Roof Torching Mortar

This may applied as either a repair to hold slipping slates or pre emptively on construction.

Roof torching mortar.

Is your roof covered with clay tiles. A word about timber treatment. Instead a soft sticky mortar mix was used both to help secure the slates and also prevent draughts. What materials should be used in old houses.

Goodwill feb 27 2009. Traditional buildings did not have bituminous underfelt beneath the slate or tile roofs. It is common for the torching to deteriorate and for pieces to fall away from the inside of the roof. Torching is still used today in heritage properties as an alternative to a modern breathable membrane.

Both are there to stop wind. Traditional variations of a physical secondary barrier against wind driven snow and rain include reeds laid between the tiles and the battens and a coating of mortar known as torching to the underside of the tiles or slates. Impartial advice on damp and damp. A common repair to slate roofs is to apply torching a mortar fillet underneath the slates attaching them to the battens.

What you describe is called torching which is the pointing up with hair mortar of the underside of the roof slates or tiles. Timber oak or elm what not to do to a timber frame. Over the years this torching can crumble and break normally falling with a thud on the floor of the roof space during the middle of the night. Unusual for a house built in the thirties.

The torching on clay tile roofs contributed to securing them in the days before nibs were added to hold them on the wooden battens. Mixing and making hot lime mortar. Surveys of thatched roofing. Torching is most commonly encountered to the underside of old stone slate roofs.

In the days before roofing felt torching or lime mortar was used on the underside of tiles or slates to keep them in place and to prevent strong winds from getting under the tiles and lifting them. Where slates are particularly heavy the roof may begin to split apart along the roof line. This mortar and the process is called torching. There are 2 usual variations of lime mortar iside the loft space if it is torched it is basically rendering the inside of the roof or semi torched is pointing to the battens.

The dangers of rusty iron in old buildings.