Karndean Design Strip DS12-3-2.5 Concrete 3mm(w) x 2.5mm(t)

To complete the look of your Karndean floor, add a Karndean Concrete DS12 Design Strip. Place these between tiles to create a natural grouting effect or to enhance the design of your floor.

To calculate how many boxes of design strips you need for your floor, use this guide.

It's impossible to know the cost of a new floor without knowing how much of it you need. Unless you're a maths whizz, it can be pretty daunting to start measuring your room for laminate flooring, wood flooring or LVT flooring, so we have a simple method you can use.

How to measure your room example - simple room

If your room is a rectangle, this is as simple as measuring the length and width of your room and multiplying them together. Therefore if your room is 6 metres long and 3 metres wide, the area will be 18 metres square because 6 x 3 = 18

How to measure your room example - L-shaped room

If your room isn't rectangular, we recommend splitting it into rectangular sections. Multiply the width and length of each rectangle together to find the area. Then, add the areas of each rectangle together to find the total area. If you have an L shaped room, for example, this can be split into 2 rectangles.

How to measure your room example - complicated room layout

And if you've got a complicated room, this method still works. Simply split the room into as many rectangles as needed. Multiply the length and width of each rectangle to find the areas, then add them all together to find the total area. (Remember to jot down the measurements as you go along!)

Tip message to jot down measurements as you go along

Important tip

Important tip: it's standard to add an extra 5% on to your area to allow for the usual wastage that occurs during installation. To calculate this, you'll need to multiply the total area by 1.05. However, parquet and tiled floors where the installation starts in the middle of the room require 7-10% wastage as it's likely you'll have to cut more boards than with a regular, strait-lay design.

Measuring for Carpet

First, you'll need to measure the length & width of your room. You'll also need to allow for extra material for the installer to "cut in". When carpets are fitted, they need to run at least 5cm up each wall so they can be trimmed more accurately to fit against your skirting boards.

The most common widths for carpets are 4 & 5 metres. The width always refers to the width of the carpet, and the length is the other measurement, be it longer or shorter than the width. For example, if your room is 2.7 x 3.9 metres, you would opt for a 4-metre width carpet and purchase 2.75 metres in length, giving you 11m2 in total. If you want the design of your carpet to be in a lengthways direction, you'd need to purchase 4 metres of the 4-metre-wide carpet, giving you 16m2 in total.

Measuring Carpet for Stairs, Hallways & Landings

Draw a detailed plan of all of the flat areas involved, including any rooms that you intend to do in the same quality and colour as your hall, stairs and landing (HSL). Write each measurement against each wall.

Make a note of how many straight stairs you have and measure the width of these stairs. We recommend allowing 50cm extra in length for each straight step.

Make a note of any ½ landings, winders & kites that you may have (kites and winders are triangular-shaped stairs that create a curve in your staircase). Measure the length and width of each of these steps remembering that the length is the measurement that runs over the nose of the step and the width is the measurement running from side to side as you look up the staircase.

You'll need to decide whether to use 4.00 or 5.00-metre width carpet. Make sure you check which widths are available in your chosen carpet before you make this decision as you don't want to work it out in 5.00-metre width to realise your carpet only comes in 4.00-metre width!

Now the fun part! Draw a rectangle on your piece of paper and write the width at the top of the page and then try and fit all of the pieces that you need into that rectangle, ensuring that all of your relevant measurements will work within the space you have allowed. Diagram 1 shows an example of a HSL plan.

Remember, if you are carpeting some rooms in the same carpet that you intend to put on your stairs then you can use waste material from the rooms to use on the stairs, this may mean buying less carpet for your HSL.

Get the Perfect Fit—At the Best Price

Now that you’ve measured your space, it’s time to find the perfect flooring—without overpaying. With our Price Match Promise, you can be confident you’re getting the best deal. Found a lower price elsewhere? We’ll match it!

Measure once, shop smart, and let us handle the rest!

How using DivideBuy works

Step 1

Add items to
your basket

Step 2

Visit the checkout
& select DivideBuy

Step 3

Apply for credit in
less than 2 minutes

Step 4

Make initial
payment

Step 5

Order is processed
& goods dispatched

Frequently Asked Questions

Are there limits on how much I can spend?

