Roof ventilation plays a crucial role in maintaining a healthy and functional living space. Proper ventilation helps combat issues like condensation build-up, promoting the longevity of the roof structure and creating a more comfortable environment. When it comes to what you can do to combat condensation in your roof space, two prominent players stand out: the Manthorpe G630 and the Timloc 5560 felt lap vents. In this article, we'll delve into the benefits, and efficiency of each product, shedding light on their features and importance to your roof.

The Manthorpe G630 felt lap vent is a product designed to increase the amount of ventilation into existing roof spaces. With joist centres ranging from 400mm, it is versatile and can be easily fitted retrospectively to properties with varying roof structures.
Key Features
Tapered Lead Compatibility: An outstanding feature of the Timloc 5560 is its compatibility with tapered lead. This design allows for a seamless fit with the tapered lead edge of the felt, ensuring a snug and efficient ventilation solution for the roof space.
Easy Integration with Loft Insulation: The Timloc 5560 is designed to work harmoniously with additional loft insulation. This makes it a suitable choice for properties that have recently undergone insulation upgrades, as it seamlessly integrates into spaces with enhanced insulation properties.
Efficiency in Combatting Condensation: The vent's placement and design effectively combat the problem of condensation build-up at the edge of the felt. This is crucial for maintaining the integrity of the roof structure and preventing long-term damage.
Efficient Design: The G630 is engineered to combat the problem of condensation build-up by providing effective airflow through the lapped felt membrane construction. Its design ensures that the edge of the felt remains well-ventilated, preventing moisture-related issues.
Easy Installation: One of the standout features of the Manthorpe G630 is its user-friendly installation process. Felt clips help secure the vent in place, making it easy to fit and ensuring a secure attachment to the roof structure. This simplicity in installation makes it an attractive option for both DIY enthusiasts and roofing professionals.

On the other side of the spectrum, the Timloc 5560 felt lap vent offers its own set of features and benefits tailored to the needs of lapped felt membrane construction.
Key Features
Tapered Lead Compatibility: An outstanding feature of the Timloc 5560 is its compatibility with tapered lead. This design allows for a seamless fit with the tapered lead edge of the felt, ensuring a snug and efficient ventilation solution for the roof space.
Easy Integration with Loft Insulation: The Timloc 5560 is designed to work harmoniously with additional loft insulation. This makes it a suitable choice for properties that have recently undergone insulation upgrades, as it seamlessly integrates into spaces with enhanced insulation properties.
Efficiency in Combatting Condensation: The vent's placement and design effectively combat the problem of condensation build-up at the edge of the felt. This is crucial for maintaining the integrity of the roof structure and preventing long-term damage.
Comparative Analysis
Installation Process: Both vents boast an easy installation process, thanks to the incorporation of felt clips.
Ventilation Efficiency: Both vents are designed to combat condensation issues effectively. The choice between the two depends on the the preferences of the installer due to them both allowing the same amount of airflow if used correctly. The difference between standard ventilation and using felt lap vents Ventilation of the roof built into your home would have been sufficient during construction.
However, if you add something that may cool the surface of the loft (such as adding more insulation ) or if you reduce the efficiency of existing ventilation (partially or completely block existing vents), which people think are outdated, we need to think again. Make sure the existing vents are not blocked.
Common things that can increase the risk of condensation in the loft:
- Placing insulation on top of the existing vents.
- The water tank inside the loft is hot and water vapour enters the loft (this is the job
- of the plumber).
- Excessive water vapour from your home rises into the attic. Perhaps through a gap around a light, toilet, loft hatch.
- An Increased insulation level of the attic without providing extra ceiling ventilation.
When it comes to you having condensation in your roof space, the Manthorpe G630 and Timloc 5560 emerge as reliable solutions, each with its unique set of features. Both vents offer efficient solutions to enhance roof ventilation and combat condensation-related issues. Ultimately, the choice between the two will depend on the preferences of the installer and your budget.
If you have condensation in your roof space and are looking for a fix, then here at Ashbrook Roofing Supplies we supply both the Manthorpe G630 and the Timloc 5560 Felt Lap Vent. You can get them here: Loft Vents | Ashbrook Roofing Supplies
Alternatively, if you are after more information then you can visit our Felt Lap Vent Information Page, Which has more information on felt lap vents, the amount of felt lap vents you need and also an installation video on "how to fit felt lap vents"
If you need any further advice on felt lap vents, condensation or roofing supplies in general, please contact us on 01629732988 or emails us at sales@ashbrookroofing.co.uk and we will be happy to help.