An image of the Timloc 5560 Felt Lap Vent which is white in colour.

An image of what the felt lap vents look like when installed into a loft space onto the felt laps.

An image that is a drawing of the Timloc left lap vents with the dimensions from head on and side profiles.

Timloc 5560 Felt Lap Vents

Name: Timloc 5560 Felt Lap Vents
Brand: Timloc
SKU: TL-FELTLAPVENT/10
Price: 16.28 GBP
Availability: InStock
Rating: 4.72 (18 reviews)

by Timloc

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£16.28 - £230.00

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British manufacturer supplying the building industry for almost 60 years

Timloc Felt Lap Vents

Attic or loft condensation is normally spotted either in the winter months, or after installing new loft insulation.

All homes generate moisture from everyday activities like cooking and showering. When this moisture condenses in a cold loft it can eventually lead to costly problems like rotten roof timber.

Condensation in the loft is usually caused by inadequate ventilation. This can often be remedied quickly and easily if your loft has traditional lapped membrane or roofing felt behind the tiles.

The Felt Lap Vents are fitted inside the loft by simply clipping individual vents onto the edges of the felt or membrane close to the eaves.
Each felt lap vent creates an air gap delivering up to 3000mm2/m of ventilating airflow. When combined with existing roof space ventilation, fitting evenly spaced lap vents on both sides of the loft will fix most loft condensation problems.

Features and Benefits

To increase the level of ventilation in a roof space by separating lap joints in the roofing felt/membrane.
Remedial solution for combating condensation in cold roof voids
Can be fitted retrospectively after increased loft insulation
Discrete profile design
Easy installation
2 spring clips to secure each unit in place Technical Information
3000mm2 additional free vent area per unit
Suitable for rafter spacings from 400-600mm centres
Designed only to enhance existing ventilation via felt/membrane lap joints
Pack of 10 or 150
Consideration must be given to increased risk of wind uplift and driving rain resistance outlined in BS5534:2014
Dimensions - 280mm Length, 205mm Width, 19mm Depth

Quality

Manufactured to British Standards: BS EN 9001 and BS EN 14001

Material and Colour Choice

Injection Moulded recycled Polypropylene
White

How Many Vents Do I Need?

The number of felt lap vents can be worked out using the following formula:

Selecting the amount of airflow, then dividing the roof length by the spacing (in meters) indicated below.

Free Flowing Airflow	Felt Lap Spacings
	Millimetres	Meters
5000mm/m ²	600	0.6
10000mm/m ²	300	0.3
15000mm/m ²	120	0.12

For Example:

For a roof that is 7m requires airflow of 10000mm/m ²

7/0.3 = 23.333 or 24 felt lap vents evenly spaced.

For roof spaces that require more than the 15000mm/m ² the spacings half for each additional 5000mm/m ²

Buyer Notes

Product Datasheet

Please note these are designed as a remedial solution to roof ventilation and do not meet the standards for permanent roof space ventilation on their own and felt lap vents may adversely affect wind uplift of slates and tiles. For more information, please see our blog on the changes to BS 5534:2014 or see BS 5250 Code of Practice for Control of Condensation in Buildings.

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Why Choose Timloc?

Timloc Building Products has been serving the building industry for almost 60 years. Part of Alumasc Group Plc, we are based at our 90,000 sq. ft. manufacturing facility in Howden, East Yorkshire.

They are extremely proud to be a British Manufacturer at our state-of-the-art facility based in East Yorkshire. They understand the needs of their customers and have established an excellent reputation for consistently delivering quality products.

They are committed to sustainable manufacturing and 75% of products are made from recycled plastics. Their products are designed for use throughout the lifespan of a building and are recyclable at the end of the building life.

Felt Lap Vent Installation Guide

How Timloc are committed to sustainability

We are proud to manufacture products that are made to last and 75% of our products are made recycled plastics. Our products are designed for use throughout the lifespan of a building.

At Timloc Building Products, we take our responsibility for the environment very seriously and are committed to making positive steps to help reduce plastic waste within the building industry. In 2021, Timloc Building Products became the first carbon neutral building products manufacturer in the UK.

We are proud to manufacture products that are made to last and are made predominantly from recycled plastics. 75% of the products we manufacture are made from recycled materials. Our products are designed for use throughout the lifespan of a home and are recyclable at the end of the building life.

We have implemented a circular economy for the production and consumption of many Timloc products. This regenerative system means recycled materials are being used to make recyclable products.

In January 2021, Timloc became the first building products manufacturer to use electricity generated from 100% renewable sources. In addition 100% of our waste is diverted from land fill and we use 100% recyclable packaging. To find out more about the positive steps Timloc have taken and how we are helping to deliver a sustainable future for the housebuilding industry, view our Sustainability brochure here.