Sanctus Builders handles the insulation work most Christchurch homeowners ask for in older housing stock, along with the flooring, tiling and interior upgrades that usually go with it. Felipe assesses the home, explains what's actually causing a cold room or a tired-looking interior, and gives a straight price for fixing it.
This service covers two connected but different kinds of work.

Insulation installation, acoustic insulation, draught-proofing, and thermal upgrades, the work that changes how a home actually feels to live in.

Flooring, tiling, painting and decorating, feature walls, cabinetry installation, splashbacks, shelving and storage, and accessibility and home safety improvements.
Cold floors, even with the heating on.
Condensation building up on the inside of windows overnight.
A noticeably colder room at one end of the house than the other.
Heating bills that feel high for the size of the home.
Any one of these usually points to missing or failed insulation, most common in Christchurch homes built before insulation was standard. Sanctus Builders checks the roof cavity and underfloor space directly rather than guessing from the symptoms alone.
Once a floor or wall is opened up for insulation or draught-proofing, it's often the practical time to deal with tired flooring, dated tiling, or a room that needs repainting anyway. Sanctus Builders can scope insulation and the interior finish work together in one quote, rather than treating them as two separate jobs that both disturb the same space.
Here's what happens on an insulation or interior upgrade job with Sanctus Builders.
Felipe checks the roof cavity, underfloor space, or the room itself.
Insulation type and R-value, or flooring, tile and paint options, chosen for the room and budget.
Insulation, flooring, tiling and cabinetry fitted to a proper finish standard.
A walkthrough to confirm the work is done properly.
Sanctus Builders doesn't publish fixed insulation or flooring prices, because the real variables change the number too much for a price list to mean anything. These are the things that actually affect cost:
| Factor | What It Affects |
|---|---|
| Size of the area | Being insulated, floored or finished. |
| Current condition | Whether there's existing insulation to remove or a floor that needs levelling first. |
| Material choice | Insulation R-value, flooring type, or tile and paint grade. |
| Access | Roof cavities and underfloor spaces vary a lot in how easy they are to work in. |
| Combined work | Whether insulation and interior finish work are being done together in one job. |
Every insulation or interior upgrade job gets a free, honest quote after Felipe has actually assessed the space, not a number pulled off a price list.
Sanctus Builders holds a five out of five rating across Google and Builders Crack. Here is what some of those customers had to say.
"Friendly, great communication and great tidy work"
"Great price. Fantastic professional service! Felipe was super efficient and I was impressed with his knowledge and quality of workmanship. I will definitely keep him on my list for future jobs! Thank you Felipe, and your wonderful assistant!"
"Reasonable price. Amazingly quick response to request for a builder. A great skilled worker with ability to bring in helpers as required. Nothing appeared to be too difficult, from laying paving to assembling a large kitset workshop shed, in a fast and efficient manner. Would definitely contact for future work."
"Felipe is an amazing guy, super friendly, helpful, flexible and hardworking. We've loved having him in our house doing renovations. The work looks good and he did exactly what we wanted. Would definitely recommend. We'll be getting him back to do more."
"Tough job completed to a high standard and on time. Would definitely use again."
It depends on the size of the roof cavity or underfloor space and the insulation type chosen. Sanctus Builders quotes after assessing the space, not off a generic per-square-metre rate.
Yes, and it's often the most efficient way to do it, since opening up a floor for insulation is also the practical time to deal with tired flooring or tiling in the same room.
Yes. Sanctus Builders installs insulation and handles interior upgrades right across Christchurch, not just the inner suburbs.
Both. Sanctus Builders insulates a single cold room as readily as a full roof cavity or underfloor space, whatever the home actually needs.
Yes. Felipe checks the roof cavity and underfloor space directly and gives a straight answer on what's actually missing or failed, rather than guessing from a phone call.
Sanctus Builders is based on Opawa Road in Waltham and installs insulation and carries out flooring and interior upgrades right across Christchurch, with a focus on the older homes that need it most. Wherever the job is, the same honest price and the same standard of work applies.
Tell us about the insulation, flooring or interior upgrade you're after and we'll come back with a straight price for making the room work properly. Call, message, or fill out the form below.
Tell us what needs doing and we'll get back to you with a straight answer.