The Dish Is a Bolt Through the Coat

The wall is cream. The WhatsApp photograph is eaves to damp-proof course, and someone in the group chat has written “wrap done”. Halfway up the side gable there is a grey dish on a steel arm, about the size of a dinner plate, bolted through the new coat into the old brick. That dish is not a feature. That dish is a bolt.

A winter coat with a coach-bolt through the chest is not a coat. Heat does not applaud the render. Heat leaves along the steel.

The bracket that sits in the wall

Let us invent a person. We will call her Orla. 1978 semi, Clontarf. Yellow brick, a cavity filled in 2014, later a cream wrap on three elevations. The sitting room is “grand now” except for a cold grey coin of plaster, the size of a saucer, at about the same height as the Sky dish on the side gable. She hangs a calendar over it in January. The calendar is not insulation.

That coin is the inside of four rawlbolts. The outside is a steel L-bracket and an arm that holds a dish because Sunday sport is not going to watch itself. A Sky Saturday after the wrap: drill, plug, tighten, “you’re grand”. The cream render now has four holes and a metal path back to 1978.

Heat does not queue at the arm

Insulation only works if it is continuous. A wall is a fence. A steel arm through the fence is a gate made of a radiator. Continuity dies at a bolt.

U-value is the score for the field: how easily heat walks through a square metre of wall. Psi-value is the score for the line, and for a small puncture that is not a window. A beautiful U-value with a rude bracket is a winter coat with a coach-bolt through the heart.

SEAI’s own homeowner guide to wall insulation is not a Sky manual. It is a list of questions you are supposed to ask before anyone starts. One of them, in so many words, is: will you reinstall my gutters, piping, satellite dish? SEAI’s Domestic Technical Standards then get specific. A dish takes wind load. It needs strengthened fixings that are actually rated for a wrapped wall and fixed the way the Agrément certificate says. The same document is blunt about the Saturday method: drill into boards or render without preparation and you get damage, water, cracked render, and a thermal bridge.

This is not a meter cabinet, an extractor fan, a lintel, a window reveal, an air brick, a party-wall radiator, a wet cavity, slumped fill, or the folklore that a cream elevation is just paint. Those are other holes. The live piece on the meter box that is a hole in the coat is a different Saturday: a plastic door at hip height that has to stay openable. You can close every cabinet and still own a steel straw at gable height. They are not the same job.

Planning is a different exam again. Citizens Information on house alterations is the plain-English version of the exemption: one dish, side or rear, not on the front wall, not bigger than a metre across, not higher than the roof. Permission for the front is not a thermal certificate. A legal dish can still be a rude bolt.

Two costumes, same bolt

There are two costumes in Dublin, and they fail the same exam.

Costume one: cavity fill. Two leaves, a gap, a hopper, a weather of beads. The gap is the job. The dish is not the gap. The dish is a steel arm sitting in the outer leaf, sometimes with bolts that have opinions about the inner leaf as well. Some crews leave a polite halo around the bracket because nobody wanted to pump beads onto a Sky invoice. Fill the field and the camera looks dark. Around the arm the camera looks like a star. The sitting-room plaster is the inside of that star. A proper fill treats the bracket as a neighbour: insulation can sit against a liner or a plate. “Do not fill the dish” is not a licence to leave a cave the size of a saucepan.

Costume two: the wrap. Boards on the outer face. Mesh. Render. A cream house. External wall insulation Dublin as a weather coat, not a paint job. The coat is correct for the field. The coat is a lie at the arm if the boards stop around a postage stamp of original brick, or if a Saturday crew drills through a finished elevation as if the coat were a poster. You cannot bury the dish in the wrap: the signal has to see the sky, and the bracket has to hold a sail. Take the dish down, bring the insulation through as a continuous sheet, remount on strengthened fixings that are meant for the new thickness, and seal the puncture. A rawlbolt through cream render into 1978 brick is a hole you paid to look finished.

The second-wall ticket in 2026 is how a 2014 hopper and a 2026 wrap end up on the same house. If you already used the cavity grant, you can still talk about a wrap. Close the puncture or you own two certificates and the same cold coin behind the calendar.

