Loft Legs vs timber counter-battens (engineering comparison).
Both systems raise your 18mm tongue-and-groove attic floor above 300mm mineral wool, but they suit different roofs.
Here is how professional Irish attic installers decide between Loft Legs, XL Loft Legs and structural timber counter-battening.
Free, no obligation. One local attic flooring specialist prices your job, not five.
- 180g vs 14 kg/m²Dead weight added to ceiling joists
- Zero vs 12%Thermal cold-bridging through wool
- €55–€85/m²Loft Leg system installed
- €70–€105/m²Timber counter-battened deck
2026 Irish Price & Specification Table
Side-by-side comparison: Loft Legs vs Counter-Battens
Why modern post-1975 truss roofs usually favour Loft Legs while older cut-rafter roofs sometimes need timber counter-battening.
| 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
Technical pros & cons of each raised subfloor system
Dead weight on ceiling joists
Stacking 175mm–200mm of solid C16 structural timber across a 20 m² attic adds roughly 250–300 kg of permanent dead weight before a single box is stored. Polypropylene Loft Legs for the same 20 m² weigh less than 15 kg in total.
Thermal bridging (Part L / BER impact)
Timber has a thermal conductivity of ~0.13 W/mK — three times higher than mineral wool (0.044 W/mK). Running continuous timber joists across the top of your insulation creates linear thermal bridges, whereas slender point-contact Loft Legs have negligible thermal bridging.
Levelling bowed or uneven pre-1975 joists
In Victorian, Edwardian and 1930s–1960s cut-roof homes, ceiling joists have often sagged by 15mm–30mm over decades. Timber counter-battens set to a laser line can be packed and scribed to create a dead-flat floor.
Hybrid Leg + Batten System
For ultimate rigidity over 300mm+ wool in trussed roofs, installers often fix Loft Legs to the truss bottom chords, screw 44×44mm or 75×44mm kiln-dried battens across the leg tops, and lay 18mm T&G boards perpendicular to the battens.
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.
Loft Legs vs Timber Counter-Battens questions answered
Are plastic Loft Legs really strong enough to walk on?
Yes — BBA/manufacturer load testing shows each recycled polypropylene Loft Leg withstands over 450 kg in vertical compression. When tied together at 400mm–600mm centres under glued 18mm P5 tongue-and-groove chipboard, the deck feels rock-solid underfoot.
Why shouldn't you screw 8x2 timber joists on top of 35mm trusses?
Stacking deep, heavy 200mm×44mm joists crossways onto slender 35mm truss chords eats into your safe storage load allowance and risks splitting the narrow 35mm chord if heavy coach screws are driven in without pilot holes.
Which system is faster to install?
Loft Legs pass effortlessly through even the smallest hatch in boxes and install in a single day with zero sawdust downstairs. Carrying 4.8-metre lengths of 6x2 or 8x2 structural timber up a finished staircase is slower and risks marking hallway walls.
Can you mix both systems in the same attic?
Yes — many installers use Loft Legs across the main storage deck and build a reinforced timber counter-batten frame beneath heavy cold water tanks or MVHR heat-recovery units.
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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.