How To Install Roof Undercloak

A roofer told me to.

How to install roof undercloak. Lay felt and batts to 2 from verge edge. Install the underlayment for the new roof tile next working with 10 foot sections at a time. Universal undercloak a core component of any roofing project undercloak is a strong tile or fibre cement strip that is fixed at the roof verge beneath the battens. I noticed that there are 2 vertical thin cracks in the mortar of the roof verge near the top.

If your roof has a steep slope install the battens next which are thin strips of material that run horizontally along the roof. If you delay the risk of timber decay and slipped tiles will increase. The overall verge looks fine otherwise. Roof undercloak installation roof undercloak installation overview.

Tips the under cloak should have a fall away from the wall to prevent water running back to the wall and leaving a stain or soaking in. Place a good bed of mortar on at a 3 in 1 mix i would add some glass fibre strands in the mix to help prevent cracking and give it strength. Point it up when setting. Secure the underlayment with nails that are at least 2 inches from the edge of the roof.

The concrete tiles have a cement pointed undercloak to gable ends. You will need to ram the mortar in well then point up. The undercloak board or 4 wide bits of tiles buts up to the batts and are held in place by nails knocked into the ends of the batts. The mortar just sits directly on the soffit fascia.

You might be lucky and leave roof tiles in situ remove under cloak and existing mortar and try to push the board in. Plain tiles are not normally suitable for nailing as undercloaks and so the following applies to. This will provide an effective underlayer to support a bed of mortar and allow for mortar adhesion whilst also offering a clean finish to the verge detail. To begin remove the old roof tile.

Also at the lowest end of the verge where the slope finishes and the verge becomes flat there is no undercloak beneath the mortar. You should carry out repairs soon. Fibre cement undercloak is used on roof verges to support a bed of mortar allow mortar adhesion. The cement pointing is cracked and porous.

The undercloak is layed on a flat bed of cement and projects over the verge edge by 2. Call or email us for a quotation. A mortar bedded verge that is done correctly should last as long as the roof tiles or slates. The undercloak is a cement board which may contain asbestos.