Roof insulation in Roscommon
In Roscommon, 24% of houses built before 2011 meet the 0.16 W/m²K roof standard on their BER, against 24% nationally, and the middle roof area is 81 m². Attic floor insulation costs €1,800 to €2,101 for a semi-D before the €1,500 SEAI grant.
For homes in Roscommon, Boyle, Ballaghaderreen, Castlerea, Lanesborough-Ballyleague and Strokestown: how well Roscommon's roofs are insulated now, its climate, and what insulating costs.
Free and no obligation. Your plan goes to one contractor, not a list.
- 24%of Roscommon roofs meet the standard
- 0.26W/m²K, the middle roof U-value
- 81 m²middle roof area on BERs
- 2,088heating degree days a year
How Roscommon's roofs are insulated
Of 9,150 BER certificates for Roscommon houses built before 2011, 24% record a roof at 0.16 W/m²K or better, 33% are between 0.17 and 0.30, 32% are worse and 11% show no insulation. The middle roof U-value is 0.26 W/m²K.
Age matters: 40% of Roscommon houses built from 1978 to 1993 meet the standard, against 12% of those built before 1978 and 28% of those built from 1994 to 2010. In Census 2022, 38% of Roscommon's homes were built before 1981.
89% of these roofs are insulated at the ceiling, 6% at the rafters, 4% are rooms in the roof and 1% are flat.
Roscommon has about 2,088 heating degree days a year, measured at Roscommon from Met Éireann's 1991 to 2020 averages: more than Dublin's 1,825. The colder the place, the more a roof upgrade saves.
- 24%meet 0.16 W/m²K
- 11%show no insulation
- 9%insulated at the rafters or a room in the roof
- 38%of homes built before 1981
What roof insulation costs in Roscommon
| Job | Cost, VAT included | SEAI grant |
|---|---|---|
| Attic floor, detached house | €2,400 to €2,700 | €2,000 |
| Attic floor, semi-detached or end-of-terrace house | €1,800 to €2,101 | €1,500 |
| Attic floor, mid-terrace house | €1,600 to €2,200 | €1,400 |
| Room in the roof, 30 m² | €3,000 to €5,400 | One Stop Shop only |
| Warm flat roof, 25 m² | €3,300 to €4,800 | One Stop Shop only |
Attic floor figures are what SEAI-registered contractors were paid nationally in 2026, with an Irish installer's typical price; the others are per m² rates.
Plan your roof insulation
A few quick taps, and your plan fills in as you answer: the right method for your roof, what it costs, the grant and the standard to ask for. Contact details come last, and only if you want a contractor to price it.
Attic floor insulation, semi-d or end of terrace in Roscommon: €1,800 to €2,101 before the €1,500 SEAI grant, so about €300 to €601 to pay.
How the estimate is worked out
Attic floor insulation uses what SEAI-registered contractors were paid for each kind of home in 2026 and what an Irish installer charges, with the SEAI grant taken off. A room in the roof and a flat roof are priced per m² of the area you enter: rafter boards with a plasterboard finish, or a warm roof with a new membrane. VAT is included. Use it to plan with. It isn't a quote: a contractor prices your roof after a survey.
Towns we cover in Roscommon
We pass plans from every part of Co. Roscommon to an insulation contractor who works there, including:
- Roscommon
- Boyle
- Ballaghaderreen
- Castlerea
- Lanesborough-Ballyleague
- Strokestown
Where the insulation goes in a Roscommon roof
Each roof in our drawings, with its own page: the method, the cost, the grant and what to watch for.
Attic insulationThe usual job: wool over the joists, a cold attic above, an SEAI grant towards it.
Rafter insulationBoards between and under the rafters, so the whole attic stays warm.
Room in the roofSloping ceilings, knee walls and a small top ceiling, wrapped all round.
Insulating from aboveBoards over the rafters when the slates come off anyway.
Flat roof insulationA warm roof on the deck, or a cold roof with a vented gap.
Garage and extension roofsFlat or pitched, heated or not: what each needs.Roscommon questions
How much does attic insulation cost in Roscommon?
€1,800 to €2,101 for a semi-D and €2,400 to €2,700 for a detached house, before the SEAI grant.
How well insulated are roofs in Roscommon?
In Roscommon, 24% of houses built before 2011 meet the 0.16 W/m²K roof standard on their BER, against 24% nationally, and the middle roof area is 81 m².
Is there a roof insulation grant in Roscommon?
SEAI's individual grant for roof insulation is for the attic floor: €2,000 for a detached house, €1,500 for a semi-D or end of terrace, €1,400 for a mid-terrace and €1,100 for a top-floor apartment, with higher amounts for first-time buyers of an older home and some people on welfare payments. Rafter and room-in-roof insulation are grant-aided only as part of a One Stop Shop whole-home upgrade.
Which parts of Roscommon do you cover?
All of it, including Roscommon, Boyle, Ballaghaderreen, Castlerea, Lanesborough-Ballyleague and Strokestown. Your plan goes to one vetted insulation contractor who works in Roscommon.
Every guide and county page
Methods
Costs, grants and rules
Keep the heat under your roof
Pick the roof, what's there now and the home to see the method and the cost. When you want a firm price, your plan goes to a single vetted insulation contractor for your area.