Brands

PERMACAST® pours a new concrete manhole and permits the internal assembly of steel forms conforming to the interior dimensions rising through the eccentric or concentric cone or flat top then vibrating high strength concrete into the three inch annulus between the forms and the old wall thus building a new manhole within the old. Wherever the old wall is weakest, the new wall is thickest. Both corrosion and chemical protection are available with Cor+Gard® , embedded plastic liners, or ConShield® additive in the concrete.