A Roof Window Is Occupied Tile

People count a Dublin roof the way they count a car park. Every rectangle looks available. Then they notice the Velux. They treat it as a personality — “we like the light on the landing” — and as a footnote. A footnote is a sentence at the bottom. A roof window is a hole in the factory floor. You cannot park a panel on a hole.

Solar Panels Dublin are sold as a photograph of a full slope. The photograph is taken from the garden, at noon, after someone has cropped the landing window out of the story. The window is still there. It is already a pane. Daylight for a room, factory on the tiles: two jobs, one plane. The window wins the tiles it sits on. It also throws a moving stripe onto the tiles it does not sit on. Leave a gap. Do not straddle.

A hole is not a spare tile

A roof window is occupied territory. The glass in the slope is doing daylight. The glass you want to add is doing electricity. They are not interchangeable. You do not tile a module over a Velux any more than you tile a module over a chimney pot and call it ambition. The pot is a tower. The window is a rectangle that has already been claimed. The claim is older than the quote.

Count it that way and the roof gets honest. A typical attic conversion on a south slope did not leave you a blank field. It left you a field with one or two bright doors in it. Those doors are not “a bit of character.” They are missing factory. If the quote still talks as if every square metre of that slope is a candidate, the quote is counting a car park that has two spaces already painted for someone else.

This is not a complaint about light. Keep the landing window. Just stop pretending the rectangle is also available to a second pane. One job per hole.

The kerb takes a second ring

Then the window is not only the pane. It is a collar. An upstand. A flashing kit that steps the tiles up and around so rain does not walk into the bedroom. From the garden the collar disappears. From the plane of the tiles it is a small wall around a hole. The factory cannot sit on the wall. The factory cannot sit in the hole. The factory cannot sit on the first ring of tiles that the flashing owns.

So one Velux is not “one missing panel.” It is a missing panel plus a halo of tile that is already employed as weather. Installers who “fill the roof” treat that halo as wasted space. It is not wasted. It is how the window stays dry. Steal the halo for glass and you have not gained a clever kilowatt. You have asked two weathers to share a seam.

Dublin is full of these collars: the 1930s semi with a landing Velux, the 1990s conversion with two boxes on the sunny slope. None of them is a villain. All of them have already spent tiles. Solar Panels Dublin that ignore the spend are not ambitious. They are optimistic about holes.

Then the pane throws shade

Occupied tile is the first theft. The second theft walks. Even shut, the frame sits proud of the slates. Late afternoon the stripe walks. In winter the sun is lower, so the walk is longer. The window will still be there in 2041.

We already wrote that a bit of shade is not a cosmetic. That was the stripe as an electrical event. Today’s job is the object that draws one of those stripes, and the tiles it has already taken. You need a gap. Leave the walking stripe as tile. Unused tile next to a Velux is not a failed sale.

Ireland already wrote the unromantic version down. The SEAI Solar PV Code of Practice tells the installer to design for local shading from trees, vegetation, and adjacent structures, and to put the array where shading is minimal. A roof window is an adjacent structure that happens to be made of glass. It is on the same roof. It does not get a free pass because it is pretty from the pillow.

Do not straddle

The temptation is a photograph. A module butted tight to the flashing. A corner of glass hung over the pane so the slope still “looks full.” Two panels meeting above the sash like a badly planned bridge. That is a straddle. A straddle is three bad ideas wearing one smile.

First, the smile shades itself. The upstand and the overlapping frame sit on the bottom cells of the module for a slice of every clear day. You have not gained the tile. You have hired a permanent visitor. Second, the smile is a weather argument. The window’s flashing was designed to see sky and tile, not the underside of a factory. Rain, leaf, and the next storm have to negotiate a seam nobody drew. Third, the smile is a maintenance sulk. You cannot wash the Velux. You cannot open it properly. You cannot get a ladder to the sash without standing on glass that was not a walkway. The window company and the array company will both point at the seam when something weeps in 2033.

Leave a gap. A real one. Tile between the collar and the first module. Enough that the winter stripe dies on slate. Enough that a human can reach the sash. Enough that the two weathers do not share a coat. If that means fewer panes on the sunny slope, it means fewer panes. A smaller clear factory beats a larger one that works a short day for a landing window and then argues about a leak.

Two windows, one slope

Two Veluxes on a south plane are not a detail. They are a map. The honest drawing is two holes, two collars, two walking stripes, and the leftover rectangles that actually see the sky. The dishonest drawing is twelve modules in a WhatsApp grid with the windows treated as a later problem. Suitable includes the glass that is already in the tiles. It is a count, not a personality test.

The grant does not see the hole

This is the part that arrives as a rumour with a euro sign, and it is worth reading slowly because the rumour always smuggles in a yield guarantee the Velux never signed.

There is an individual solar electricity grant. The current figures live on the SEAI Solar PV Scheme Guide. It is for solar PV. The figures are €700 per kWp up to 2 kWp (€1,400 for 2 kWp), then €200 for every additional kWp up to 4 kWp (€1,600 for 3 kWp), with the maximum solar PV grant capped at €1,800 (€1,800 for 4 kWp). The guide’s own pro-rata example is a 2.5 kWp system at €1,500. There is no battery grant. The maximum remains €1,800 in 2026: RTÉ reported Minister O’Brien holding the cap, and The Irish Times recorded the same reversal.

Read that again with a landing window in mind. The grant looks at kilowatt-peak: the nameplate of the factory you named. It does not subtract because two Veluxes already own a stripe of the south slope. It does not add a bonus for a clear plane. A straddled window and an honest gap can attract the same envelope. The envelope is not a window inspection. It is a contribution to the kit. The sky still has to work. The tiles still have to be free.

You apply. You wait. You get a grant offer. Then the work starts. Start before the offer exists and the application can die on the spot. If SEAI does not approve, no work starts, and you pay nothing.

Offer first. Then the street.

Your installer still has to tell the wires that a factory is arriving. Ireland already described that conversation as policy on the government micro-generation page. The practical form lives on the ESB Networks micro-generation page. The street does not care about your sash. Fine. Extra is harder to make if a module spends the afternoon sitting on a Velux stripe because someone wanted the photograph to look full. Grant offer, then the notification, then glass on the leftover rectangles, then the post-works BER, then the claim.

A survey includes the glass in the tiles

A survey that never opens the landing and never stands on the slope is a noon brochure with a grant form attached. Someone should count the windows as occupied tile. They should draw the collar. They should watch where the stripe walks in a low sun. They should refuse the straddle even when the leftover rectangles look lonely. Lonely tile is how a window stays a window.

Insulation first is still the cheaper sentence, and the State’s Technical Guidance Document L for dwellings is the unromantic order: keep the heat you already paid for. Insulation first is cheaper than generating more heat. Close the hat, then argue about the factory. Today’s argument is simpler again. Do not cover a window. Do not straddle it. Leave a gap.

Retrofit Dublin does home energy upgrades as an SEAI-registered contractor: attics, walls, the later conversations, and Solar Panels Dublin when the roof is the next true step and the array has rectangles that are actually free. The 15-year guarantee is on the insulation work. Do not borrow it for the panels. The phone is 01-233-7477 if you would rather point at a Velux with a human than with another tab.

The folklore will keep selling a full photograph as the whole product. Dublin sells landing windows, attic conversions, and two bright doors in the sunny slope. Put the factory on the leftover sky. Leave the collar to the rain. Leave the stripe to the slate. Do not let a pane you already like become a second, worse pane.

If the roof is ready for a factory and you want the array — and the gaps — that can live next to the windows you already have, call 01-233-7477 and Claim Your Grants.