The roof of the grade 1 listed Chigwell School had leaked over a number of years leading to decay where water was allowed to pool and be absorbed by the timber. The warm moist environment an ideal breeding ground for decay. Chigwell school decay
The bearing surface where the rafter feet are located has suffered from extensive decay and is now unstable. Removing the carrier beam would cause significant disturbance to the roof structure and require the removal of the rafter and the roof.
The Rotafix method of using Timber Grout, is ideally suited to this application as it does away with the need for the removal of any of the existing structure. The decayed timber and debris was cleared from the carrier beam area.
The area was then shuttered and filled with Rotafix TG6.
TG6 bearing surface
Once cured the heavy filled TG6 will give a solid low compression bearing surface to act as a support to the rafters. As the TG6 goes in as a superfluid liquid with low shear it will find all small cracks and crevices and fill these giving a solid reassuring foundation.
A new section of timber was prepared offsite to replace the damaged beam.
The beam was species matches and age-matched to ensure that its moisture content and expansion would be similar to the existing timber rafters.