DivideBuy credit can be used interest free up to 9 months for our flooring products between £900 and £6,000.

Over 12 months - Where interest free or interest bearing credit is available beyond 12 months, this limit is up to £12,500. Credit terms offered are set on an individual retailer basis.

Who can apply for DivideBuy interest free credit?

Applicants must be aged between 18 and 75
Be a permanent UK resident
Have a valid debit or credit card
Have a valid UK mobile number
Have a valid email address

Will a credit check be performed?

Yes. A credit check is performed to assess your eligibility during your application.

DivideBuy also has a quick check service which is available on this website so you can assess your eligibility for DivideBuy credit that will not affect your credit file.

How do I make my monthly payments?

Payment is collected via a Continuous Payment Authority (CPA). This method uses your long card number, expiry date and three-digit CV2. Payments will be collected automatically on the date your instalment is due.

Can I request delivery to an address other than my home address?

To guard against fraudulent applications, we are only able to deliver goods to your home address.

What if I would like to cancel/ return my order?

The first step is to contact the retailer directly to cancel your order. If you have already received your order, you'll need to arrange for it to be returned using the retailer's returns process. The retailer will then contact us to confirm your order has been returned, so we can issue a refund and cancel your credit agreement.

My application was declined. Now what?

We're sorry that your application has been declined. You have the right to appeal this decision, although there is no guarantee that the outcome will change. You can request an appeal by contacting us at: mailto:customerservice@dividebuy.co.uk. We may ask you to provide additional information to support your appeal.

You may also want to obtain a copy of your credit file before making any further applications. The credit reference agency we used for your Zopa Bank application are set out below.

TransUnion International Limited,
One Park Lane, Leeds,
West Yorkshire
LS3 1EP
www.transunion.co.uk

You can also find more information about how credit referencing works in our privacy notice at: https://www.dividebuy.co.uk/privacy-policy

Who can I contact if I need help?

For any questions related to DivideBuy interest free credit please contact DivideBuy by visiting https://www.dividebuy.co.uk. For a full list of FAQs please click here.

Are there any fees or charges?

There are no hidden charges.

Where an interest bearing credit product is selected, we will charge a fixed interest rate as part of the repayment instalments. This is explained by the following representative example:

Representative Example: Cash price of goods is £1,000.00 Initial payment of £55.65. Total amount of credit is £944.35. The total amount payable is £1,095.36, which includes £95.36 in interest at 13.90% fixed. The repayments comprise 16 monthly payments of £61.15 and a final payment of £61.31 at a representative 13.90% APR.

This is all explained in the documentation provided before you electronically sign at the checkout process.

How can I manage my DivideBuy account?

To manage your account and make payments, you can log in https://accounts.dividebuy.co.uk/

What if I need to change my delivery address from my billing address?

DivideBuy will need to approve any deliveries to addresses other than the application/billing address. Without their approval, we will not be able to ship to a different address as fraud prevention measures apply. To have goods delivered to another address, once you have placed your order and paid a first instalment, you need to contact DivideBuy directly who will then notify us of the changes.

How can I contact DivideBuy?

Email: hello@dividebuy.co.uk
or via the DivideBuy live chat facility at dividebuy.co.uk

Interest free credit agreements provided by Zopa Bank Limited trading as DivideBuy that are 12 months or less in duration are not regulated by the Financial Conduct Authority and do not fall under the jurisdiction of the Financial Ombudsman Service. Zopa Bank Limited trading as DivideBuy is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority, and entered on the Financial Services Register (800542). Zopa Bank Limited (10627575) is incorporated in England & Wales and has its registered office at: 1st Floor, Cottons Centre, Tooley Street, London, SE1 2QG. VAT Number 281765280. DivideBuy's trading address is First Floor, Brunswick Court, Brunswick Street, Newcastle-under-Lyme, ST5 1HH.

© Zopa Bank Limited 2024. All rights reserved.

Get 0% APR for 4 months when you spend £99 with PayPal Credit.

Offer available on single transactions of £99 or more, approval subject to age and status. Any remaining balance due after the 4-month promotional period will be charged at 23.9% p.a. (variable).