The cold coin on the sitting-room plaster is physics

Mould is not a lifestyle. Mould is a surface that got cold enough, long enough, in a room that makes water the way sitting rooms make water: people and the washing on the radiator. The field of an insulated wall stays above the trouble. Four steel bolts, or one fat bracket, drop. Indoor air hits the plaster that rings the fixings, drops its drink, and the calendar starts a hobby in a circle.

Orla wipes. The paint is not insulation. The wall is still “done”.

You can feel it without a camera. The plaster behind the dish is a different temperature to the plaster a metre along the sofa wall. After a wet west wind the render weeps a tea-coloured tear around the arm. That tear is the quote that stopped at the Sky invoice.

What the camera is looking for

You cannot diagnose a gable dish from the footpath if the wrap looks complete.

A surveyor looks at the arm. On a wrap: are the fixings the strengthened, Agrément-rated kind, or Saturday rawlbolts through cream? Do the boards meet a proper plate, or is there a postage stamp of original brick around a bracket that was never taken down? On a cavity: is the fill actually up to the bracket, or is there a polite cave? A thermal camera is a hole-detector: the field is dark, the dish wears a halo, and the sitting-room plaster wears a matching coin.

If the person quoting you will not look at the dish, they are quoting a field. A field is not a house. A house is a field plus the bolt that is not a window.

The money, without folklore

These are the current individual-grant figures. They are fixed by house type, not a percentage of a quote, and they are not a prize for wrapping a field and leaving a coach-bolt in the gable.

Cavity wall insulation, standard: apartment €700, mid-terrace €850, semi-detached or end-of-terrace €1,300, detached €1,800. That money is for a cavity that deserves a fill: clean, dry, empty — and actually filled up to the bracket, not filled except for a polite cave. Higher cavity figures exist if you are on a qualifying welfare payment: apartment €900, mid-terrace €1,100, semi-detached or end-of-terrace €1,700, detached €2,300.

The wrap is €3,000 for an apartment, €3,500 for a mid-terrace, €6,000 for a semi-detached or end-of-terrace, and €8,000 for a detached house. Internal lining is €1,500 / €2,000 / €3,500 / €4,500 across those same four types. The plain-English table, edited 28 May 2026, lives on the Citizens Information page for Better Energy Homes.

Attic insulation is still the hat, and the hat still comes first. Standard: apartment €1,100, mid-terrace €1,400, semi-detached or end-of-terrace €1,500, detached €2,000. Enhanced, if you qualify: €1,400 / €1,800 / €1,900 / €2,500. What you pay after the grant, on a normal Dublin attic done properly, is typically €300 to €1,500. Do the hat. Then argue about the walls, including the bolt through the coat.

The house has to have been built and occupied before 2011. Approval comes before work. If work starts before SEAI says yes, the grant is gone. If SEAI does not approve, no work starts, and you pay nothing. That is the grant guarantee as Retrofit Dublin runs it. Retrofit Dublin is SEAI-registered. The phone is 01-233-7477. The 15-year guarantee is on the insulation, not on the folklore that a cream elevation is a finished dish.

Technical Guidance Document L is the energy rulebook: U-values for the field, and Appendix D for the lines, because a wall is not only a wall. A default y-value of 0.15 is the polite way of saying “we did not draw the junctions.” 0.08 is the number you get when the junctions look like the drawings. Dish brackets are junctions. The Irish Times set out the 2026 second-wall change when the package landed. RTÉ put the insulation-grant increases in the same January announcement. Neither of them is going to write you a hymn about a grey plate on a gable. That is our job.

Close the puncture, then argue about the coat

A whole-home energy strategy is an order of operations. You stop the leaks. Then you change how you make the heat. The cheapest first move in most Dublin houses is still the hat. Then the walls, including the bolt. Cavity if the camera says the gap is clean, dry, empty, and the beads actually reach the bracket. A wrap if the cavity is the wrong job, with the dish taken down and put back on fixings that belong to the new thickness. Then the machines.

Retrofit Dublin does home energy upgrades in that order on purpose: fabric, then systems. A heat pump behind a cream wall and a glowing coin behind the calendar is a very efficient device heating a coach-bolt. Do not buy an expensive machine to feed a puncture you refused to close.

If the dish is still a bolt through the coat and the sitting-room plaster is still a cold coin, Claim Your Grants.