How to fix uneven surface for roller shutter door?

[Yangaz]

Hi folks, 

Just had a new roller shutter installed onto my carport. Looks and works amazing but there is one thing that keeps popping up when I look at it. The ground surface where the roller door was installed is not even so when the roller shutter closes it has gaps at the sides (the left side is about 40-50 mm and the right side is about 20mm). 

Looking for a workaround, options are to put a brushed garage door seal like this https://www.bunnings.com.au/moroday-70mm-x-2-55m-garage-brush-door-seal_p4062459 or grind the area where it is not even to get a flush seal.

Would love to get your thoughts.

Gaps at the bottom of roller shutter door due to uneven surface

[MitchellMc]

Hi @Yangaz,

I completely agree with your assessment. It's common for installation surfaces to have some unevenness, and it's great that you're proactive about finding a solution. Installing a garage brush door seal like the one you linked to is a practical and relatively simple solution, effectively sealing the gaps.

On the other hand, grinding the uneven surface to achieve a flush seal is a more involved process but could provide a long-term solution that improves both the functionality and appearance of the installation. However, given the height difference, I believe that would be a substantial amount of concrete that you'd need to grind away.

Your choice between these options will depend on personal preference, budget, and DIY skills, but if you were to consider grinding the concrete I'd be looking at enlisting the services of a professional.

Please let me know if you have more questions,

Mitchell

[Yangaz]

Thank you Mitchell,

What type of angle grinder blade would I need to cut up the existing surface (concrete) to get a flush seal? I assume I would need some kind of seal/render to smooth out once the surface has been grinded to suit?

[MitchellMc]

If there is a 50mm gap on the left, to close that, you could assume you'd need to remove 50mm of concrete in the middle @Yangaz. That's really outside of the capabilities of D.I.Y. and a handheld angle grinder. You'd need something like a concrete saw to cut the concrete away and then a floor grinder to smooth out the surface. I'd recommend you get a couple of professional quotes on this work to determine if it's something best left to the experts.

Another option might be to level the area with new concrete.

Mitchell