Radon vent pipes, plumbing and extraction penetrations, and flue holes, cored clean through block, render, stone and concrete. Round, square to the face, and sealed back up tight.
Vent hole installation is all the small-bore penetrations a building cannot do without. The radon vent pipe through the foundation, the 110mm soil and waste runs, the cooker hood and bathroom fan outlets, the MVHR ducting, and the flue exit for the boiler or the stove. Each one cored to size with a diamond bit so it comes out round and the trade after us can sleeve straight into it.
Get one of these wrong and you let water in, crack the render, or clip a buried service. We set the centre out first, check for rebar and pipework where we can, and anchor the rig so the bore stays true. The hole is cut wet or dry to suit the room, the core and slurry leave with us, and the wall gets made good around the penetration before we go.
A clean bore through the foundation or sub-floor for the radon vent pipe to run, plus the penetration the sump and pipework need. Cored, not bashed out, so the membrane and seal go back tight around it.
Soil and waste at 110mm, supply lines, condensate and gas, cored through block, render, stone or concrete. A round hole the plumber sleeves straight into, with no breaking out and making good after us.
Cooker hoods, bathroom and utility fans, tumble dryer vents, MVHR ducting and air-to-water pipe runs. The hole comes out neat on both faces, so the grille or sleeve sits flush against the wall.
Flue exits for oil and gas boilers and solid-fuel stoves, cut to the diameter the appliance asks for through block, stone or concrete. Set out off the manufacturer spec before the rig goes on the wall.
A few vent and core jobs from the van, photographed on site as we left them.
The questions the crew gets asked most on this kind of job. Anything not covered here, call and we will talk it through.
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