Loft Insulation in Llantrisant
Cardiff Insulation Company provides loft insulation in Llantrisant and the wider CF72 area, including Talbot Green, Pontyclun and Llanharry. It's a quick trip along the M4 from Cardiff, so arranging a free survey is simple.
The area has two very different sides: the old hilltop town with its historic houses and narrow streets, and the large modern estates that have grown up below it. We tailor the work to the house in front of us, whether that's topping up an older loft or making a new-build roof space usable for storage.
Prefer WhatsApp? Send us a photo of your loft on 07785 458358At a glance: Llantrisant
- Postcodes
- CF72
- Area
- Rhondda Cynon Taf
- Survey
- Free, no obligation
- Quote
- Usually within 24 hours
- Typical loft job
- One day
- Open
- 7 days, 8am–6pm
Old town and new estates
Llantrisant's old town sits on a hilltop, with older stone cottages and terraces along steep, narrow streets. Their lofts can be small and irregular, with old timbers and limited access, and some have had little or no insulation added in decades.
Down the hill, Talbot Green, Pontyclun, Llanharry and the surrounding area have seen a lot of house building in recent decades, with large estates of detached and semi-detached family homes. These have trussed-rafter roofs and were insulated when built, but the trusses criss-cross the loft and leave little floor to walk on. Owners here usually come to us wanting storage space rather than warmth, and the challenge is adding that without squashing the insulation the builder installed.
What Llantrisant homes usually need

Loft Boarding in Llantrisant
New-build estates around Talbot Green and Llanharry have lofts full of trussed rafters, and raised boarding gives usable storage between them without crushing the existing insulation.

Loft Ladders in Llantrisant
Once a modern loft is boarded, an aluminium sliding or folding ladder makes getting boxes up and down safe and easy.

Loft Insulation in Llantrisant
Cottages and terraces in the old hilltop town often have thin or missing insulation, and bringing them up to a proper depth makes a noticeable difference.
Practical notes for the Llantrisant area
In the old town, streets are steep and parking is limited, so we'll arrange access in advance. On newer estates the main thing to know is that trussed rafters must never be cut or altered to make room for boards; we raise the floor on loft legs and work around them.
If you're planning storage in a modern loft, our loft boarding service page explains the approach, and our guide to choosing a loft ladder helps you pick the right type for your hatch.
Hilltop houses in the old town are more exposed to wind and rain than the sheltered estates below, so on those surveys we spend extra time checking slates, felt and timbers before recommending anything. You can ask for a free CF72 survey online.
Loft insulation in Llantrisant: FAQs
Can you board a new-build loft in Talbot Green without damaging the trusses?
Yes. Trussed rafters are engineered and shouldn't be cut, notched or have their webs removed. We fix loft legs to the ceiling joists and lay boards on top, keeping clear of the diagonal truss members. That gives you a solid storage area at a height that leaves the insulation below at full depth. We'll show you the area we can board at the survey.
My new-build already has insulation. Why not just lay boards on top?
Boards laid directly on the joists squash the insulation underneath, and compressed mineral wool insulates far less well because the trapped air is what does the work. Many new-build lofts already have insulation deeper than the joists, so flat boarding would crush it. Raising the boards on loft legs avoids that, and boarding starts from £500.
Do you insulate older houses in Llantrisant's old town?
We do. Older cottages and terraces on the hilltop often have awkward, low lofts with small hatches. We assess the space, check the timbers and ventilation, then lay mineral wool where it fits and use SuperFOIL on the rafters where the space is too tight. Most jobs are completed in a single day.
Can you fit a loft ladder if my hatch is too small?
Yes. Many modern hatches are on the small side for a ladder. We can enlarge the opening, trimming it correctly between joists, then fit a new insulated hatch and an aluminium folding or sliding ladder. Ladders are priced after survey, because the hatch size and ceiling height affect which models fit.
Free loft quote in Llantrisant
Tell us a little about your loft and we will come back to you, usually within 24 hours. Prefer to talk? Give us a call, or WhatsApp us a photo of your loft.
- No obligation
- Clear written quote
- Local Cardiff team
- 5-star rated on Google