Fire stopping in Abbots Langley
Small gaps matter as much as big ones, and they are quicker and cheaper to put right.
Get a priceMade-up office corridor, fitted out twice.
Wall head: a dark joint about 5mm wide where the wall meets the slab. Further along: three cored holes, 25mm, one cable through each. At the end: a service hatch with a gap down one side a pencil slides into.
All three are mastic.
Joint: dust brushed out, backing strip pushed in so the mastic sits at the depth on the maker's data sheet, bead gunned along and smoothed. Cored holes: packed round each cable, same finish. Hatch: bead down the open side.
Too wide and it sags. Too deep and it needs the backing strip, or you get a skin over an empty hole. Dust, old paint and a film of cement stop it sticking.
Photo before the final smoothing, because afterwards nobody can see behind the bead. Record line: corridor 2, wall head, 5mm joint, backing strip and mastic, photo 21.
The sealing is done by our BM TRADA / FIRAS-certificated contractors. There is a minimum charge, and we give you the figure when we price the job. Abbots Langley is one of the wards of Three Rivers District Council. The mastic itself is covered on the intumescent mastic page.
Send us the postcode and a photo or two. We will tell you what it needs and give you a price.
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