This special ridge board has to be positioned carefully so that there will be a gap between it and the ridge tiles when they are fixed. Our house is 100 years old and has a pitched tiled roof. They have a strong adherence to your particular surface … Is there supposed to be a gap between the wall and the roof? About an inch in a bucket all told. It's actually dirt stuck to the adhesive edge of the tile. 3. Clear protective roof sealer to provide lasting protection to all types of roof tiles. At the rear of the property some of the cement from the tiles is missing, maybe this is the reason why I have a leak. This will help to slow down the re-growth of moss, algae and lichen on roof tiles which tend to thrive in a damp, porous, environment. A special ridge board above the apex of the trusses which takes the fixings through the ridge tiles. Gaps are needed to allow the system to function; sealing up, and locking together, roofing elements will result in cracking and breakage of the slates or tiles. Many different types of roofing material come in tile formats. Tips . Our roof sealer will protect porous clay, slate and concrete roof tiles by making them water resistant. End sealing pieces which fit between the ends of adjacent ridge tiles to provide a seal. The water continues like this until it enters the gutter. The roof seems in excellent condition but the mortar is a bit worn round a few tiles. I have removed the moss and the gap between each tile is approximately 1 inch. I live in a two bed bungalow. During recent storms we had a leak in a bedroom. It works by sealing up holes and cracks which might be forming on your roof, air vents, and air conditioning units. A roof sealant is kind of like a mix between varnish and paint. Small gaps between slates reduce the effects of capillarity, and help to prevent water reaching the nail holes. How To Seal Roof Tiles. Viewed 26k times 18. We bought a new house last year. I have scaffolded that part of the house and traced the leak to a couple of ridge tiles. Active 1 year, 11 months ago. I am in the process of resealing the gap between the base of the shower tray and the tiles immediately above. These tiles are stuck fast. Construction workers often leave huge gaps at roof lines (peaks & valleys), edges, and wherever soffits touch the roof. The part of the car port ceiling where it drips - is below clay tiled roof of the house, so water must somehow penetrate beneath the tiles. I hope so, cause if the gaps were between tiles, then you woul have quite a wet house if it rained. (Had some spare, so thought might as well) You can't avoid that. But yeah, chicken wire is good, or anything similar. Or suppose the workers cut holes in the roof for ventilation, but didn't screen them, as is often the case. Do you fill the gap with just sealant and smooth off, or can you fill the main gap initially with grout and then seal with sealant.Any other ideas appreciated. Suppose the regular wooden roof has a hole or gap somewhere, but I can't find it because tiles are blocking it. As far as the "line" appearing between tiles, that's just how vinyl tiles look. However, the tiles have been cut quite short leaving a substantial gap to fill. Now, a lot of standing water, yes. Going up to the loft we noticed there is a considerable gap (5-6 cm) between the roof and the wall, like this: Is it supposed to be like that? If the subfloor was properly prepped, (sealed properly) and the correct adhesive was used for the tiles, you won't have "casual" water damage. Cement or sealant to fill gaps between leaky roof tiles? Ask Question Asked 4 years ago. 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