The Lewmar Ultra Low Profile hatch is a flush, low-profile deck hatch that sits just 10 mm above the deck and retrofits directly into existing Lewmar Low Profile, Medium Profile and Ocean hatch cut-outs. It pairs a durable anodised aluminium frame with a lightweight grey acrylic lid, giving you a clean deck upgrade in most cases without re-cutting the deck.
Lewmar Ultra Low Profile hatch at a glance
| Feature | Detail |
|---|---|
| Deck profile | Flush — sits just 10 mm above the deck |
| Lid material | Grey acrylic — durable and lightweight |
| Frame material | Anodised aluminium — corrosion-resistant for saltwater use |
| Retrofit fit | Matches Low Profile, Medium Profile and Ocean Hatch cut-outs |
| Hinge / ventilation | Holds open to any position up to 90°; 360° vent position |
| Lid / handle options | Flush bi-square lid or external opening handle (selected sizes) |
What is the Lewmar Ultra Low Profile hatch?
The Ultra Low Profile hatch builds on Lewmar’s proven Low Profile design, with flush, clean lines that minimise impact on the deck. The lid is grey acrylic—durable and lightweight—while the anodised aluminium lower frame provides excellent corrosion resistance even in harsh marine environments. At just 10 mm above deck, it keeps the deck uncluttered and reduces the chance of stubbed toes and snagged sheets.
What are the key features and benefits?
- Sleek, modern aesthetic: flush 10 mm profile for a clean, uncluttered deck.
- Durable and lightweight: grey acrylic lid paired with an anodised aluminium frame.
- Corrosion-resistant frame: built to hold up in harsh saltwater environments.
- Versatile hinge: a hinge system holds the lid open at any position up to 90°.
- 360° vent position: optimises airflow below deck.
Is it a direct retrofit for my existing hatch?
In most cases, yes. The Ultra Low Profile hatch is designed as a seamless retrofit: the cut-outs match Low Profile, Medium Profile and Ocean Hatch installations without modification, and it is compatible with existing Lewmar trims and flyscreens. That makes it a cost-effective upgrade—you can typically replace an aging hatch without re-cutting the deck. If you are unsure of your current hatch, check its Lewmar size number or measure the deck cut-out before ordering.
How do I choose the right hatch size?
Lewmar sizes its hatches by a size number (for example Size 10, 20, 40, 54, 60 or 70), and each number corresponds to a specific deck cut-out. To choose correctly, measure your existing cut-out (or check your current hatch’s size number) and match it. Then decide between the flush bi-square lid for a seamless look, or an external opening handle (available on selected sizes) for easier operation from on deck.
Frequently asked questions
How high does the Lewmar Ultra Low Profile hatch sit above the deck?
It sits just 10 mm above the deck, giving a flush, unobtrusive profile that keeps the deck clean and reduces snag points for sheets and toes.
Can I retrofit it into my existing hatch cut-out?
Yes. Its cut-outs match Lewmar Low Profile, Medium Profile and Ocean Hatch installations without modification, and it is compatible with existing Lewmar trims and flyscreens—so in most cases you can replace an older hatch without re-cutting the deck.
What is the hatch lid made of?
The lid is grey acrylic, which is durable and lightweight, and the lower frame is anodised aluminium for excellent corrosion resistance in harsh marine environments.
How do I choose the right Lewmar hatch size?
Lewmar hatches are identified by a size number (such as 10, 40, 54, 60 or 70) tied to a specific deck cut-out. Measure your existing cut-out or check your current hatch’s size number and match it, then choose between a flush bi-square lid or an external handle on selected sizes.
Does it have ventilation options?
Yes. The hinge system holds the lid open at any position up to 90°, and a 360° vent position allows optimal airflow below deck.
Is the Ultra Low Profile hatch suitable for saltwater use?
Yes. The anodised aluminium frame is built for corrosion resistance in harsh marine environments, making the hatch well suited to offshore and coastal saltwater sailing.
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