Skip to the beginning of the images gallery

Keystone BOX/K-200 Solid Wall Box Lintel 3900mm INS

SKU

KBX239INS

£292.84 £244.03

Product Information

Keystone BOX/K-200 Solid Wall Box Lintel with insulation, 3900mm (12ft 9in) length.
Designed for solid walls 100-215mm thick, supporting internal openings with a standard duty load.
Includes integral insulation for improved thermal efficiency on site.
Perforated design provides a secure plaster key for finishing.
Must be installed with a minimum 150mm end bearing on mortar; propping recommended for faster build times.

Details

The Keystone BOX/K-200 Solid Wall Box Lintel 3900mm INS is a specialist structural lintel designed for builders and contractors working with solid masonry walls between 100mm and 215mm thick. Featuring built-in insulation, this lintel offers enhanced thermal performance without compromising strength, making it a reliable choice for internal openings on serious projects. Please note that this lintel must be bedded on mortar with a minimum 150mm bearing on each side and propped during construction for optimal results.

Application

Specifically engineered for use in solid wall construction, the Keystone BOX/K-200 lintel supports the full load of wet masonry immediately after installation. Ideal for internal openings such as doorways and window spaces, it provides a robust, standard duty support solution for projects requiring reliable structural integrity and improved energy efficiency thanks to the integral insulation. This lintel is a trusted choice for site managers and tradespeople aiming to meet building regulations and maintain build speed.

Dimension

Length: 3900mm (12ft 9in)
Height: 150mm (6in)
Width: 200mm (8in)
Suitable for wall thicknesses ranging from 100mm to 215mm

Material

Steel with integrated insulation for thermal efficiency
Perforated design for better plaster adhesion

Type

Box lintel for solid walls
Standard duty structural lintel

More Information

More Information
Type	Box Lintels
Loading	Standard Duty
Length	3900mm
Weight	55.340000
Manufacturer	Keystone
Sap Id	KBX239INS

Customer Reviews

No reviews yet on this product

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