully seamless weld delivers exactly that.

For installers, this shift is an opportunity. A finish is something a customer can see and touch in the showroom. Put a standard welded sample beside a seamless one and the conversation changes. It means you can start selling something the homeowner can appreciate with their own eyes and that supports a stronger price and a healthier margin.

I have watched installers reshape their businesses by leading with seamless. They step away from the race to the bottom and attract homeowners who value quality and expect to pay for it. Referrals follow, because a seamless window still looks right long after the fitters have gone.

There is one caveat though. Any installer building a reputation on seamless needs a fabricator who can deliver week in, week out. That’s why we have committed so heavily to Graf technology at Dekko. We were among the first fabricators to adopt Graf Synergy for our Infinity range and later the Residence Collection. Seven years ago we completed a world first with the Graf Cil Welder.

Today we run the UK’s only five-head Graf seamless welder, with a new three-head machine from Haffner soon to be added alongside it making us the only company in the country operating two. If one welder needs attention the other keeps running, so seamless production carries on regardless.

You can see the results in our Infinity Flush casements and Infinity composite doors, with timber-look corners and none of the grooved joints found on standard welded frames.

Seamless is no longer a trend to watch from the sidelines. Instead, it’s fast becoming the standard homeowners expect. And the installers who learn to sell the finish now will be the ones who reap the rewards.