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Keystone BOX/K-100 Solid Wall Box Lintel 3750mm INS

SKU

KBX1375INS

£244.08 £203.40

Product Information

Keystone BOX/K-100 insulated box lintel, 3750mm (12ft 4in) length for solid walls
Designed for 100-215mm wide solid walls, ideal for internal openings
Enhanced thermal insulation built-in for better energy efficiency
Supports full wet masonry load immediately upon installation
Must be bedded on mortar with minimum 150mm bearing each side; lintels are recommended to be propped during construction

Details

The Keystone BOX/K-100 Solid Wall Box Lintel 3750mm INS is engineered specifically for trade professionals working with 100mm thick solid walls. Featuring integrated insulation, this lintel improves thermal performance without compromising structural reliability, making it an excellent choice for internal openings on serious building projects. Please note that lintels require correct installation practices for optimal performance.

Application

This insulated box lintel is used to support standard load internal openings in solid masonry walls ranging from 100mm to 215mm in thickness. It is designed to carry the full wet masonry load immediately, speeding up construction timelines. Ideal for builders and site managers working on residential or commercial projects requiring durable, thermally efficient lintels.

Dimension

Length: 3750mm (12ft 4in)
Height: 215mm
Width: 95mm

Material

Steel box lintel with integrated insulation for enhanced thermal performance

Type

Box lintel – designed for solid walls
Standard duty load-bearing lintel with insulation ('INS' version)

Important installation notes: The lintel must have a minimum end bearing of 150mm on each side, properly bedded on mortar. It is also recommended to prop lintels during construction to ensure stability and speed up the build process.

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	3750mm
Weight	49.010000
Manufacturer	Keystone
Sap Id	KBX1375INS

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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