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100mm XT/CL Close-R PIR Cavity Closer Flanged Fit (pack of 6)

100mm XT/CL Close-R PIR Cavity Closer Flanged Fit (pack of 6)
100mm XT/CL Close-R PIR Cavity Closer Flanged Fit (pack of 6)
100mm XT/CL Close-R PIR Cavity Closer Flanged Fit (pack of 6)
100mm XT/CL Close-R PIR Cavity Closer Flanged Fit (pack of 6)
100mm XT/CL Close-R PIR Cavity Closer Flanged Fit (pack of 6)
  • 100mm Unilin XT/CL Close-R PIR Insulated Cavity Closer Flanged Fit
  • Flanged fit (Concrete Outer) Cavity Closer used for closing the cavities
  • XT/CL Close-R is used around window and door openings
  • Close-R is preventing cold bridging, damp penetration and condensation
  • Suites 100 - 150mm cavities - meets Building Regulations requirements
Estimated delivery:
In Stock
£ 129.60
Ex VAT: £ 108.00
  • Brand: Unilin Insulation (UK) known as Xtratherm
  • Model: 100mm Cavity Closer Flanged Fit
  • Weight: 18.00kg
  • Dimensions: 2,400mm x 25mm x 100mm
  • SKU: 100mm Cavity Closer Flanged Fit
  • Product code: P1-3439
  • MPN: 100mm Cavity Closer Flanged Fit

Options available

100mm XT/CL Close-R Flanged fit (Concrete Outer) is a cavity closer used for closing the cavities around window and door openings, preventing cold bridging, damp penetration and condensation.

Unilin Close-R XT/CL Reveal Closers range is used to close cavities and is suited to all types of windows and doors and is available in sizes to fit cavity widths from 100mm - 150mm.

Insulated Cavity Closer Close-R has been independently tested to exceed the new standards in recently revised Building Regulations on detailing at junctions.

Targets for junction thermal performance are set in the BRE Paper IP1/06 and asks that a value of 0.05 be achieved.

In the past where a typical wall U-Value was between 0.37 and 0.27, the 0.05 target was easily achieved using the traditional 25mm strip at the reveal.

However when pushing the wall U-Values to ‘A or B’ rated values the junctions actually fail IP1/06.




Thickness: 100mm

Width: 25mm

Length: 2400mm

Size: 100mm x 25mm x 2400mm

Pack Quantity: 6 closers

Pack Coverage: 1.44m2

Board Coverage: 0.24m2

Profile: Flanged Fit

R-Value: 4.50 m2K/W

Density (Foam Core): 32kg/m3 

Thermal Conductivity: 0.022 W/mK

Compressive Strength: >120 (kPa)

Reaction to Fire: Euroclass E


Unilin Close-R Cavity Closer Features:

 · Saves time.

 · Cost effective.

 · Suites 100 - 150mm cavities.

 · Suited to all types of windows and doors.

 · Meets new updated building regulations requirements.

 · Preventing cold bridging, damp penetration and condensation.


Unilin Close-R Insulated Cavity Closer Installation Guidelines:

 · If precise fitting of windows can not be guaranteed, a checked reveal using a vertical DPC should be used.

 · Any jointing of Close-R should be facilitated within 150mm of the opening head.

 · Close-R should be extended by 50mm past the sill closer.

 · When sills are horned into the facing outer leaf, the reveal Close-R should be trimmed around the concrete sill and extend 50mm into the cavity.

 · Horizontal DPCs should be used with the sill as normal, with a lining of 40mm Polyiso placed at the back of the concrete sill.

 · Flanged fit (Concrete Outer) method requires precise construction to facilitate accurate window fitting against Close-R.


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet 

*Special Product - Non returnable cancelable.

Board covarage 1.44 m2
Colour Light yellow
Density 32 Kg/m3
Length 2400mm
Material PVC-U Outer Profile with PIR core
Pack Coverage 1.44m2
Pack Quantity 6 closers
Profile Flanged Fit (Concrete Outer)
R-Value 4.50 m2K/W
Size 100mm x 25mm x 2400mm
Thermal Conductivity 0.022 W/mK
Thickness 100mm
Width 25mm
Fire Reaction Euroclass E
Coverage 0.24m2
Finish PVC-U Outer Profile
Quantity 6 cavity closers
Shipping method Articulated Vehicle ǀ Courier
Applications Cavity Walls
BBA Certified Yes (No. 12/4956)
Fixing method Mortar, Cavity Wall Ties
Foil faced Yes, foil facings on both sides
ETA Notification Yes
U-value 0.11 - 0.20 W/m²K
Features Meets new updated building regulations requirements
Manufacturer Unilin Insulation®

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We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
100mm XT/CL Close-R PIR Cavity Closer Flanged Fit (pack of 6)
100mm XT/CL Close-R PIR Cavity Closer Flanged Fit (pack of 6)
£ 129.60