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Manthorpe Small Format Inline Slate Vent - 520 x 350mm (Pack of 10)

Special Price £233.88 £128.51 PER M² Regular Price £286.38
This is the earliest delivery time for this product. Please select your options from the dropdowns (i.e. size, thickness, colour etc) to see an accurate estimated delivery time for the product being ordered. Estimated Delivery: 2-3 Days
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10,280 Reviews

Trusted Service Award 2022

Product Overview

    Great coverage. Offers an overall width of 350mm and overall length of 520mm.
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    Award winning customer support. Speak to our team online or by phone
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Product Description

The Large Format Inline Slate Vent from Manthorpe is one of the best high-quality and effective choices for roofing ventilation and extraction through a roof covered with natural or man-made slates. Designed with a flat profile and lightly textured finish this slate vent will maintain an unbroken appearance to your roofline. The tortured path through the 4mm louvred grill and internal weathering geometry has been specially designed to maintain an airflow of approximately 6000mm² whilst channelling water ingress out of the vent, keeping your attic space safe from damp. 


Overview of Manthorpe Small Format Inline Slate Vent 

  • Ideal solution for ventilating slated roofs, expertly designed to ensure an unbroken roofline 
  • Equipped with protective edge laps improving durability and protection from the weather 
  • 4mm louvred flyscreen grill designed to maintain a free airflow of approximately 6000mm² 
  • Independently tested under tough conditions in a wind tunnel 
  • Suitable for 500x250mm down to 400x200m slates 
  • Built-in pipe adaptor for mechanical extraction 


Common Questions About This Slate Vent 

Which Slates is Slate Vent Compatible With?  

You’re able to use this slate vent alongside 500x250mm natural or man-made slates without alteration and can be used with smaller formats after trimming. Available in both black and grey this vent will also blend in with most slated roofs. 

How Do You Install This Slate Vent? 

This slate vent can be installed on roofs with a minimum pitch of 22.5 degrees (500x250mm slates) or 30 degrees (400x200mm slates) and a maximum batten gauge of 195mm (500x250mm slates) or 160mm (400x200mm slates). You will also require 6000mm² of free vent area.  Simply ensure that it is not being used to extract hot exhaust gasses or is placed close to other potentially hot elements of the roof structure. It cannot be situated over a rafter; the outlet must sit between two rafters. This vent can be installed without hassle by a single person. For guidance on the installation, refer to Manthorpe’s step-by-step guide by clicking here. 

Have More Questions About This Slate Vent? 

If you have any questions, don’t hesitate to get in touch with our award-winning team. They’ll help you pick the ideal product for your project, whether you’re revitalising an existing property or are tacking a larger new build. You can get in touch by calling 01295 565 565 or using our online live chat.  


Product Specification

View as Feet & Inch
More Information
Lead Time2-3 Days
Overall Length520 mm
Overall Width350 mm

Delivery Information

We understand that ordering products online can be daunting, especially when ordering roofing materials. It is for this reason that we make our delivery processes as simple as possible for you. However, there are a few things to know about our delivery processes. These include:

  • When placing an order, you’ll see a breakdown of your delivery charge in your shopping cart. These charges are for the UK mainland only, and additional charges may apply for Northern Ireland, the Scottish Highlands and other regions.

  • Deliveries only take place on working days (Mon - Fri) and do not take place on Bank Holidays. 

  • You’ll find an estimated delivery on the majority of product pages below the 'Add to Basket' button. Whilst we aim to deliver your items within the estimated delivery, it is only an estimate. 

  • You're able to select a preferred delivery date in your shopping basket. Whilst we aim to deliver your items on this date, it is not guaranteed.
  • Orders placed after 12pm, during the weekend, and on a bank holiday will not be processed until the next working day. Please consider this when placing your order as it may impact your delivery date.

  • After you’ve placed your order, you’ll receive an order confirmation by email outlining the details of your order. Please check your order confirmation email and inform us of any mistakes or errors immediately.

  • Shortly after receiving your order confirmation you’ll receive a separate email confirming the planned delivery date.

  • We can only provide a delivery date and are not able to confirm the time delivery will be attempted. Therefore, we ask that somebody is able to accept and sign for your items throughout the started delivery date.

  • If you are unable to accept and sign for an order, it can be left in a safe location in most circumstances. Please email [email protected] if you would like an item to be left without a signature. 

  • Whilst we aim to hold the majority of our products in stock, due to the vast number of products we offer this is not always possible. Because of this we are required to send your items directly from the manufacturer on a small number of occasions, at which point a different delivery charge may apply as standard.  

  • On occasions the items ordered may be shipped from different depots, which could result in seperate deliveries taking place.

If you have more questions about our products or delivery, please contact our team online or by telephone.

Refund Information

We understand mistakes can be made and we therefore keep our cancellation and returns policy as simple as possible. However, there are a few things to know about cancelling an order or returning an item. These include:

Items Not Required

Should you no longer require an item, you have the right to cancel within 14 days of delivery unless the items are custom made. You needn’t give us reason for cancelling your order but will be required to notify us by email. Once notified we will provide an address for the items to be returned to and arrange the necessary refund.

Faulty or Damaged Items

On the rare occasion that an item is delivered faulty or damaged, we will exchange it or provide a refund. We must be notified by email as soon as possible and may require images. To avoid such an issue, we ask that customers do not sign for damaged goods.

Custom Made Items

A handful of items are ‘Custom Made’. This means they are typically manufactured to the specifications provided by you and are therefore non-refundable. This is unless they are deemed to be faulty or damaged at the time of delivery, at which point you should notify us by email as soon as possible.

Further Information

For further information on cancellations, returns and refunds please read our full policy by clicking here. This confirms any other requirements to consider (i.e. packaging), fees that may be charged (i.e. admin charges) and our policy for businesses. 

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