Heavyshield 120gsm is a breathable roof tile underlay for pitched roofs and wall applications. The 1.5m x 50m roll is lightweight to handle on site while providing resistance to water penetration and allowing water vapour to pass through the membrane.
It is intended for use as part of a correctly detailed roof or wall build-up, with laps, eaves, penetrations and ventilation completed in accordance with the installation guidance.
Key Features
120gsm breathable membrane for pitched roof and wall applications.
Resists water penetration while allowing water vapour transmission.
Lightweight roll format helps with handling and installation.
CE certified to the applicable flexible-sheet underlay standards.
Technical Information
Product type: Breathable roof tile underlay
Roll width: 1.5m
Roll length: 50m
Mass per unit area: 120g/m²
Suitable applications: Pitched roofs and walls
Water performance: Resistant to water penetration
Vapour performance: Breathable with water vapour transmission
CE certification: Yes
Standard: EN 13859-1:2010
Standard: EN 13859-2:2010
Installation orientation: Coloured side facing upwards
Please Note
Follow the specified lap, eaves, penetration and ventilation details for the roof construction. Cover the membrane with the permanent roof covering as soon as practicable.
We offer reliable delivery services throughout the Republic of Ireland, with straightforward delivery charges for both trade and DIY customers. Delivery options are confirmed at checkout based on your order and delivery Eircode.
Delivery Charges & Delivery Times
Delivery Type
Delivery Area
Delivery Charge
Delivery Time
Small Items
Republic of Ireland
€9.99
3–4 working days
Large & Heavy*
Standard delivery area
€29.99
5–7 working days
Extra Large*
Standard delivery area
€50.00
5–7 working days
Paint 5L or less**
Standard delivery area
€19.99
5–7 working days
Swipe sideways to compare delivery options.
Small Items
Delivery area
Republic of Ireland
Charge
€9.99
Delivery time
3–4 working days
Large & Heavy*
Delivery area
Standard delivery area
Charge
€29.99
Delivery time
5–7 working days
Extra Large*
Delivery area
Standard delivery area
Charge
€50.00
Delivery time
5–7 working days
Paint 5L or less**
Delivery area
Standard delivery area
Charge
€19.99
Delivery time
5–7 working days
*Standard delivery policy. Promotional delivery rates may apply during campaigns.
Additional Information
FREE delivery on eligible Small Items and Large & Heavy orders over €1,499, within the standard delivery area only.
Special Order and Catalogue Products require an additional 5 working days.
FREE collection of old appliances is available through WEEE Ireland when purchasing qualifying large appliances.
FREE Click & Collect is available for items in stock at your selected branch.
Large & Heavy and Extra Large items are available within our standard delivery area only.
Paint delivery Paint in tin cans 5L or less is available for delivery. Larger sizes and paint supplied in plastic buckets are available for Click & Collect only.
TJ O'Mahony offers a 30-day returns policy on eligible unused products, giving you additional time beyond the statutory 14-day cooling-off period applicable to most online consumer purchases.
Eligible products can be returned for a refund or exchange within 30 days of delivery or collection, provided they are unused, in their original and re-saleable condition, complete with all supplied parts and accessories, and accompanied by proof of purchase.
Please note: Return restrictions apply to certain products, including Mixed Paint, certain Bagged Building Products, Solid Fuel, Special Order, Non-Stock and Catalogued Products.
Your statutory rights in relation to faulty, damaged, incorrectly supplied or non-conforming goods are not affected.
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