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Cavitytherm Full Full Cavity Wall Insulation
Product Code
var_ctpircwall-C
Cavitytherm Full Fill Cavity Wall 100mm (2.16 M2)
From €86.95 €70.69
/ Price Per ITEM
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CT/PIR
CavityTherm is an innovative built-in insulation for traditional walls that achieves passive level U-Values as low as 0.12 W/m2K with excellent thermal bridging detailing in cavities less than 150mm wide.
CavityTherm provides a ‘system’ that delivers on U-values, is practical, and with a full range of innovative detailing accessories – it delivers on continuity.
CavityTherm (Inner block 100)
Block Type 100mm 125mm 150mm
Light 0.15 0.18 0.15 0.12
Med 0.33 0.19 0.15 0.13
Dense 1.15 0.20 0.16 0.13
Property & Units
Water Vapour Resistivity >100 (MNs/gm)
Thermal Conductivity 0.021 (W/mK)
Service Temperature -20 to +100 (°C)
CavityTherm
Length (mm) 1200 - -
Width (mm) 450 - -
Thickness (mm) 100 125 150
Typical R-Value* 4.52 5.71 6.90
*PIR Only
Key Points
Engineered HIPs facer provides wind driven rain protection
Moisture redirected to outer surface
Prepositioned slots for sloping wall ties - no creep
Fully engineered jointing
Full range of accessory pieces build continuous system
Excellent Thermal Bridging Values.
| Barcode | 5055306406242 |
|---|---|
| Brand | Xtratherm |
| Weight | 1.0000 |
| Provided by | TJ O'Mahony |
| Delivery Rule | large & heavy |
Last update: 02-Dec-2025
Delivery Timeframes:
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Small Items: 2-3 working days
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Large/ Bulky items: 5-7 working days
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Extra Large appliances & TV's: 5-7 working days
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Click & Collect: 1 working day
Delivery Zones (Nationwide):
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Zone 1: Dublin, Galway, Kildare, Limerick, Meath, Offaly, Tipperary, Wexford, Wicklow
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Zone 2: Carlow, Clare, Clifden, Kilkenny, Laois, Louth, Waterford, Westmeath
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Zone 3: Cavan, Cork, Donegal, Kerry, Leitrim, Longford, Mayo, Monaghan, Roscommon, Sligo
Delivery Charges:
| Small & Light | Large & bulky | Extra Large | |
| Zone 1 | €9.99 | €25 | €50 |
| Free delivery on orders over €400 | no free delivery | ||
| Zone 2 | €9.99 | €50 | €50 |
| Zone 3 | €9.99 | N/A | N/A |
* Effective from 3 December 2025
* Free delivery on order over €400, applies to Small & Light, Large & Heavy items within zone 1 only.
Zone Indicator:
To help you understand delivery availability, every item displays a zone icon, icons appear on the top-right corner of each product image:
| Types of goods | Available zones | Descriptions |
| Small & light items | All Zone area | Items under 20kg weight & under 2m long, (some fragile items may not be included e.g. glass/mirrors) |
| Large and bulky items Extra Large items |
Zone 1 & 2 only | Wet & hazardous bagged, items over 20Kg weight & oversized; Euronics white goods, TVs of all sizes. |
| Large Paint items (6L / 6L+) | Zone 1 only | Large hazardous items (6L+) - available for collection |
| Available zones | Indicator | Descriptions |
| All zone area |  |
This icon with all zone area in green, indicates this items can be shipped to all Zone. |
| Zone 1 & 2 only | |
Zone 1 & 2 in green and zone 3 greyed out, indicates this product can only be shipped to Zone 1 and 2 |
| Zone 1 only | |
Zone 1 in green zone 2 and zone 3 are greyed out, indicates this product can only be shipped to Zone 1 only. |
Old Appliance Collection:
When you buy a large appliance, we’ll collect your old one for free through WEEE Ireland. Please ensure it is uninstalled, disconnected, and ready for pickup. Collection is like-for-like and takes place at the front door or apartment entrance. Restrictions may apply based on access and item type.
Free Click & Collect:
Click & Collect is free and available on items in stock at your chosen branch. Click Here to see our Branch Locator.
How it works:
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Place your order online
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You will receive an order confirmation email
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Our team processes your order, please allow up to 4 hours
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Within branch opening hours, we aim to have your order ready the same day.
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You will receive an email once your order is ready for collection.
At TJ O'Mahony we will exchange or refund any Retail unused product returned to us in its original condition within 30 days of receiving it (*)You can return any unused product to us in its original condition for a full refund or exchange within 30 days of delivery.
This right to return does not apply to products that are non stock and only available to order such as catalogued doors, catalogued bathroomware and mixed paints which are made especially for your order.
Please note that we are unable to accept returns on certain bagged building products and materials, including (but not limited to) hard wall, cement, bonding, slates, and ridges. We appreciate your understanding and recommend checking product requirements carefully before purchase.
*View our full returns policy on our Terms &Conditions Page.