Catnic & Galvanised lintel super stockist

Fast track lintel specialists

  • Steel lintels

  • Concrete lintels

  • Cast Stone

  • CXL ‘Extreme load’

  • Thermal Efficient

  • View all products

Windpost Superstore

Configure Online for Next Day Delivery

Build My Windpost

Special Lintels

Configure Online for Next Day Delivery

Build Special Lintel

Structural Steelwork

Select from a range of UB/UC/PFC/SHS/RHS and add your custom fabrication including drilling, mitre cuts, welded top or bottom plates. Select your finish from Self Colour, Painted or Galvanized. UKCA to BS EN 1090-1 Exc2

Not sure what you need?

Use our lintel selector to find the right lintels for your project and requirements. We have the UK’s largest steel lintel range available for next day delivery.

Find your Lintel
Catnic Lintel Range

Lintels of all types

UK’s Largest Range – In Stock

We have one of the UK’s largest single site stock holding of Catnic and Galvanized steel lintels carrying over £3.0m worth of lintels in every cavity size in standard duty, heavy duty and extra heavy duty profiles. We carry a full range of wide inner leaf and wide outer leaf lintels as well single leaf lintels, internal solid wall lintels, external solid wall lintels, timber-frame lintels, and closed eaves lintels.

Extreme Load Lintel CXL Installed

Specialist Lintels

Extreme load lintels?

We are the only UK manufacturer to offer a full range of equivalent extreme load lintels to major brands such as Catnic CXL lintels, IG L6 lintels, Keystone X/K lintels, Birtley SX & Stressline SL/RS lintels. We stock these equivalent lintels up to 6000mm long in a post galvanized finish to BS- EN1461 and can offer next day delivery, Nationwide or a 48 hour click and collect service.

Select your CXL

Popular product ranges

Below are the most popular lintel styles with product codes that we offer an equivalent to each from stock.

Catnic CG90/100 | Keystone SK90 | IG L1/S 100 | Birtley CB90

Standard Duty Cavity Wall Lintel

Wide inner leaf option also available: CG90/125 | SK90 WIL | LI/S 100 WIL | CB90/130 | SL90 WIL length up to 5100mm

Learn more

Catnic CN71A | Keystone Box/K-200 | IG Box 200 | Birtley SBL 200

Standard Duty External Solid Wall Box Lintel

Heavy duty option also available CN71C | CN81B | CN81C | HD Box/K-200 | HD Box 200 | length up to 5100mm

Learn more

Catnic CX90/100 | IG L5/100 | Birtley HD90 | Keystone CFS/K-90

Extra-Heavy-Duty Cavity Wall Lintel Wide-Inner-Leaf

Extra heavy duty lintels available (236mm high) Available in cavity sizes (mm) 50,70,90,110,130,150 Lengths up to 5100mm

Learn more

Order/Delivery FAQs

  • How can I pay for my order?

    Please add your products to basket and proceed to checkout.

    Alternatively you can ring our sales hotline and place your order over the phone.

  • Is delivery Nationwide?

    Yes, our delivery network covers the whole of mainland England/Wales & Scotland.

    We do not offer delivery to the following only;
    Channel Isles
    Isle of Wight
    Scottish Isles

  • What are the opening hours?

    We are open Monday – Friday from 8am-5pm*.
    *Friday – close at 4.30.

    We are also open Saturdays 08:30 – 12:30. Collections by appointment slot only.

    Collections – If we have let you know your order is ready you may collect from 8am-4:30pm Monday-Friday.

  • When will I receive my lintel?

    All items on our website are in stock in large quantities. You can select standard delivery, free delivery or our premium Fast Track & Next day delivery option is also available at basket.

    All lead times are based on working days (Monday – Friday). Please see our T&C’s for full details and cut off criteria.

    The date shown on your order states ‘by x date’. This means your goods will arrive no later than 17:00 on the date shown. Your goods may arrive before this date.

  • Is Fast Track & Next day delivery guaranteed?

    Yes* – just select fast track or next day delivery  at checkout and you will get a confirmation email to confirm your booked delivery day with a 5 hour time slot for your delivery.

    If we do not achieve the delivery once we accept your order we will refund your deliver fee in full, that’s our delivery service promise!

    If we cannot accept your request then we will refund any amount paid for this service & you will have the option to cancel the order for a full refund.

    *N.B – see time restrictions for order cut offs

    All lead times are based on working days (Monday – Friday)

    The date shown on your order states ‘by x date’. This means your goods will arrive no later than 17:00 on the date shown. Your goods may arrive before this date.

  • Do I need be at my shipping address every day to accept delivery?

    Our Free/Standard delivery options are to be delivered up to a certain date (as per your order) between 8am-5pm. However, you do not need to be at your shipping address every day. We will contact you 24-48 hours before delivering.

