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McAlpine RS1 Aluminium Roof Flashing 18" x 18" for 4"/110mm pipe

3.9 (11 reviews)
SKU: 260223155537645 EAN: 5036484007209

Compare 2 prices for McAlpine RS1 Aluminium Roof Flashing 18" x 18" for 4"/110mm pipe — from £34.00 to £41.09 across 2 UK sellers including Travis Perkins, Toolstation. Save up to £7.09 (17%).

£34.00 10h ago
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Compare Prices from 2 Sellers

Prices updated 20 Apr 2026
2
Toolstation
£41.09 +£7.09
8h
#2 Toolstation
8h ago
£41.09 +£7.09
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18inch x 18inch x 4inch/110mm pipe Aluminium Roof Flashing (MacFlash). Suitable for flat roofs and roof pitches up to 45 degrees Special corrugations that can be easily dressed to form a seal Can be used with flue pipes for condensing boilers Collar die-formed to flashing and manufactured from synthetic rubber to British Standards Easy to install and use
No specifications available
No features listed
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Customer Reviews 11

3.9
11 reviews
5 star
6
4 star
0
3 star
4
2 star
0
1 star
1
Excellent quality roof flashing
5.0
January 18, 2026
996e7c1c-6759-5a8d-a915-c8d536304f28 Verified Purchase

Excellent product. Solid aluminium with a good, flexible seal around the pipe. Fits perfectly, easy to install, and gives a neat, professional finish on the roof. Exactly what I needed and feels built to last. Would happily use again and recommend to others.

Roof soil pipe flashing
3.0
October 9, 2023
DaB over Verified Purchase

Better off getting a lead one. Not as flexible when used on a pitch roof. Keeps lifting. Had to go back to reapply more adhesive . Not as easy to shape to match tiles

Very efficient service ordered on the Sunday arrived Monday lunch time
5.0
September 20, 2023
Chris Ansley Verified Purchase

Dose what it says on the tin good quality product 2 required 2 delivered

Excellent product, almost!
3.0
July 8, 2023
Andy T Engineer Verified Purchase

A mechanical engineer by profession I bought this because of the cone seal design which is very good. However, the top and bottom edges need to be 40 to 50mm longer to make it a better solution for shallow pitch tiled roofs. Can always be trimmed if necessary but can't be extended when required. The extra material cost is negligible.

5.0
December 18, 2022
qadx4r978pvvpr2epcnh8vhyu Verified Purchase
1.0
November 17, 2022
Skipster Verified Purchase
Flashing for pipe
5.0
October 1, 2022
Mercedes sprinter Verified Purchase

Used with boiler flue out of roof

OK, but not ideal
3.0
March 27, 2022
JonnyBadger Verified Purchase

I found the plate slightly too short for a standard slate roof, but just about got away with it. The rubber boot will accommodate a pitched roof but it’s not really the ideal shape unlike other makes which are appropriately angled.

5.0
March 20, 2022
matkse1x2tq8nvaw26p6on4pl Verified Purchase
Good quality flashing.
5.0
December 17, 2021
KBoni Verified Purchase

Solid quality , with tight connection around the neck

Ok, generic version was better
3.0
July 22, 2017
Toolstation7878 Verified Purchase

This is a fine enough flashing. Did the job. However, it was twice the price as the generic version Toolstation sells but half the size (athough it doesn't need to be any larger. The rubber gland seemed robust, but was set to only take 100-110mm pipe as its pre cut, so can't be used on smaller and large pipe. We used on a 100mm combi flue on a pitched roof. There is no pre set angle on the rubber gland like the generic version, so it bends to fit on pitcher roofs, but can't see why it doesn't have an angle for easy of installation. The flashing is made from aluminium which isn't as roof hugging as lead would be and ended up having to screw the flashing down at the bottom.

7 found this helpful
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