Representative 23.9% APR (variable)

Purchase rate 23.9% p.a (variable)

Assumed credit limit £1,200

Your actual interest rate and credit limit may vary depending on your individual circumstances.

Finance provided by PayPal Credit. Terms and conditions apply. Credit subject to status, UK residents only, Keswick Flooring Limited acts as a broker and offers finance from a restricted range of finance providers. PayPal Credit is a trading name of PayPal UK Ltd, Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH.

For more information, full terms and FAQs, please visit the PayPal Credit website

If you have any questions regarding finance, please call us.

Next-Day Delivery on Stocked Items

We now offer next-day delivery on all stocked items with a midday cut-off. This can be arranged over the phone during our working hours of 9 am to 5 pm Monday to Friday, or on selected products at checkout where next-day is specified. Orders under this value come with an additional cost depending on the size of your order. We understand that timely delivery is essential for our customers. Whether you're working on a renovation project or need a quick flooring solution, our team is ready to assist you and ensure your flooring arrives exactly when you need it.

How to arrange next-day-delivery

To take advantage of our next-day delivery service on stocked items, simply give us a call on 01842769333 to arrange. Our friendly and professional team will help you arrange the details and ensure your order is processed swiftly.

Postcode restrictions

Please note that our next-day delivery service is subject to postcode restrictions. Unfortunately, we are unable to offer next-day delivery to the following areas:

AB30-56 | BT | GY | HS | IM | IV4, 6-7, 11-40, 52-54, 57+ | JE, KA27-28 | KW1-14 | KW15-17 | PA20+ | PH8-13, 15+ | PH36-44 | PO30-41 | ZE | ROI

If your delivery address falls within one of these postcode areas, please contact us to discuss alternative delivery options.

Kerbside Delivery

Placing your order

At checkout, you can choose a delivery date on any weekday. Delivery dates start four working days from your order date. We will ask you to add a mobile number when placing your order so we can contact you about your delivery.

Due to stock availability, some products may have longer lead times. We will email you if your order is affected.

Tracking your delivery

You'll receive an email and SMS before your delivery. They'll confirm that your order has been accepted and dispatched.

On the day of your delivery

You'll receive a text confirming your order is out for delivery between 9 am and 5 pm. The delivery driver will contact you with an estimated delivery time when they are on their way.

Service	Price	Details
Kerbside Delivery Mon-Fri	Free on orders over £499, or £40 (incl. VAT)	Our courier will place the pallet on the kerbside at the nearest access point to your delivery address. A signature will be required, so please make sure someone is in. We will send an SMS confirmation once your new flooring delivery is complete.

Service

Price

Details

Kerbside Delivery

Mon-Fri

Free on orders over £499, or £40 (incl. VAT)

Our courier will place the pallet on the kerbside at the nearest access point to your delivery address. A signature will be required, so please make sure someone is in. We will send an SMS confirmation once your new flooring delivery is complete.

For information on express delivery, please call 01842 769333, get in touch on live chat or email us at sales@flooringsupplies.co.uk. Service is dependent on delivery location.

Delivery to Remote Areas

We cannot provide an estimated delivery time for properties in remote areas. Our courier will place the pallet on the kerbside at the nearest access point to your delivery address. A signature will be required, so please make sure someone is in.

We can deliver to Northern Ireland and other remote areas for an extra fee. These include postcodes PO30 – PO40, PA20 – PA78, PH, IV, KW, ZE, HS, GY, and JE.

Packages Under 50kg

For packages under 50kg, we offer light delivery to your door from 8 am to 6 pm. You'll receive an email and SMS to confirm a four-hour delivery slot.

Our light parcel delivery has access restrictions. For properties with steps or stairs or flats above the ground floor doorstep, we'll leave your order on the ground floor.