    So, this means you do not have to wait around on site for the next 7-10 working days for us to show up.

    Our Fast Track and Next Day services come with a guaranteed 5 hour timeslot and a call 30-60 minutes prior to arrival.

    Unfortunately, we cannot guarantee a delivery timeslot or pre-delivery call for free or standard services (due to 3rd party couriers) but you can request this by replying to your order confirmation, we will confirm if this can be added.

    If you have anymore questions, please don’t hesitate to contact us.

  • Where to find the lead times?

    Our lead times can be found in the basket section once the items have been added in.

    You will have to enter your postcode and press the orange button which looks like this




    The Free/Standard/Fast-Track delivery will be delivered BY the date shown in the basket. Next Working Day will be delivered ON the day shown.

  • What to do if I need an order quicker/ I don’t need it until x date?

    In both scenarios, reply to your order confirmation email from us. State whether you would like your order quicker or to delay it.

    • If you wish to have it quicker, we will send you the prices to upgrade to our Fast-Track, Next Day Service.
    • If you wish to delay your order, please state the day you would like us to deliver from, we will put it on hold in our system until the date you provide us with.

    eg. Your order is due to be delivered by 22nd February but you tell us you don’t need the order until after the 6th of March, our Free delivery (10 working days) would then be ‘by 20th March’

  • Can the shipping address be changed after ordering?

    Yes. If you wish to change your delivery address, you may do so by replying to your order confirmation email from us with your new shipping address.*

    However, once the order is dispatched, you will no longer be able to change the address. As at that point, it has already left our depot.

    *For Next-Day, Fast-Track orders there may be extra charges as these delivery options are based on mileage.

Steel Lintel FAQs

  • What if you don’t have the lintel code I need?

    You can use our lintel finder to assist you.

    We have a technical department that can assist – please call us and ask for lintel technical.

    Our manufacturers also have great technical departments that can assist as below;

    Catnic Technical – 02920 337900

    Stressline Technical – 01455 272457

  • How to install a steel lintel?

    Installation should always be inline with the manufacturers guidelines. If you are in doubt as to the structural performance or suitability of a lintel then please contact the manufacturers technical department before ordering/installation.

    Each lintel is different but most steel lintels should be propped at 1.2m ctrs and not removed until the mortar has cured.

    Minimum recommended end bearing = 150mm. The lintel should be bedded on mortar and levelled both along the lintel and across its width. Full bricks, blocks or padstones should be used as bearing areas. Do not bear onto cut blocks.

    All external wall lintels MUST be installed with a flexible damp proof course (DPC) or cavity tray. In the case of cavity walls the cavity tray should extend not less than 50mm beyond the cavity return.

    Inner and outer leaves supported by lintels should be raised together to avoid excessive eccentricity of loading.

    Masonry must not overhand any flange by more than 25mm.

    Masonry above the lintel should be allowed to cure before applying floor or roof loads.

    Further guidance can be found in the manufacturer’s literature.

  • CXL Extreme Load Lintels – are these made to order?

    No, we manufacture our own version of CXL style Extreme Load lintels in every cavity size (50,90,110,130,150mm) from 0750mm – 6000mm long.

    We can manufacture any length greater than this if required.

    Please note: these items are cut to length from longer stock profiles. Once cut these items are non-returnable and the order cannot be cancelled.

  • Are your lintels equivalent to Catnic / Keystone / IG / Birtley?

    Our lintel range is the largest in the UK amongst any manufacturer.

    We offer the equivalent lintel codes on each of our product pages and provide the loading data of our lintels for cross checking against other manufacturers items. Our lintels are the equivalent in function for each product code, there are often small differences in each manufacturers technical loading data, therefore please check the product specification table for the specific product against your alternative manufacturers code prior to ordering.

    Our own brand lintels are

    • BSI Quality Assurance Accreditation to ISO 9001
    • BS EN ISO 9001

    For further assistance please view

  • Where to find the loading tables of lintels?

    You will find our loading tables at the bottom of the item page.

    To understand what the tables mean, you can go to our technical page.

  • Can I return an Item or cancel my order?

    You can request this via the My Account section. However, please note many items in our range are cut from longer length stock profiles. These items are non-returnable and the order cannot be cancelled once the cutting has taken place. These items are therefore bespoke items to your selected length. You will receive a notification about this post purchase. Please contact us immediately to put you order on hold or cancel should you possibly wish to return an item post purchase. Our team can assist in notifying you if the items on your order are cut or non cut items. We can also inform you of this prior to you making an order should you require.

Installation guidelines

Installation should always be in line with the manufacturer’s guidelines. If you are in doubt as to the structural performance or suitability of a lintel then please contact the manufacturers technical department before ordering/installation.

Further guidance can be found in the manufacturer’s literature.