Birtley Internal Wall Box Lintel 100mm SB100
Birtley Internal Wall Box Lintel 100mm SB100 - 750mm is backordered and will ship as soon as it is back in stock.
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The Birtley Internal Wall Box Lintel 100mm SB100 are a reliable solution for standard-duty, internal wall box lintels. Perfect for load-bearing block walls, these 100mm box lintel offers more insulation. Birtley offers a clear advantage over traditional steel lintels with its unique, post-fabrication hot-dip galvanisation that creates nearly 50% more zinc protection compared to other approved coatings used in conventional structural lintels. The Supergalv coating extends longevity and ensures no compromises in paint protection.
Features:
- Better Zinc Protection: At post-fabrication hot-dip galvanisation, Birtley offers unsurpassed zinc protection of up to 50% for more durability.
- Extended Lintel Life: Thanks to Supergalv coating, the lifespan of Birtley SB100 lintel has been considerably extended.
- Paint Protection: Post-fabrication galvanisation ensures no surface has inferior paint protection, ensuring that the 100mm box lintel remains resilient for years.
- Improved Insulation: For better performance, an insulated version of the 100mm cavity lintel is also available, giving you flexibility in meeting specific insulation needs related to your project.
- Available in span lengths from 750mm to 4800mm.
- Made from structural grade steel to EN10025

Description
Description
The Birtley Internal Wall Box Lintel 100mm SB100 are a reliable solution for standard-duty, internal wall box lintels. Perfect for load-bearing block walls, these 100mm box lintel offers more insulation. Birtley offers a clear advantage over traditional steel lintels with its unique, post-fabrication hot-dip galvanisation that creates nearly 50% more zinc protection compared to other approved coatings used in conventional structural lintels. The Supergalv coating extends longevity and ensures no compromises in paint protection.
Features:
- Better Zinc Protection: At post-fabrication hot-dip galvanisation, Birtley offers unsurpassed zinc protection of up to 50% for more durability.
- Extended Lintel Life: Thanks to Supergalv coating, the lifespan of Birtley SB100 lintel has been considerably extended.
- Paint Protection: Post-fabrication galvanisation ensures no surface has inferior paint protection, ensuring that the 100mm box lintel remains resilient for years.
- Improved Insulation: For better performance, an insulated version of the 100mm cavity lintel is also available, giving you flexibility in meeting specific insulation needs related to your project.
- Available in span lengths from 750mm to 4800mm.
- Made from structural grade steel to EN10025
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Exceptional Strength for Internal Walls

Precision Engineering for Reliable Performance
Compact and Easy to Install

Trusted by Professionals Across the UK
Why Choose the Birtley SB100 Lintel?
Our customers tell it better than we do!
Excellent Delivery Service
Order arrived early in morning, delivery staff were excellent and able to place order as close as possible to where I required it. excellent communication through out delivery and after delivery.
Great Experience
Great experience Really pleased with the way my order was dealt with and delivery arrived as advised.
Good product and service
Good product, reasonable price, great service and good customer follow-up. Would recommend and use again.
Great Company
Great company, great product. Delivery was very speedy and items was delivered professionally by a very helpful driver. Would highly recommend.
Great quality wood and fast delivery
Great quality wood and fast delivery The company reached out to make sure that everything was good and the delivery went fine
Excellent service from a great company
Ordered 2T of midnight blue slate chipping (2 pallets of 50 bags each) Very nice product at a great price. Contacted quickly after order to arrange a suitable delivery date. Delivery was as arranged. Customer service is excellent including follow up call to ensure everything went well. All in all I would highly recommend Armstrong Cheshire.
Great Customer Relations
Due to a mistake in communication ( mostly my mistake) the first delivery of bulk aggregate went to an address I used to live at. After asking to have a replacement delivery to the correct address Armstrong Cheshire re-scheduled the delivery within 3 days and with fantastic customer relations. I cannot recommend this company enough.
Ultra Fast Delivery
Ultra fast delivery, technically superlative company, their products are light years ahead of all others. Unbelievable prices. I have been in construction for nearly 70 years now and am still working every day. This company is why I keep getting up in a morning. Thank you dear sirs/ Madam for making life easier
Steel Lintel
Easy to pick product online, said 10 days delivery but got the product in 4 days, excellent service and prices