Attic flooring & SEAI insulation grants in Ireland (2026 guide).
SEAI offers €800 to €1,500 toward upgrading roof insulation to 300mm mineral wool (U-value 0.16 W/m²K).
Should you floor your attic before or after the SEAI insulation crew visits? Here is the exact sequence that saves you money and avoids rework.
Free, no obligation. One local attic flooring specialist prices your job, not five.
- €800–€1,500SEAI Attic Insulation Grant (2026)
- 300mm DepthMandatory SEAI mineral wool thickness
- 0.16 W/m²KTarget ceiling U-value for BER
- Walkway RequiredMandatory boarded path to water tank
2026 Irish Price & Specification Table
Should you board your attic before or after SEAI insulation?
Getting the sequence right between your SEAI insulation contractor and your attic flooring specialist saves hundreds of euro.
| Job / Package | Typical 2026 Price | What Is Included |
|---|---|---|
| Raised loft boarding + Stira stairs package (15–25 m²) | €950 to €2,400 | Our most popular 1-day package: 270mm XL Loft Legs over 300mm mineral wool, 18mm P5 T&G chipboard deck, and insulated folding timber attic stairs. |
| Raised attic flooring on Loft Legs / XL Legs (supply & fit) | €55 to €85 a m² | Elevates the floor 175mm–300mm above ceiling joists so 300mm quilt insulation stays uncompressed and SEAI BER ratings are protected. |
| Structural timber counter-batten raised deck (175×44mm) | €70 to €105 a m² | Cross-battened C16 treated timber joists fixed perpendicular to ceiling ties for heavier storage loads and older cut-roof attics. |
| Standard T&G boarding directly onto deep joists | €42 to €62 a m² | Only suitable where ceiling joists are already 250–300mm deep or where rafter insulation is used instead of joist wool. |
| Stira-style insulated folding timber attic stairs (supplied & fitted) | €350 to €650 | EN 14975 3-section folding pine/beech ladder (150kg–160kg rating), insulated airtight trapdoor (U-value 0.55–0.85 W/m²K) and architrave. |
| Attic hatch enlargement, relocation or new opening | €180 to €340 | Trimming ceiling joists, fitting double timber trimmers, plasterboard making-good and draught-proof perimeter seals. |
| Heavy-duty concertina aluminium loft ladder (narrow landing) | €520 to €850 | Die-cast aluminium scissor ladder for tight box-room landings or high floor-to-ceiling heights up to 3.3m. |
| LED loft batten tube light + pull-cord/landing switch | €95 to €180 | 4ft or 5ft 18W–36W daylight LED vapour-proof batten wired to your upstairs lighting circuit. |
| Safety grab rail / timber hatch balustrade & eaves shelving | €140 to €320 | Perimeter handrail around the open hatch plus raised side-truss shelving bays. |
Technical Breakdown
How raised attic boarding complies with SEAI & BER rules
Best sequence: Insulate first, then fit raised boarding
If you are claiming the SEAI attic insulation grant (€800 apartment / €1,200 mid-terrace / €1,300 semi-D / €1,500 detached), let the SEAI contractor roll out the full 300mm mineral wool and insulate your water tank and pipes first. Once signed off, our specialist fits 300mm XL Loft Legs and an 18mm T&G deck cleanly above the new wool.
What if you already have old boards screwed directly to the joists?
SEAI grant rules state that existing low-level chipboard cannot simply be left over thin 100mm insulation unless insulated to 0.16 W/m²K. An attic flooring specialist can lift the old boards, let the SEAI crew install 300mm wool, and re-lay the deck on raised Loft Legs.
Mandatory SEAI water tank platform & walkway
Under SEAI Code of Practice and S.R. 54, every upgraded attic must have a raised, un-compressed boarded platform under the cold water storage cistern and a safe boarded walkway from the hatch to the tank — plus an insulated draught-proof hatch.
How BER assessors treat floored attics
When a BER assessor inspects your attic after works, they measure the uncompressed depth of mineral wool beneath the raised deck. Because Loft Legs keep the full 300mm lofted and visible at the perimeter, the assessor logs the full 0.16 W/m²K ceiling U-value.
Calculate your attic flooring & stairs cost
Two taps: pick your approximate loft area and whether you need raised boarding over insulation, a Stira stairs package, or both.
Your attic area × our 2026 Irish price guide
€1,480 to €2,320
20 m² at €55–€85/m² plus €380–€620 for the insulated folding attic stairs & draught-proof hatch.
- Raised Loft Legs keep 300mm mineral wool uncompressed so your BER rating and SEAI grant compliance are protected.
- All panels are 18mm P5 moisture-resistant tongue-and-groove loft chipboard fitted in 1 day.
How this estimate is worked out
Our calculator multiplies your floor area by 2026 Irish supply-and-fit rates: €55–€85/m² for raised loft boarding on 175mm–300mm Loft Legs over mineral wool, €70–€105/m² for structural counter-battened decks, plus €380–€650 where an EN 14975 insulated folding attic stairs is included.
Get a free quote for your attic floor & stairs
Four quick taps and your number. Your request goes to one local attic flooring & loft boarding specialist covering your county, who rings you back with a fixed written price.
Attic Flooring & SEAI Insulation Grants questions answered
Does the SEAI grant cover the cost of a Stira stairs or full attic floor?
The SEAI grant covers insulating and draught-proofing the attic hatch/lid, insulating pipes and tanks, Eave ventilation trays, and a basic maintenance walkway to the water tank. If you want a folding Stira stairs or a larger 15–30 m² storage deck, you pay the difference privately.
Will boarding directly onto my joists fail a BER inspection?
If a BER assessor sees chipboard screwed straight onto 100mm ceiling joists with no top-up layer above or below, that area must be entered at a poor U-value (~0.40 W/m²K), which can drag your home down by a full BER grade (e.g. from B2 to B3, costing you green mortgage discounts).
Can you raise an existing attic floor that was laid directly on joists?
Yes. If the existing 18mm T&G boards are in good condition, our installer can unscrew and lift them, fit 175mm–300mm Loft Legs and 200mm top-up mineral wool, and screw the panels back down.
What U-value does an attic hatch need for SEAI compliance?
SEAI specifies that the attic hatch must be fitted with rigid insulation equivalent to the ceiling or be a factory-insulated folding stairs unit with continuous perimeter draught stripping and a latch.
Related attic flooring guides
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Attic flooring & Stira stairs across all 26 counties
Requests from all 26 counties go to one local attic flooring and loft ladder installer covering your county — from Dublin, Cork, Galway and Limerick to Kildare, Meath, Wicklow, Louth, Waterford and Donegal. Pick your county below for local prices, housing stock data and specifications. Compare all 26 counties covered →
Get a free quote for your attic floor & stairs
Four quick taps and your number. One local attic flooring & loft boarding specialist covering your county rings you with a fixed written price. Nothing is booked until you accept it.