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View Product Reviews125mu (500G) Green Vapour Barrier 4m x 50m (200m2/Roll)
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Nationwide Delivery
Tue 20 May
- 0days
- 5hrs
- 24mins
- 35secs
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Split your purchase of £74.99 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
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- Choose Clearpay at checkout to pay later with Pay in 4.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
Product Overview
Klarna's Pay in 3 / Pay in 30 days are unregulated credit agreements. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Late fees may apply. Ts&Cs apply
Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/apply
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Delivery & Returns Information
All delivery charges are shown in your basket and are dependent on the total value of items in your basket based on product category.
This charge is based on delivery to mainland UK excluding the following postcodes: AB, CF, DD, DG, KW, IV, LD, LL, NP, PH, SA and SY. If your delivery address is in any of these postcode areas a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £150 | £50 ex. VAT |
| Between £150 - £400 ex. VAT | £35 ex. VAT |
| Over £400 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £25 ex. VAT |
| Between £100 - £250 ex. VAT | £20 ex. VAT |
| Over £250 ex. VAT | FREE |
| SuperFOIL and YBS products | |
| ORDER VALUE | DELIVERY CHARGE |
| Each item | £10 ex. VAT |
| Over £350 ex. VAT of 1 brand | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £7.50 ex. VAT |
| Over £100 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{air}} Prevents condensation within the building structure
- {{remove_moderator}} Helps to prevent mould and damp staining
Technical Specification
| Gauge: | 500 |
|---|---|
| Thickness: | 125mu |
| Width: | 4m |
| Length: | 50m |
| Sales Unit: | Roll |
| Sales Unit Coverage: | 200m2 |
Technical Downloads
What is 125mu (500G) Green Vapour Barrier 4m x 50m?
125mu (500G) Green Vapour Barrier (4m x 50m) is a highly effective vapour barrier designed to control moisture and enhance the thermal performance of building structures. Constructed from durable polyethylene (PE) or similar polymer materials, this vapour barrier serves as an essential component in preventing the infiltration of water vapour into the building envelope, thereby safeguarding the integrity of the structure and its associated materials.
Its primary function is to mitigate the risks associated with interstitial condensation, mould, damp, and the degradation of insulation materials, all of which can compromise the energy efficiency and overall durability of a building.
Where Should a Vapour Barrier Be Placed?
The placement of a vapour barrier within a building is critical to its effectiveness. Unlike a breathable membrane (which tends to be fixed on the cold side of insulation), a vapour barrier is positioned on the warm side of the insulation, which is generally the interior side of walls, floors, and ceilings.
This strategic positioning prevents warm, moisture-laden air from coming into direct contact with cooler surfaces, where it could condense, potentially causing damage to building materials and compromising thermal performance.
Essentially, vapour barriers act as a physical barrier, restricting the movement of water vapour into the colder parts of the building fabric. This helps reduce the likelihood of condensation within the structure, which could otherwise lead to rot, mould growth, and other forms of material degradation.
125mu (500G) Green Vapour Barrier Benefits
- Prevention of Interstitial Condensation: The barrier effectively limits the passage of warm, moist air into the building fabric, thereby mitigating the formation of condensation within the structure. This is particularly important in maintaining the integrity of the insulation material and the overall building structure.
- Moisture Control: By restricting the movement of water vapour, the vapour barrier prevents the buildup of excess moisture in the building, which could otherwise lead to issues such as mould growth, damp staining, and degradation of building materials.
- Enhanced Energy Efficiency: As a key component in reducing heat loss and improving thermal performance, the vapour barrier helps maintain the effectiveness of insulation materials, ensuring that the building remains energy-efficient and cost-effective in both warm and cold climates.
125mu (500G) Green Vapour Barrier Specifications
- Vapour resistance of 266 MNs/g
- 500gauge/125Mu
Is a Vapour Barrier Really Necessary?
A vapour barrier is a critical component in maintaining a building's structural integrity and energy efficiency. Water vapour is an inherent byproduct of human activities such as cooking, bathing, and even breathing.
If left unchecked, this moisture can migrate through the building envelope, leading to interstitial condensation within walls, roofs, and floors. This form of condensation can significantly degrade the performance of insulation, reducing its ability to resist heat loss and thereby impacting the overall thermal performance of the building.
Moreover, excess moisture in the structure increases the risk of mould and damp issues, which can lead to poor indoor air quality and potential health concerns for occupants.
Vapour Barriers Vs Vapour Control Layers
Vapour control layers are designed to 'control' and slow moisture penetration, as opposed to blocking it completely. A vapour control layer (otherwise known as a vapour retarder) is airtight in its design and because of this is typically employed in areas where airtightness is a concern, with some common forms incorporating a self-adhesive design. When utilised in a roof space, VCL is usually employed alongside a breather membrane to stimulate air flow.
Vapour barriers, on the other hand, serve as an 'air barrier' that fully obstructs the movement of vapour and air. The most common form of vapour barriers are polythene sheets or foil-backed insulation with taped joints.
