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Keystone BOX/K-100 Solid Wall Box Lintel 4000mm INS

SKU

KBX14INS

£262.86 £219.05

Product Information

Keystone BOX/K-100 Solid Wall Box Lintel with insulation, 4000mm (13'1") length for solid walls 100-215mm wide.
Designed for standard load support on internal openings within solid masonry walls.
Built-in insulation enhances thermal efficiency on site.
Box lintel carries full wet masonry load immediately after installation.
Lintels require a minimum 150mm bearing each end, bedded on mortar; propping recommended for faster build.

Details

The Keystone BOX/K-100 Solid Wall Box Lintel 4000mm INS is a specialist lintel designed for builders and contractors working with solid masonry walls between 100mm and 215mm thick. Featuring integrated insulation, it improves thermal performance while reliably supporting internal openings. Please note, the lintel must be installed with proper bearing and bedding for safety and effectiveness.

Application

This box lintel is ideal for supporting standard loads over internal openings in solid walls, such as doorways and window reveals. Its robust design allows it to carry the full weight of wet masonry immediately upon installation, helping maintain build quality and site productivity. The insulated version adds value by reducing thermal bridging in critical structural areas. Suitable for use on serious projects where reliability and compliance with best practice matter.

Dimension

Length: 4000mm (13'1")
Wall width compatibility: 100-215mm
Height: 215mm
Width: 95mm

Material

Steel lintel with built-in insulation layer

Type

Box lintel for solid masonry walls
Standard duty structural support

Important: Keystone BOX/K lintels require a minimum end bearing of 150mm on each side, bedded on mortar. Propping is recommended to speed up construction safely. All dimensions and guidance are provided as a reference; please contact our sales team for technical advice tailored to your project.

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	4000mm
Weight	52.280000
Manufacturer	Keystone
Sap Id	KBX14INS

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Delivery Information

Delivery availability

We deliver to most mainland UK addresses. Some postcode areas are excluded – please see the full list below.

Delivery charges

Delivery costs vary depending on your location, the products ordered, and the delivery method selected. All delivery charges are calculated clearly at checkout.

Fuel Surcharge

Information on our added Fuel Surcharge can be found at https://condell-ltd.com/fuel-surcharge-notification

Delivery dates

You can request a preferred delivery date at checkout. While we aim to meet this wherever possible, availability may depend on stock levels and third-party delivery schedules. If your chosen date is unavailable, a member of our team will contact you to arrange an alternative.

Delivery method

All deliveries are made kerbside as standard. For health and safety reasons, drivers are unable to carry materials beyond the kerb. If you have specific access requirements, please contact us before placing your order.

Delivery exclusions

We currently do not deliver to the following postcode areas:

AB16, AB21–22, AB30–AB38, AB41–AB56, BT1–BT94, CA2, CA15, CA28, DD1, DD8, DD9, DG1, DG2, DG10–DG14, DG16, FK18–FK20, GY1–GY9, HS1–HS9, IM1–IM9, IV1–IV5, IV7, IV12–IV13, IV21–IV28, IV30–IV36, IV40–IV56, JE1–JE4, KA1, KA4–KA6, KA14–KA15, KA18–KA21, KA27–KA30, KW1–KW3, KW6–KW17, KY6–KY10, KY13–KY16, LL49, LL58–LL62, LL64–LL78, PA17–PA78, PH11, PH19–PH26, PH30–PH33, PH35–PH38, PH40–PH44, PH49–PH50, PO30–PO41, SA68, SA71, ZE1–ZE3

Important delivery terms

Shortages must be reported within 48 hours and noted on delivery paperwork
All deliveries must be signed for; redelivery charges may apply
Deferred deliveries may incur storage charges
Collected orders are not subject to delivery charges
Returns are subject to a 25% restocking fee (delivery charges excluded)
Made-to-measure items are non-refundable
Reasonable access to the delivery point must be available; additional charges may apply