Flat roof windows

Flat roof windows will help you enjoy the optimum amount of natural light in your home. They can be used everywhere where it is not possible to install façade windows. What is important, if the shape and form of the building allow it, you can also install the flat roof window in one room together with the windows for sloping roofs. This way you can let even more light into your attic!

Windows for flat roofs – why should you consider installing them?

Thanks to the almost perpendicular angle of the flat roof window to the sun, light is dispersed in all directions. So it can reach even the darkest corners of the room. A properly selected number of roof windows also reduces humidity in the room. It is worth remembering that most flat roof kits are maintenance-free. So you do not have to decide yourself when to open the windows to ventilate the room or to get rid of dampness.

What are VELUX flat roof windows made of?

VELUX flat roof windows consist of two basic components, regardless of their type. These are:

window – with safe and energy-efficient glued glass and a frame and window sash made of PVC profile;
external element – dome, flat glass module or unique spherical glass module.

When choosing a window for a flat roof, it is this external element that should be paid special attention to. It has a decisive influence both on the final visual effect of the entire window set, and its functionality.

Types of flat roof windows – what to choose?

All opening windows for flat roofs provide light, ventilate the room and also take care of regulating humidity levels.

The VELUX spherical glass module can be installed on roofs with pitches as low as 0°. It has a curved glass outer pane using CurveTech technology. The curved glass outer pane uses CurveTech technology to keep snow, leaves and other debris out of the window, as all organic matter slides away from the curved pane and does not obstruct the view. This way, the right amount of sunlight can always come through the window. The spherical module is also very visually attractive. It is therefore ideal for green roofs and terraces.

The VELUX Flat Glass Module can be mounted on a roof with a minimum pitch of 2°. It too is made of scratch-resistant glass, but its surface is perfectly flat. It is also made of scratch-resistant glass, but its surface is perfectly flat, so it blends in perfectly with the roof and hides discreetly in its structure. The flat module is therefore worth choosing when you want no additional element to disturb the even line of the roof.

The VELUX dome for flat roof windows has a convex shape so that all debris is quickly removed with the rain. However, it is covered with a different external material than the glass module – it can be made of acrylic or polycarbonate. These are durable plastics that are resistant to all scratches caused by hail, freezing rain or falling branches.

Spherical and flat glass modules, as well as domes, can be controlled electrically. Electric windows are fitted as standard with a rain sensor which, when it detects the first drops, will automatically close the windows. If you additionally connect them to the VELUX ACTIVE system and app, the windows will control the climate in your home and provide the best living comfort.

How to install flat roof windows in the building?

When you decide to buy windows for a flat roof, be sure to find the right installer to handle the installation quickly and correctly. At Fenbro we have a fitting team that specialises in flat roof windows installation. Fenbro provides installation of windows in Ireland.

How it works

Asking for a quote

Press ‘Get a quote’ button and submit your enquiry with the chosen joinery parameters.

Receiving the quote

Our sales team will return to you with the purchase quote on joinery, delivery/installation costs and the lead time.


Our employee will go through all the information included in the offer together with you.

Agreement & Payment

It is the stage where we confirm the contract and you make the payment.


It’s the time it takes to produce your ordered joinery.


This is the shipment period for your ordered products.


If you’re interested in our installation services, we agree on the dates individually.

Wondering what you can achieve with us?

Frequently asked questions

How do I get a quote?

First of all,  you should send us your enquiry where you specify your chosen joinery parameters, dimensions and qualities.

In order to prepare a quote for you, we need the following details:

  • Model window/door (aluminium/uPVC) – [any specific U-value is required?]
  • Width x Height [mm]
  • Colour from internal/external side
  • Glazing: double/triple
  • Eircode (so we can check delivery cost)
  • Contact details, email address, phone number

In case you want the quote for installation services as well, let us know and specify whether you are interested in a new project or windows replacement.

Next, we will provide the personalised quote for the purchase of joinery together with installation costs, delivery and lead-time.

Please send all the information and enquiries about our offer to the following e-mail address: info@fenbro.com

Do you deliver & install joinery?

We deliver joinery to Ireland every week. At the moment, we offer installation services only in Ireland.

Our offer includes:

  • Product
  • Delivery
  • Installation (Ireland) + after-sales service
  • You receive a 5-year guarantee on Windows/doors (10 years for VELUX) and 2 years for the fitting.

We do not have any showroom in your country. All our joinery is sent to customers directly from Poland.
Our Company is based in Warsaw (Poland) and we also have a local sales point and warehouse in Ostrołęka, Poland.
All joinery is produced by Polish producers.

What are the delivery costs?

The cost of each delivery is calculated individually. The cost of delivery depends on the weight and size of pallets and their number.

Please send all enquiries about our offer to the following e-mail address: info@fenbro.com


Do you have a price list?

We are selling complex products, tailored services and our customers often require a special solution. That’s why each of our products is personalised and we do not have the standard price list. Every product is quoted according to individual customer needs.

Please send all enquiries about our offer to the following e-mail address: info@fenbro.com

How does the payment for your service look like?

There are two payment options for our customers.

A) You can pay in two instalments:

  • 50% when you accept the order
  • another 50% before the dispatch of the goods.

B) You can pay full (100% of the amount) in advance.*

*then we give you 2% discount

We only accept payments via bank transfer.

What is the warrantee/guarantee on your products?

All windows  and doors purchased at FENBRO have a following full guarantee:

  • 5 years for all our products

  • 10 years for all VELUX products

  • 2 years for the installation (with service provided by us)

In case of each sale, you get a sales contract together with an invoice. We always archive all invoices for 5 years as evidence of purchase.

Guarantee and complaints:

In case of any complaint, we will ask for photos and a description of what happened (preferably by an email). We are sending new products as fast as we can and in the meantime, we are taking care of the complaint. The typical length of time for complaint resolution is from 3 up to 4 weeks . You will get the spare parts within 7 -14 days. 

Please remember that the transport also is fully insured so everything is secured at all stages. For the delivery, you get a CMR document. It is a confirmation of delivery a proof that the products were received in good condition. You have 48 hours to check the conditions of your order. 

Depending on the type of the issue, we are sending spare parts, new products for replacement, or we refund the money.


Guarantee and DIY installation:

The guarantee is valid even if the window installation is carried out by our clients themselves or by an external company. The most important thing is that the installation is carried out in an artful manner and according to the installation instructions for the window.

Additionally, we offer support after the guarantee period is over. It means that if something happens with your joinery afterwards, we can get you all the necessary spare parts, ready-made products and tools to help you solve the issue (the service is chargeable at the end of the guarantee period). 

Please note that if you choose your own fitter, you are responsible for providing them with correct measurements of the openings as well as products dimensions. We cannot be held responsible for any irregularities in this regard.