Frequently asked questions
How many shingles do I need for my roof? ▼
Roofing materials are sold by the "square" — 1 square covers 100 sq ft of roof surface. To calculate squares needed: (roof footprint length × width × pitch factor) ÷ 100, then add 10–15% for waste and starter strips. A 1,200 sq ft footprint with a 6/12 pitch has approximately 1,344 sq ft of actual roof surface (×1.12 pitch factor), requiring about 14–15 squares plus waste. Always add extra for valleys, hip ridges, and starter courses. Use the calculator above for a precise count based on your specific roof dimensions and pitch.
How much paint do I need for a room? ▼
One gallon of paint covers approximately 350–400 sq ft per coat. To calculate wall area: (perimeter of room × ceiling height) minus doors (~20 sq ft each) and windows (~15 sq ft each). For a 14×16 room with 9-ft ceilings, the wall area is about 540 sq ft — that's roughly 1.5 gallons per coat. For 2 coats, buy 3 gallons of wall paint. Ceilings require about 1 gallon per 400 sq ft. Always buy slightly more than calculated — leftover paint is useful for touch-ups and color matching years later.
How many deck boards do I need? ▼
For a standard deck using 5/4×6 boards (5.5" actual width) with 1/4" gaps, you need approximately 2.18 boards per linear foot of deck width. For a 16-ft wide deck: 16 ÷ (5.5" + 0.25") × 12 = approximately 33 boards per run. Multiply by deck length divided by board length, then add 10–15% for waste and end cuts. Composite decking is sold by linear foot or by the piece — check the specific manufacturer's coverage specs as they vary. Use the deck calculator above for a precise count including joists and posts.
How many drywall sheets do I need? ▼
Calculate total wall and ceiling area, subtract doors (roughly 20 sq ft each) and windows (roughly 15 sq ft each), then divide by the sheet size (a 4×8 sheet = 32 sq ft; a 4×12 = 48 sq ft). Add 10% for waste and cuts. For a 14×16 room with 9-ft ceilings: walls are about 540 sq ft + ceiling 224 sq ft = 764 sq ft total minus openings ≈ 720 sq ft. At 48 sq ft per 4×12 sheet: 15 sheets + 10% waste = 17 sheets. Larger sheets (4×12) mean fewer seams and less taping work — always preferred for a smoother finish.
How do I calculate how many wainscoting boards I need? ▼
Wainscoting requires calculating four types of boards separately: (1) Stiles — vertical boards that run the full wainscoting height, placed at each panel edge. Count = number of panels + 1. (2) Top rail — one horizontal board running the full wall width at the top of the wainscoting. (3) Bottom rail / base cap — one horizontal board at the bottom. (4) Panel inserts — the recessed or flat panels between stiles, typically cut from MDF sheet. The number of panels depends on your wall width, stile width, and desired panel opening width — typically 12–20 inches wide for good proportion. Use the calculator above to get exact counts and a visual preview before buying any material.
What is the standard wainscoting height? ▼
The most common wainscoting heights are 32 inches (one-third of an 8-foot ceiling) and 36 inches. Traditional design rules suggest wainscoting should cover one-third to one-half of the wall height. In rooms with 9-foot ceilings, 38–42 inches is common. In dining rooms with chair rails, 32–36 inches aligns with the chair rail height. Taller wainscoting (48+ inches) in spaces with high ceilings creates a dramatic, formal look. The golden rule: wainscoting height should feel proportional to the ceiling height — never more than halfway up the wall in standard rooms.
What's the difference between board and batten and raised panel wainscoting? ▼
Board and batten is the simplest style: wide flat boards (boards) are installed vertically, with narrower strips (battens) covering the seams. It's farmhouse and craftsman in style, very DIY-friendly, and uses the least material. Raised panel wainscoting is the most traditional style: stiles and rails frame a center panel that is raised above the frame surface, creating a three-dimensional look. It requires a router or pre-routed panels and more skill. Shaker (flat panel) wainscoting splits the difference — stile and rail framing around a flat recessed panel. It suits modern, transitional, and craftsman homes and is easier to DIY than raised panel. All three styles use similar material quantities; the main differences are in the panel insert material and the skill required for installation.
How many fence boards do I need for 100 feet of fence? ▼
For a standard 6-foot privacy fence using 1×6 boards (5.5" actual width) with no gaps, 100 linear feet requires approximately 218–220 boards. With 10% waste added, order 240–245 boards. For board-on-board style with 1" overlap, you'll need roughly 260–270 boards for the same length. The exact count depends on board width, overlap style, and your waste factor. Use the calculator above with your specific dimensions for a precise count.
How much extra flooring should I buy for waste? ▼
The standard rule: add 10% for straight-lay installations, 15% for diagonal (45°) layouts, and 20–25% for herringbone or complex patterns. Add an extra 5% if the room has many obstacles, alcoves, or irregular angles. It's always better to have leftover flooring (keep it for future repairs) than to run short mid-project — dye lots change between manufacturing runs, so an exact color match later is never guaranteed.
How deep should fence posts be set? ▼
The general rule is to bury fence posts at least 1/3 of their total length, plus 6 inches for gravel drainage. For a 6-foot fence, use 9-foot posts set 3 feet deep. In frost-prone areas, posts must be set below the frost line to prevent heaving — your local building department can tell you the frost depth for your area. Most areas range from 18 inches (warm climates) to 48 inches (northern states). Always use concrete to set posts, and slope the top of the concrete away from the post to shed water.
Do I need a permit to build a fence? ▼
It depends on your municipality and fence height. Most areas require a permit for fences over 6 feet tall. Many HOAs have additional restrictions on height, material, and style. Check with your local building department before purchasing materials — setback requirements (how far from the property line) vary by city. A survey of your property lines before digging is highly recommended to avoid disputes with neighbors and potential removal orders.
What's the difference between LVP and laminate flooring? ▼
The key difference is water resistance. Luxury vinyl plank (LVP) is 100% plastic and completely waterproof — it can be installed in bathrooms, kitchens, and basements without concern. Laminate has a fiberboard core that swells and warps when wet, making it unsuitable for moisture-prone areas. LVP is also softer underfoot and quieter. Laminate typically has a more authentic wood look and feel due to a photographic layer. Both use click-lock installation and are DIY-friendly. For most applications, LVP has largely replaced laminate due to its waterproof advantage.
How long does it take to install flooring yourself? ▼
A 200 sq ft room typically takes a DIY first-timer 6–10 hours for laminate or LVP — including prep, layout, cutting, and installing transitions. An experienced installer does the same room in 3–4 hours. Tile takes significantly longer: the same 200 sq ft room can take 2–3 days when accounting for layout, thinset application, tile setting, grouting, and curing time. Solid hardwood installation is the most labor-intensive and is generally recommended for professional installation.