Service	Price	Details
Light parcel	£10 (Mon-Fri) £15 (Sat)	Delivery to your doorstep on the day of your choice (Monday to Saturday between 8am and 6pm)
Light parcel AM	£15 (Mon-Fri) £20 (Sat)	Delivery to your doorstep on the morning of your choice (Monday to Saturday between 8am and 1pm)

Service

Price

Details

Light parcel

£10 (Mon-Fri)

£15 (Sat)

Delivery to your doorstep on the day of your choice (Monday to Saturday between 8am and 6pm)

Light parcel AM

£15 (Mon-Fri)

£20 (Sat)

Delivery to your doorstep on the morning of your choice (Monday to Saturday between 8am and 1pm)

Delivery Terms and Conditions

Standard deliveries are kerbside (you'll need to carry goods into your property) and can be made on anything from a van to an 18 tonne lorry, so it is assumed that the delivery address will be easily accessible for any large vehicle. Please be aware most of our shipments will be on a pallet and this will be left with you at the point of delivery. If access is likely to be a problem please inform us at the time of order to discuss alternative delivery options.

We strongly advise against booking installers until goods have been received and checked as, regrettably, we cannot be held responsible for any consequential losses.

Your new flooring should also be given time to acclimatise.

Failed Deliveries

If your order arrives as arranged but we're unable to deliver because there's nobody home, the goods are refused, there's inadequate help available, or the order is requested to be changed/cancelled within 48 hours of your delivery (excluding weekends), you will be liable for any additional costs incurred for the goods being returned, or the goods being redelivered.

If after a failed delivery you do not re-arrange delivery, we will contact you for further instructions and may charge you for storage costs and any further delivery costs. If, despite our reasonable efforts, we are unable to contact you or re-arrange delivery we may end the contract.

Order not as expected

It is important to check the packages for any visual damage to the goods. In the rare event that you receive damaged goods or there are missing items, please make sure it is noted on the courier's paperwork. If you are not able to inspect the goods at the point of delivery, we strongly suggest that you contact us directly as soon as possible to make sure we are aware of the problem so that we can resolve it swiftly.

	Knight Tile Delivers stunning wood and stone contemporary designs at entry-level prices	Van Gogh A rich selection of oak, cedar, and redwood finishes. From sleek neutrals and bold, dark rustic woods to cool, calming stone textures, this mid-price collection has something for every style.	Art Select The ultimate collection featuring handcrafted designs inspired by the finest wood and stone. With unique embossing, distinct bevelled edges, and captivating textures, it showcases the peak of design excellence.
Thickness	Gluedown: 2.0mm Rigid Core: 4.5mm	Gluedown: 3.0mm Rigid Core: 5.5mm / 6.5mm	Gluedown: 3.0mm
Wear Layer	0.30mm	0.55m	0.70mm
Slip Rating	R10	R10	up to R11
Embossed
Bevel		Micro	Standard
Registered Emboss		* Selected lines only.	* Selected lines only.
Handscraped Finish			* Selected lines only.
Price Range	£ - Entry range	££ - Mid range	£££ - Premium range

Thickness	Gluedown: 2.0mm Rigid Core: 4.5mm
Wear Layer	0.30mm
Slip Rating	R10
Embossed
Bevel
Registered Emboss
Handscraped Finish
Price Range	£ - Entry range

Thickness	Gluedown: 3.0mm Rigid Core: 5.5mm / 6.5mm
Wear Layer	0.55m
Slip Rating	R10
Embossed
Bevel	Micro
Registered Emboss	* Selected lines only.
Handscraped Finish
Price Range	££ - Mid range

Thickness	Gluedown: 3.0mm
Wear Layer	0.70mm
Slip Rating	up to R11
Embossed
Bevel	Standard
Registered Emboss	* Selected lines only.
Handscraped Finish	* Selected lines only.
Price Range	£££ - Premium range

Karndean Design Strip DS12-3-2.5 Concrete 3mm(w) x 2.5mm(t)

Description

Compare Karndean Ranges

Knight Tile

Van Gogh

Art Select

Specifications

Reviews

Important tip

Measuring for Carpet

Measuring Carpet for Stairs, Hallways & Landings

Get the Perfect Fit—At the Best Price

How can I contact DivideBuy?

Next-Day Delivery on Stocked Items

How to arrange next-day-delivery

Postcode restrictions

Kerbside Delivery

Placing your order

Tracking your delivery

On the day of your delivery

Delivery to Remote Areas

Packages Under 50kg

Delivery Terms and Conditions

Failed Deliveries

Order not as expected